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  • Concept R 2 "Concert 5.1"
  • Concept R 2 "Concert 5.1"
  • Concept R 2 "Concert 5.1"
  • Concept R 2 "Concert 5.1"
  • Concept R 2 "Concert 5.1"
  • Concept R 2 "Concert 5.1"
  • Concept R 2 "Concert 5.1"
  • Concept R 2 "Concert 5.1"

Concept R 2 "Concert 5.1"

More power, better sound and optimised design
Home cinema column speaker set in wenge wood patterns
Columa 300 Mk2 "5.1-Set L"
Order the new generation now.
To the new generation
  • 8 week trial
  • Up to 12 year guarantee
  • Free & easy returns

Highlights

Key advantages at a glance
  • Home cinema column speaker set in wenge wood patterns
  • Rich surround sound from slender speakers
  • 4 columns and 1 horizontal center, all identically equipped
  • 250 watt subwoofer with a 250 mm bass driver
  • Works with any AV receiver
  • Recommended for spaces up to 30 sqm.

Our Concept R 2 improves on the time-tested qualities of its predecessor, the Concept R, in three ways: more power, better sound and optimised design.

Setting new standards
The improved Concept R 2 is a complete 5.1 speaker set which combines exceptionally stylish design and massively impressive sound at an extremely low price! Offering such a stylish combination with brilliant sound at budget-friendly prices demonstrates the Teufel commitment to setting new standards in the home cinema market.
 
Home cinema intensity
The Concept R 2 set is composed of six elements: four columns with front and rear speakers, a centre channel speaker for voice and dialogue and an active subwoofer with 150 watt sine output power for bass. Fact: the new woofer has 50% more power than its predecessor, which was no slouch itself. This makes the Concept R 2 a perfect choice for living areas up to 30 sqm. With its powerful sound, the Concept R 2 guarantees intense home cinema enjoyment.
 
Versatile aesthetics
Featuring a beautiful blend of silver and black finish and wenge elements, the thin satellite speakers used in the Concept R 2 can easily compliment a wide variety of interior decorating styles - from a country look to 1970's retro. The magnetically insulated horizontal centre channel speaker ideally takes centre stage next to the TV, while the subwoofer is placed unobtrusively on the floor.
 
Crisp treble, harmonious sound
The column speakers employed in the Concept R 2 include a new 25 mm cloth tweeter for clear and crisp treble while the four cone drivers, each 80 mm in diameter, take care of the midrange, which is critical for high-quality voice and instrument playback. These four bass midrange drivers and the tweeter can also be found in the centre channel speaker, which means all the speaker boxes have a common chassis configuration to ensure harmonious and pleasing sound reproduction.
 
Detailed, smooth bass
The bass fundament is provided by a compact and low-profile subwoofer capable of reproducing both detailed and smooth bass or blasting heavy bass frequencies into the room with the full power of its 150 watt sine amplifier and the remarkable air displacement of its 250 mm chassis.

Surround sound at a low priceNever before has such astounding surround sound reproduction with Teufel quality been combined with exceptionally stylish design and made available at such a low price! The Concept R 2 means that passing up on a well-designed and great-sounding surround speaker system because of an expensive price tag is now a thing of the past.

Included components

  • Column Speaker CR 142 FR
  • Centre Speaker CR 142 C
  • Subwoofer CR 1420 SW

Specifications

Subwoofer CR 1420 SW
Subwoofer CR 1420 SW
The Concept R 2 subwoofer is responsible for the sub-bass in this system. Despite its compact size and discreet round design, this is a speaker that can really deliver intense deep bass when called upon.

This subwoofer owes its sub-bass skills to a 150 W RMS power amp and a generously sized 250 mm bass driver, which provides more than enough bass for typical listening rooms of up to 30 m2 in size.

The oval-shaped cabinet with convex side panels perfectly complements the well-rounded sound of the Concept R 2 subwoofer, making this speaker a real eye catcher as well.

Only available with Concept R 2.
Subwoofer CR 1420 SW
Speaker
Enclosure type Bassreflex
Magnetic shielding Yes
Electronics
Input gain adjustment Yes
Phase control 0/180
Output performance amplifier: Bass driver 250 W
Power output capacity sinus (RMS) Bass 150 W
Dimensions
Depth 36.50 cm
Width 33.00 cm
Height 43.00 cm
Weight 17.20 kg
Centre Speaker CR 142 C
Centre Speaker CR 142 C
The centre channel speaker in the Concept R 2 system is designed to be used horizontally below or above a TV. The magnetic shielding of this speaker makes it safe to use the CR 142 C near TVs with no risk of interference.

The all-wood Concept R 2 centre speaker contains four 80 mm mid-range drivers and one 25 mm fabric dome tweeter – the same drivers used in the front and rear speakers. Since all of these speakers are based on the same design, this provides for a very well balanced sound field.

Speaker cables with a diameter of up to 2.5 mm2 can be easily connected using the sturdy screw terminals. The table stand (included) provides a stable base for the speaker.

Only available with Concept R 2.
Centre Speaker CR 142 C
Speaker
Continuous power handling (IEC - Long Term) 80 Watt
Peak power capacity (IEC - Short Term) 140 Watt
Minimum amplifier output power recommended 20 Watt
Impedance 4 - 8 Ohm
Frequency range from/to 100 - 20.000 Hz
Crossover frequency to Woofer (recommended) 150 Hz
Acoustic principle 2-way-ystem with five chassis
Enclosure type Closed
Enclosure material Wood
Magnetic shielding Yes
Terminal clamps Screw grips (not suitable for banana plugs)
Maximum cable diameter 2.50 mm
Dimensions
Depth 8.70 cm
Width 50.00 cm
Height 16.20 cm
Weight 2.60 kg
Column Speaker CR 142 FR
Column Speaker CR 142 FR
The four identical 80 mm drivers are responsible for the balanced mid range in these slim, magnetically shielded column speakers in wooden cabinets, while the 25 mm fabric dome tweeters add air to the treble reproduction.

