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  • Definion 5 Surround
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  • Definion 5 Surround
  • Definion 5 Surround
  • Definion 5 Surround
  • Definion 5 Surround
  • Definion 5 Surround
  • Definion 5 Surround
  • Definion 5 Surround
  • Definion 5 Surround
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Definion 5 Surround

Enter an elite circle of sound
High-end surround sound speaker set with Teufel's award winning Definion 5
  • 8 week trial
  • Up to 12 year guarantee
  • Free & easy returns

Highlights

Why we love this product
The Definion 5 Surround is perfect for those who want it all: Award-winning stereo sound and a thrilling multichannel home cinema experience.
Key advantages at a glance
  • High-end surround sound speaker set with Teufel's award winning Definion 5
  • For an extraordinarily precise sound reproduction with great dynamics and deep bass
  • Huge level reserves thanks to a large total membrane surface area
  • Patented coaxial drivers for a truly 3 dimensional sound image
  • Elaborately braced, trapzoidal enclosure minimizes resonances
  • Efficient design for more performance from smaller enclosures
Features

Overview of our technologies

Downfire
Subwoofer sensationwith DSP

The most striking advance is the improvement of the subwoofer. Despite a two-thirds reduction in the size of its enclosure, the System 8's sub is the only subwoofer in the world to meet the exacting THX Ultra 2 standards with just one high-performance bass driver. A lengthy development process resulted in the extra long-throw woofer with magnetic shielding which is primarily responsible for the incredible performance of the S 8000 SW. The extremely efficient design allows 500 watts to produce very high levels free from distortion (e.g. 114 dB). Sophisiticated Digital Signal Processing (DSP) fine tunes the sound.

Teufel Aktiv Subwoofer Bass S 8000 SW
Redefining high-end hifi

No detail, no matter how small, was overlooked in the conception and construction of the Definion 5. The end result is an uncompromising high-end loudspeaker that delivers musical nuances free from distortion with an imposing and powerful sound.

Patented SCA (Synchronized Coaxial Acoustics) Technology offers the best conditions for the realisation of point source sound. After 2.5 years of intense development, an audio quality was achieved that sets new standards for dimensionality, fine tuning and precision. Individual instruments retain their natural clarity, allowing even inexperienced listeners to easily recognize tonal differences in high and midrange frequencies as compared to traditional loudspeakers.

Triple bass concept

Precision was the guiding principle of this product’s development. All drivers are designed for an amazingly broad range, and the bass drivers achieve astonishingly low cut-off frequencies, allowing you to experience a punchy, clear bass. At the same time, the tweeter’s light membrane can handle peaks without distortion. The Definion 5 is quite simply the slimmest loudspeaker in its class with the strongest bass.

Are sealed enclosures critical to really good bass sound? Many experts would say they are, and we at Teufel are the experts. With the construction of a highly specialized subwoofer chassis on the Definion 5, we’ve taken sealed box design to a whole new level. The advantages of this classic system are well-known: exemplary precision with regard to transient response and the best possible response at high levels with very little distortion, neither of which would be possible with any other type of loudspeaker enclosure. Feel the bass as you would with an additional subwoofer, only clearer and in a sleeker design.

Hi-End-Lautsprecher Definion 5 2
Hi-End-Lautsprecher Definion 5 Weiss 3
Modern look & feel

The cabinet cleverly combines a sleek design with acoustic functionality. The exceptionall well-braced trapezoidal shape reduces room resonances and reflections. In addition, an innovative floating baffle prevents the transference of cabinet reflections to the listening position. The curvature of the baffle forms a waveguide for higher frequencies that have a tendency to concentrate more in a vertical direction. This results in a precise and detailed sound within a very wide listening range.

Hi-End-Lautsprecher Definion 5 Weiss 3
Linear frequency and phase

Unlike a conventional chassis, the coaxial principle with a flat membrane produces a wide sound dispersion without a mechanically induced time delay. The crossover was constructed in such a way as to bring this advantage to the fore. An especially broad dispersion angle combined with time-optimised filters produces a very linear frequency and phase response allowing the Definion 5 to deliver an intense listening experience.

Sealed enclosures
With the construction of a highly specialised subwoofer chassis on the Definion 5, we’ve taken sealed box design to a whole new level. The advantages of this classic system are well-known: exemplary precision with regard to transient response and the best possible response at high levels with very little distortion, neither of which would be possible with any other type of loudspeaker enclosure. Feel the bass as you would with an additional subwoofer, only clearer and in a sleeker design.
Hi-End-Lautsprecher Definion 5
Design
The age of having your living space filled up with large, obtrusive speakers is over. We believe that you shouldn't have to sacrifice your space for epic sound and that speakers should be effortlessly integrated into your living environment. The design of the Definion 5, with white and black elements as well as a decorative trim in a stainless steel finish, harmoniously blends into the living space - elegant, slender, unobtrusive.
Hi-End-Lautsprecher Definion 5 null 1
Patented SCA technology

Patented SCA technology (synchronized coaxial acoustic) offers the best conditions for approaching the ideal of a point source. After 2.5 years of intense development, a quality of playback was achieved that sets new standards for precision in terms of dimensionality, fine dynamics, and precision. Individual instruments retain their natural sound, and even less experienced listeners will notice the difference between between the Definion and other loudspeakers. Muisc sounds vivid and fully present, like listening to a live concert.

A small audio engineering marvel

The elegant design combines a slender form with high-end acoustic functionality. A sophisticated reinforced trapezoidal form reduces resonances to a minimum, and an innovative floating baffle prevents enclosure reflections from being transmitted to the listening position. The curvature forms a waveguide for the higher frequencies which have a tendency to concentrate in a vertical direction. A precise sound within a broad listening range is the result. Individual instruments can be pinpointed in the full and rich soundstage that is created and seem almost tangible.

Hi-End-Lautsprecher Definion Weiss 3
Dual bass system

The specially constructed bass driver is able to achieve a very low end in a relatively small, sealed enclsure thanks to a clever design.

The technical features of the bass drivers:

  • Generously dimensional driver action with a 1½“ voice coil for the best bass control & load capacity
  • Very large linear excursion: X-Max= +/- 8 mm for low distortion with high levels
  • Vented voice coil carriers reduce distortion as well as compression effects
  • Air-cooled pole piece with double convection channels reduce the risk of wind noises
  • Highly stable voice coil carriers made from black fiberglass reduce the loss of mechanical energy for increased dynamics & more precise playback with finer nuances
  • Strategically placed aluminium rings homogenize the magentic field and so lessen the dynamic compression effect
  • A highly stable die-cast basket ensures highly precise membrane movement at high levels as well as unimpeded heat dissipation
  • A light and rigid aluminium and paper fibre sandwich membrane construction effectively reduces partial oscillations
  • Low loss suspension design prevents mechanical  friction losses for a very low end
Bi-wiring and bi-amping

An additional technical highlight is a connection terminal that allows for bi-wiring and bi-amping. An optional stand positions the Definion 5S at the perfect height for listening from a typical seated position. The cable can be tucked away inside the stand.

Hi-End-Lautsprecher Definion 5 Weiss 4
Definion 5S as rear speakers

Thanks to almost identical driver construction and tuning, the Definion 5S is an ideal rear speaker to combine with the Definion 5 for surround sound. Together with a Definion centre and optional subwoofer, the Definion 5S creates a very impressive surround system capable of rending music and movie sound that is detailed, balanced, and true-to-source.

Included components

  • Floor Speaker DEF 5 F
  • Satellite Speaker DEF 5S FCR
  • Active Subwoofer S 8000 SW
  • power cable
  • Definion Speaker Stand
  • Baseplate DEF 5S CB
  • Baseplate DEF 5S FRB (Stk.)

Specifications

Active Subwoofer S 8000 SW
Active Subwoofer S 8000 SW
Never before has a manufacturer used a 300 mm driver in a housing from 80 liters and still received the THX Ultra 2 certification – until Teufel did it.
Active Subwoofer S 8000 SW
Speaker
Downfire Yes
Enclosure type Bass reflex
Woofer (number per enclosure) 1
Woofer (diameter) 300,00 mm
Woofer (material) Cellulose, coated
Enclosure material MDF
Enclosure surface Lacquer, high gloss
Equalisation openings 1
Equalisation openings (pos.) Back
Net internal volume 83,70 Litres
Spikes prepared Yes
Integrated stand Yes
Magnetic shielding Yes
Suitable for AV receiver Yes
Connections
Cinch input stereo 1
Electronics
Lowest frequency (-3 dB) 25 Hz
Input gain adjustment Yes
Frequency regulator (range) 60-220 Hz
Full Range/Low Pass switch Yes
Phase control Yes
Remote control Yes
Amplifier technology Class AB with DSP
Amplifier channels 1
Power output capacity impulse (peak) Bass 650 W
Power output capacity sinus (RMS) Bass 500 W
Power supply voltage 230 V / 50 Hz volts
Standby-Function Yes
Maximum power consumption 1200 watt
Mains cable - IEC connector (non-heating device) Yes
Storage for settings when disconnected Yes
Display Yes
Display color Red
Display type LED
Dimensions
Depth 70,00 cm
Width 36,00 cm
Height 54,80 cm
Weight 41,70 kg
Floor Speaker DEF 5 F
Floor Speaker DEF 5 F
A high-end loudspeaker with exceptionally precise sound reproduction and a patented coaxial chassis for outstanding dimensionality and fine tuning. The triple bass system renders excellent dynamism, impulse response and low bass frequencies.
Floor Speaker DEF 5 F
Speaker
Acoustic principle 3-Way-System
Enclosure type Closed
Continuous power handling (IEC - Long Term) 250 Watt
Peak power capacity (IEC - Short Term) 350 Watt
Sensitivity (2.83 V / 1 m) 85 dB
Minimum amplifier output power recommended 50 Watt
Maximum sound pressure level 104 dB/1m
Impedance 4 Ohm
Frequency range from/to 42 - 22000 Hz
Tweeter (number per enclosure) 1
Tweeter (diameter) 25,00 mm
Tweeter (material) Fabric dome tweeter, coated
Midrange driver (number per enclosure) 1
Midrange driver (diameter) 105,00 mm
Midrange driver (material) Aluminium hexacone kevlar sandwich membrane
Woofer (number per enclosure) 3
Woofer (diameter) 130,00 mm
Woofer (material) Aluminium papier fiber sandwich membrane
Enclosure material MDF
Enclosure surface Varnish, satin finished
Net internal volume 45 Litres
Integrated stand Yes
Terminal clamps Gold-plated screw terminals
Suitable for banana plug Yes
Bi-Amping/Bi-Wiring Yes
Maximum cable diameter 6,00 mm
Suitable for AV receiver Yes
Dimensions
Depth 37,00 cm
Width 21,80 cm
Height 108,90 cm
Weight 30,75 kg
Satellite Speaker DEF 5S FCR
Satellite Speaker DEF 5S FCR
A high-end speaker with patented coaxial drivers for outstanding dimensionality and fine dynamics. A sealed enclosure and two bass drivers deliver a wide dynamic range, impulse fidelity, and deep bass. The base plate is included with delivery.
Satellite Speaker DEF 5S FCR
Speaker
Continuous power handling (IEC - Long Term) 120 Watt
Peak power capacity (IEC - Short Term) 180 Watt
Sensitivity (2.83 V / 1 m) 85 dB
Minimum amplifier output power recommended 50 Watt
Maximum sound pressure level 104 dB/1m
Impedance 4 - 8 Ohm
Frequency range from/to 65 - 22000 Hz
Crossover frequency internal switch 200 / 3000 Hz
Tweeter (number per enclosure) 1
Tweeter (diameter) 25,00 mm
Tweeter (material) Fabric dome tweeter, coated
Midrange driver (number per enclosure) 1
Midrange driver (diameter) 105,00 mm
Midrange driver (material) Aluminium hexacone kevlar sandwich membran
Woofer (number per enclosure) 2
Woofer (diameter) 130,00 mm
Woofer (material) Aluminium paper fiber sandwich membran
Acoustic principle 3-Weg
Enclosure type Closed
Enclosure material MDF
Enclosure surface Varnish, satin finished
Net internal volume 23 Litres
Magnetic shielding Yes
Terminal clamps Gold-plated screw terminals
Suitable for banana plug Yes
Bi-Amping/Bi-Wiring Yes
Maximum cable diameter 6,00 mm
Suitable for AV receiver Yes
Connections
High Level loudspeaker inputs 1
Dimensions
Depth 31,10 cm
Width 22,00 cm
Height 61,30 cm
Weight 16,40 kg
Miscellaneous The centre is 61.30 cm wide.
Center Speaker DEF 5S FCR
Center Speaker DEF 5S FCR
A high-end centre speaker with patented coaxial drivers for excellent dimensionality and fine dynamics. A sealed enclosure and two bass drivers deliver a wide dynamic range, superior impulse response, and deep bass. A bass plate is included with delivery. The Definion 3 centre loudspeaker should be positioned horizontally.
Center Speaker DEF 5S FCR
Speaker
Acoustic principle 3-Way-System
Enclosure type Closed
Continuous power handling (IEC - Long Term) 120 Watt
Peak power capacity (IEC - Short Term) 180 Watt
Sensitivity (2.83 V / 1 m) 85 dB
Minimum amplifier output power recommended 50 Watt
Maximum sound pressure level 104 dB/1m
Impedance 4 - 8 Ohm
Frequency range from/to 65 - 22000 Hz
Crossover frequency internal switch 200/3000 Hz
Tweeter (number per enclosure) 1
Tweeter (diameter) 25,00 mm
Tweeter (material) Gewebekalotte, beschichtet
Midrange driver (number per enclosure) 1
Midrange driver (diameter) 105,00 mm
Midrange driver (material) Aluminium-Hexacone-Kevlar-Sandwich-Membran
Woofer (number per enclosure) 2
Woofer (diameter) 130,00 mm
Woofer (material) Aluminium-Papierfaser-Sandwich-Membran
Enclosure material MDF
Enclosure surface Schleiflack, seidenmatt
Net internal volume 23 Litres
Magnetic shielding Yes
Terminal clamps Schraubklemmen, vergoldet
Suitable for banana plug Yes
Bi-Amping/Bi-Wiring Yes
Maximum cable diameter 6,00 mm
Suitable for AV receiver Yes
Connections
High Level loudspeaker inputs 1
Dimensions
Depth 31,10 cm
Width 61,30 cm
Height 22,00 cm
Weight 16,40 kg

Expert reviews

Definion 5 Surround review of Video
Active Subwoofer S 8000 SW
Definion 5 Surround review of Video
"Victor in Video's 2011 Reader's Choice"
Video 02/2011
"Teufel's S 8000 SW subwoofer won first place in Video's 2011 Reader's Choice for the category "Active Subwoofer"."




Downloads & support

Help regarding this product
Do I also have a 6.1/7.1 playback for a 5.1 recording?
Usually, all 6.1/7.1 AV Receivers can generate a 6.1/7.1 playback from a 5.1 recording. The procedure is comparable with the Dolby Pro Logic Decoder, which generates a matrix circuit from the stereo signal of a centre channel.

The AV Receivers thus generate a rear centre channel from the rear R/L channels of a 5.1 recording through the matrix circuit. The stronger the rear R/L effects on the DVD, the stronger the signal from the rear centre.
Can I connect the LT 4 directly to a DVD player or PC?
No.

The LT 4 is a partially active system that requires AV receiver operation. It has a built-in amplifier that only supplies bass tones in the subwoofer housing That is why an "AV Receiver", i.e. a combination of radio receiver and multichannel amplifier, is essential for using the LT 4.

The subwoofer is connected from the Line In R input to the AV receiver's sub out jack using a mono RCA cable, while the three front satellites are connected to the three speaker outputs of the AV Receiver using the speaker cable and are supplied with power from there.

Connect signal-emitting source appliances such as DVD player or PC etc. directly to the corresponding input jacks on the AV Receiver.
When would it be worth upgrading my 5.1 system to 6.1/7.1 sound?
Naturally 5.1 channel systems that play back all of the sound tracks contained on the DVDs already offer an excellent home cinema experience.

For the new 6.1 or 7.1 sound formats, a rear centre channel is controlled in addition to these channels. This channel, coded in the stereo effect channels, enables the better positioning of effects and music signals directly behind where you are sitting.

If using two speakers for the rear centre channel, the optimal seating position is not tailored to an individually specified position, i.e. you don't have to be seated in the exact centre.

In the following cases we would recommend upgrading to a 6.1 or 7.1 system:

• Your sitting position is not always dead centre, or you often have several viewers

• You have had a 5.1 system for a very long time and would like an improvement

• Your AV amplifier/receiver is designed as a 6.1 or 7.1 receiver and offers the corresponding connection possibilities

• You can also set up one and/or two rear centres. If you are currently building/renovating your house or flat, we would recommend you lay the cables for the additional rear centre channels in any case.

• Modern BluRay players usually issue a true 7.1 surround sound signal at all digital outputs and are thus optimally suitable - presuming the relevant AV Receiver - as a signal transmitter for a 7.1 channel home cinema system.
How do I upgrade my system to a 6.1 or 7.1 sound format?
The choice of speaker(s) depends on the AV Receiver/amplifier. This has an additional power amplifier for one rear centre (6.1) or its two (7.1). You can easily see this by the wattage (e.g. 6 x 100 watt or 7 x 100 watt). To the existing (side) rear speakers for right/left (5.1 technology), one or two additional rear centres are utilised in addition (6.1 or 7.1 technology).

• My AV amplifier/receiver has six connections/power amplifiers (6.1):

In this case we recommend connecting the same centre at the rear that you also used in the front area.

• My AV amplifier/receiver has 7 connections/power amplifiers (7.1):

If you already use dipoles or direct emitters for your 5.1 system, then you have a choice of either supplementing two more dipoles or two direct emitters. For wall assembly and a short distance from the seating location to the rear wall (less than 1.00 metres), we would recommend dipoles. As soon as you want to set up the speakers on bases or on a shelf, then direct emitters would be the better choice.

Information:
Even if the AV Receiver/amplifier only has the connection and power amplifier performance for one rear centre, it is still possible to connect two instead of just one speaker through series connection.

Exception:
• The AV amplifier/receiver has seven connections/power amplifiers, but I can only set up one rear centre. As the 7.1 AV amplifiers/receiver also offer the option of operating just one of the two outputs (usually can be set in the speaker set-up!), you can also only connect just one rear centre.

Here we recommend connecting the same centre to the rear that you also used in the front area. For short distances to the listening location (less than 1.00 metres), a dipole would be the better choice - especially if you are also using dipoles at the sides.
Is it a problem if the speakers are at different distances to where you are sitting?
Since the distance and volume of every individual speaker can be adjusted for the digital home cinema receivers, asymmetrical set-ups can be easily compensated. 
How do I equalise my home cinema system with the help of a sound level meter?
Take the level meter with you to the listening position and point the measuring device directly towards the front centre speaker. Now start the sound generator of the receiver (or of the sound card or DVD player) and equalise all speakers in succession to the same level.

The position and alignment of the measuring device should not be changed during this procedure. For a Teufel sound level meter, proceed as detailed in the following:

1. Remove the protective tab from the battery.

2. Set the weighting to "A" - only the "A" position considers the full frequency range during measuring!

3. Set the response to Slow.

4. Set the Range to 70.

5. Start the test noise from your AV device.

6. Change the volume for every individual channel at the AV device so that the level meter shows 75 dB (meaning between +4 and +6).

7. Done!
What is the difference between the 5.1 and 7.1 configuration?
Compared with the 5.1 set, the 7.1 set has two extra speakers for the back rear centre channel.

The 5.1 channel set plays back all sound tracks on DVDs/Blu-rays and creates an excellent home cinema experience.

With the 7.1 sound format, a rear centre channel is also generated in addition to these channels and distributed to two further speakers (the "rear centre"). This channel, which is encoded in the stereo effects channels, allows better location of effects and music signals directly behind the sitting position.

If you use two speakers for the rear centre channel (i.e. installed 7.1 set), the optimum sitting position is not restricted to one specific place, so you don't have to be sitting exactly in the middle and several listeners can enjoy the best sound.
Where is the optimal place for the centre of my Lautsprecher Teufel Surround System in a 5.1/6.1/7.1 configuration?
Because the centre plays back spoken dialogue, this speaker must be positioned as centrally as possible under or over the TV/monitor or the screen.

If the centre is placed outside the area of 40 centimetres to 1.20 meter height, it should be slightly inclined or angled towards the listener.


Can I order the Teufel speakers in different colours than those offered?
To realise the very reasonable sales prices usual for Teufel, it is not possible to offer the speakers in a multitude of housing designs.

This circumstance would drive up the production and storage costs, which would result in a significantly more expensive sales price.

A paint shop in your vicinity will surely be able to repaint the speaker housing to your preferred colour without loss of warranty - after expiry of the eight-week right of return.
Which cables do I need to connect a Teufel speaker set to the AV Receiver?
A home cinema system needs speaker cables to connect the satellite speakers to the receivers, and an NF mono RCA cable to connect the active subwoofer to the sub out socket of the AV Receiver.
When can I use the rear speakers as direct speakers?
If you aren't able to position the speakers close to the wall as described above, you should use the them as direct speakers. For this purpose the rear switch should be tipped outwards. For use as direct speakers, the rear boxes should be set up to the left and right of the listening position - ideally at the same height, e.g. on a shelf or preferably on a base. If the speakers have to be set up so that they are much higher or lower, it may be advisable to align them to the listening point. For wall mounting it is best to use wall brackets that allow for vertical movement. When using the speakers in direct speaker mode, we recommend that the distance between the two rear speakers exceeds the listening position by 1m. But if you (have to) sit closer, please make sure that the front of the speaker is not pointing directly at you; instead, angle the speakers more into the room.
My subwoofer is humming. What can I do?
This hum can be caused by the connected devices or disruptions in your electricity current. Please do a test to see which it is.

1. Remove the RCA cable from the input on the subwoofer. If the hum is no longer heard, go to point B. Otherwise, follow point A.

A. Attach the net cable of the subwoofer to another electricity outlet (i.e. Kitchen/Bathroom/Bedroom). If the subwoofer still hums, get in contact with our Support team.

Should the hum no longer be there, the disruption was a problem in your power supply, which can, for instance, be caused by dimmers or chargers. To find out where the disruption is, unplug all your devices and work back from there. As soon as the hum is heard, you now know your source of the disruption.

B. In your case, the "ground hum" is responsible for the disruption. Please proceed as follows to discover your source.

  • Disconnect the cable or satellite port from the TV Receiver and check if the hum disappears or not. If it does, you can use a sheath current filter for the cable outlet to prevent this. For example, the sheath current filter AC 9022 ED. If you have a satellite connection, connect the Satellite Receiver to the optical cable playback source - Teufel Optical Digital Cable

  • If this reason can be excluded, separate all devices from the AV Receiver one at a time until the hum stops. The last connected device is then your hum source and should be separated from the others using a galvanic separation filter (found in a retail shop)

  • If this doesn't work, get in contact with us once again so that we can give an individual, helpful response.
Will an active subwoofer only run in 5.1 mode or also in stereo mode?
Thanks to the speaker set-up/bass management integrated in the home cinema receivers/amplifiers, the subwoofer functions in stereo, Dolby Surround and digital mode.

The corresponding setting in the speaker set-up must be adjusted individually for each source for many receivers, however, e.g. for CD playback only front without woofer, and front speakers plus woofer for Dolby Surround video playback.
Why doesn't my active subwoofer switch on automatically?
Some AV Receivers/amplifiers issue the bass signals via the subwoofer pre-amplifier output so quietly that the subwoofer does not start automatically.

To make sure the subwoofer switches on and off correctly in automatic mode, (to be selected on the corresponding switch of the subwoofer, such as "Auto / On / Off"), we recommend turning the level control on the subwoofer to 1/3 or perhaps to 1/2 and increasing the output level for the sub in the receiver's speaker set-up – sometimes up to the maximum (+10 dB or +12 dB). The subwoofer should then work perfectly.

The maximum position of the output level in the speaker set-up of the AV Receiver is obligatory for some of our models (e.g. the Concept S subwoofer).
How do I connect my fully active Teufel system to an AV Receiver?
Although designed to be fully active, the Teufel set is also partially active in conjunction with an AV Receiver.

You can connect it like a standard speaker system: the five satellites via speaker cable to the corresponding speaker outputs front R/L, rear R/L and centre of the AV Receiver/amplifier and the subwoofer from the front R input via a mono-RCA cable to the Sub Out output on the A/V Receiver/amplifier.

Please note:
The auto on/standby switch only responds when the front R input is being used! The subwoofer also receives the full subwoofer signal via this channel.

If the AV Receiver/amplifier has preamplifier outputs for all channels (front R/L, rear R/L, centre and subwoofer), the Teufel set can also be connected via three RCA cable pairs to the subwoofer and the satellites via speaker cables to the subwoofer. However, we recommend using the first version.
What is a ground hum?
The hum (50 Hz) comes from the 220 volt supply network and is caused by current power flows through the protective conductor. These so-called "ground hums" is caused when you connect two devices that are already grounded on the protective conductor (subwoofer) or the antennae cable (AV Receiver) to the subwoofer cable.

Solution:
Separate the direct connection by a grounding filter for the antennae cable that is created for it - for instance, the Teufel modell sheath current filter AC 9022 ED. Alternatively, you can use a galvanic separation filter that is looped into the connection between the subwoofer and AV Receiver.

The hum disappears if the antennae cable is separated from the Receiver/Tuner/TV. First try the grounding filter, otherwise the galvanic separation filter.
Where is the optimal place for the subwoofer of my Lautsprecher Teufel Surround System in a 5.1/6.1/7.1 configuration?
The location of a subwoofer with a recommended cut-off frequency of under/equal to 120 Hz can be freely selected and does not affect the other speakers.

Placement within the straight line between both front satellites is ideal - but not precisely in the corner of the room because certain frequency components could be unpleasantly excessive when played back.
How do I determine the right phase setting of the subwoofer?
By setting the phase, you can affect the point at which the membrane of the subwoofer bass speaker moves to the front. This setting makes it possible to optimally adjust the subwoofer to the satellites.

The membranes of the satellites should move to the front at the same time as the membrane of the subwoofer bass speaker, because all speakers of the system must vibrate in phase for optimal playback. This means that (provided the connection has the correct polarity) all drivers must move in one direction when the three front speakers receive a pulse (towards the outside or towards the inside).

If the subwoofer is in line with the front speakers, its bass speaker should have the same direction of movement (phase) - the controller on the woofer is set to "0". If the subwoofer is not between the front speakers, but is to the side of or even behind the listening location, its phase length will not match that of the front speakers. That is why the phase of the subwoofer must be changed in such cases.

So much for the theory. In practice, this means: Listen to a loud piece of music with heavy basses and ask a second person to change the phase during playback. The correct setting of the phase switch depends on where the subwoofer is positioned in the room. The position where the bass playback (above all the upper bass range) sounds the fullest is the correct position. Have fun trying it out!
What is the use of the on/off automatic switch ("Auto On/Off") of the active subwoofer?
The On/Off switch is a power-saving standby switch. The switch must be set to "On" or "1" to activate the standby. The subwoofer is activated as soon as it receives a strong bass signal. After approx. ten to twenty minutes of no signal, or only after receiving a very weak signal, it automatically switches to the standby function.

Even though the LED is still illuminated, the subwoofer is in standby mode. This function can be easily checked by slowly increasing the volume at the receiver/amplifier. You will hear a quiet popping noise when the subwoofer activates itself as of a certain level.
What happens to the power amplifiers of the subwoofer if I don't connect the satellites?
As soon as the satellites are connected to the subwoofer and not to the AV Receiver/amplifier, the performance of the 6 or 8-channel power amplifier is distributed to the subwoofer and to the satellites.

If the satellites are not connected directly to the subwoofer but to the AV Receiver/amplifier via speaker cable instead, the subwoofer performance will increase somewhat; the power amplifiers for the satellites have no function. This enables the subwoofer and satellites to play even more dynamically than if the subwoofer still had to provide the satellites with performance.

The technical background: The subwoofer has a large transformer with a specific wattage. This performance is either distributed to the five satellites and the subwoofer, or you receive a higher performance only for the subwoofer.
How can I connect an additional active subwoofer?
If your receiver has only one subwoofer output ("Sub Out"), you only need a monocinch cable, which is then connected from the receiver to the "Sub In" of the subwoofer. With two subwoofer outputs, you can order a so-called Y-adapter from the Teufel accessories page, which has a cinch plug on one side and two cinch (RCA) sockets on the other. Connect the plug to the subwoofer "Pre Out" on the AV receiver/amplifier and connect the mono cinch cable to the two subwoofers.

If the cabling method is easier for you, then you can alternatively connect one subwoofer to the other. You will need two mono cinch cables - one to connect the subwoofer "Pre Out" on the AV receiver/amplifier to the left line-in input of the first subwoofer, and the other to connect the left line-out output of the first subwoofer to the left line-in input of the second subwoofer.
What's the deal with the so-called bass traps or bass absorbers?
These are usually cubic wood housings (same MDF material as the speakers) with a bass reflex opening that have no membranes and are tuned to a certain frequency (e.g. 40 Hz as for a subwoofer). The frequency to be co-ordinated can be changed by the length and diametre of the bass reflex channel. If, for example, a room has a room resonance frequency of 28.3 Hz and this frequency is also played back in addition by a speaker/subwoofer, the room will begin to resonate at this frequency. This particular frequency is played back amplified.

This can be imagined as droning or booming, which occurs during heavy bass movie scenes such as explosions or certain types of music (Jazz, pizzicato bass). The bass absorber is then tuned exactly to this frequency so that only the speakers/subwoofer play back this frequency. The resonance frequency from the room, which would amplify this frequency, is swallowed by the bass absorber.

If you would like to damp more than one frequency (a room usually has three different frequencies: ceilings and floors, front and back and left and right, and its multiple), you will have to set up three absorbers accordingly.
How is the wattage of a subwoofer with respect to the sine wave and pulse/music performance?
Mono subwoofer:

The wattage (e.g. "360 W") printed on the rear of the subwoofer near the mains plug designates the ability of the power amplifier "to pull" a maximum power rating in the specified range at the moment of switching on (those 360 watt stated as an example).

Consequently, the wattage must correspond to at least the sine wave output of the amplifier, as this sine wave output must be permanently available which the power pack must provide as well.

The pulse/music performance of the amplifier, on the other hand, can exceed the wattage, because the short pulses are buffered additionally by the capacitors in the power pack and are not achieved solely through the performance of the power pack.

Multi-channel subwoofer:

The wattage for a multi-channel subwoofer can also be below the sine wave output, as the specified sine wave output is not requested from every channel at the same time.

For a 5 x 100 watt sinus power amplifier, for example, each of the five channels is able to implement 100 watt sine. However, not all five channels at the same time! This is also unnecessary, as the same signal is never transmitted across all five channels at the same time, thus requesting the same high sine wave output per channel.

That is why the wattage may be, e.g. 300 watt, even if the sine wave output exhibits 5 x 100 watt (= 500 watt).
What are the volume switches for?
The sound of the speaker always depends on the room where it is located.

The volume of the active subwoofer can be controlled so that you can adapt the relationship between the active bass and treble / mid tones to suit the room.

Use your own senses to judge which settings sound best in your room. This switch is especially useful in stereo mode. On the other hand, multichannel amplifiers often have technologies that adjust the subwoofer volume - so when using a multichannel amplifier the controller should first be set at 0dB.
Which subwoofer cables does Teufel recommend?
Dans la mesure où dans un ensemble home cinéma les caissons de basses actifs sont connectés à la sortie Out du caisson de basses du récepteur AV, un câble supplémentaire pour la connexion des enceintes satellites est nécessaire. Pour les caissons de basses actifs nous proposons deux versions de câble mono RCA NF allant de 2,5m jusque 5m. Du reste, un adaptateur Y est également disponible dans nos accessoires. Le modèle „ 2 x mâles 1 x femelle“ permet un usage complet des entrées Line-In RCA droit et gauche au caisson de basses. Ainsi, la puissance du caisson de basses s’en voit augmentée. Le modèle „1 x mâle 2 x femelles“ permet la connexion de deux caissons de basses. Une sortie caisson de basses Pre-Out du récepteur se trouve en sommes doublée.
What is room resonance frequency?
Room resonance frequency (other terms: room modes, standing waves, resonance frequency) is the frequency at which the vibrations of a voice, a musical instrument or a signal played back over the hi-fi/home cinema system is amplified unnaturally, because the vibrations build up between the walls as well as the floor and ceiling.

It is calculated of the sound velocity divided by 2 and divided by the room length [ 340 m/s: 2 : 6 m = 28.3 Hz (=1/s) ] or, more simply: 170 divided by the room dimension (length, width or height). The greatest distance between two parallel walls is taken as first standard value. For a room of 4 x 6 metres, this would be 6 metres. Strictly speaking, you would have to calculate the room resonance frequency for further parallel walls (for the 4 metres and for the ceiling height).

Overlaying resonances are also possible if the room dimensions are very close to each other. (2.8 metres high, 3 metres wide and 5.6 metres long). The resonance at 2.8 metres is repeated as multiple (times 2) at 5.6 metres length, the resonance of the 3 metres width is close to the resonance of 2.8 metres. It would resonate strongly here at 30 Hz, 56 Hz, 60 Hz and 120/112 Hz.

Phenomena of resonance frequencies:

• For example, a man with a deep voice speaks in a very small room (2 by 2 metres, 85 Hz). The voice appears to have more emphasis than in another room or out of doors. As soon as a woman speaks, the voice will sound just the same as in another room.

• The voice of a woman or that of a small child will cause glass to shatter. The voice strikes exactly the tone that corresponds to the resonant frequency of the glass. The glass resonates so strongly that it shatters (refer to the movie "The Tin Drum").

• A group of soldiers march across a bridge in cadence. The equal movement causes the bridge to vibrate so much that it collapses. That is why no one marches across bridges in cadence.
What is the advantage of bi-amping/bi-wiring?
Bi-amping means that the speaker can be operated by two amplifiers at the same time, or by a bi-amping-capable AV receiver. This enables the different chassis (for the treble mid-tone and bass range) to be individually supplied with one signal. Among other things, this could increase the sound performance of a speaker.

Bi-wiring states that the corresponding speaker can be controlled at the same time with two different speaker cables, meaning via separated input sockets for the treble and mid-tone range on one hand, and for the bass range of the frequency switch on the other. This could improve the sound even more. Bi-wiring is the prerequisite for bi-amping.
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