At a height of 113 cm, these satellites radiate at an optimum height and make additional stands or feet superfluous.

With their slim design, oval base measuring 31.5 x 21.5 cm and harmonious colour blend of silver, black or wenge elements, these speakers are easy to integrate in many interior designs.

Since all of the drivers are magnetically shielded, these speakers can be placed anywhere in the room without interfering with your TV.

Only available with Concept R 2.
Column Speaker CR 142 FR
Speaker
Continuous power handling (IEC - Long Term) 80 Watt
Peak power capacity (IEC - Short Term) 140 Watt
Minimum amplifier output power recommended 20 Watt
Impedance 4 - 8 Ohm
Frequency range from/to 100 - 20.000 Hz
Crossover frequency to Woofer (recommended) 150 Hz
Acoustic principle 2-way system with five chassis
Enclosure type Closed
Enclosure material Wood
Magnetic shielding Yes
Terminal clamps Screw grips (not suitable for banana plugs)
Maximum cable diameter 3.00 mm
Dimensions
Depth 8.70 cm
Width 16.20 cm
Height 113.00 cm
Weight 5 kg

Expert reviews

Concept R 2 "Concert 5.1" review of Mag'64
Concept R 2 "Concert 5.1" review of Mag'64
"Top quality for a small price!"
Mag'64 09/2008

The online magazine Mag’64 has tested the Concept R 2 and is back to us with an absolutely outstanding result:

"This set is more than suitable for a room of 30 m² plus or minus – a real handful! Our testing room is 25 m² and was flooded with sound in every corner in a nearly optimal way – it's amazing what a few columns and a powerful subwoofer can create. Whether tweeters, midrange or in the low frequencies: the Concept R 2 can do it all with a price on the ground floor and is an optically excellent all-round speaker set for the smaller budget.

A set that provides great sound ouput with fantastic results and once again exceeds the highest standards of the Berlin sound specialists. The Concept R 2 pumps out even the deepest basses, which always makes for a correspondingly deep vibration in the stomach area, and because of the great price and the outstanding quality we can highly recommend it with a light heart."


Read the entire test here! (German only.)
Concept R 2 "Concert 5.1" review of www.caseumbau.de
Concept R 2 "Concert 5.1" review of www.caseumbau.de
"In its price category, the Concept R 2 simply offers maximum audio potential!"
www.caseumbau.de 08/2008

Test:
In the DVD product segment, the Teufel Concept R 2 is completely convincing. Voices heard through the centre speaker are clearly discernible and the surround speakers are clean and clear in their delivery. The subwoofer generates clear and deep bass that you can feel as much as you can hear. The experience of watching the pod race on the THX Demo DVD was akin to sitting in a movie theatre. [...]

Even at high volumes, this set showed no signs of weakness – the surround speakers never began to rattle nor did the subwoofer distort. When listening at high volumes however, you should notch down the subwoofer level on the AV Receiver. After all, you don't want your neighbours to complain!

The Teufel Concept R 2 also passed the music test with flying colours. In stereo mode, singers sounded clear, instruments were well defined, and the bass frequencies were punchy. In fact, the Concept R 2 can easily hold a candle to more expensive speaker systems conceived solely for stereo playback. Dynamic passages and mid-range frequencies were both represented in finest detail.

Summary:
The Teufel Concept R 2 is an excellent yet highly affordable sound system that will please all home theatre fans. Whether you are after a full-blown cinematic experience with DVDs or just interested in listening to your favourite CDs, the Concept R 2 simply offers the maximum in sound quality for this price category. The workmanship is excellent – we were very impressed by the elegant wood design that truly has no peers in this price range. The sound quality is excellent for films as well as music.

Heard on the Teufel Concept R 2, voices were clear, special effects were dynamic, and the bass response was deep and powerful. Since the Concept R 2 showed absolutely no weaknesses in our test, we can confidently recommend this system. Given the performance, 12-year guarantee and price of € 399,-, this is truly an affordable set. Therefore, the Teufel Concept R 2 has received our Platinum Award.

Pros:
• Very good craftsmanship
• Very good performance / sound
• Looks great
• Fair price


Read the entire test here! (German only.)
Concept R 2 "Concert 5.1" review of stereoplay
Concept R 2 "Concert 5.1" review of stereoplay
"Our hearty recommendation!"
stereoplay 03/2008

More than other affordable systems, this is a visually impressive set that makes an unexpectedly sophisticated first impression. The oval surface of the cabinet is available in devilishly handsome faux wood veneers such as cherry or wenge.

With the Concept R 2, the Berlin-based designers have crafted a system with an exceptionally well-balanced frequency response. The response of the R 2 satellite speakers was largely balanced both when placed next to or away from walls. Indeed, the sound field completely freed itself from the column speakers and filled the room. The subwoofer response wasn't always as tidy, but it blended harmoniously into the entire listening experience. When playing bombastic soundtracks such as "Pirates of the Caribbean", the R 2 system did reach its limits at higher volume levels, and in some cases it was lacking in transparency and high-frequency "air".

Nonetheless, the overall sound of the Concept R 2 was agreeable and well-balanced. This is one of the few multi-channel sets in this price category that you can, and will want, to use to listen to your favourite music as well. It receives our hearty recommendation – besides, it looks great!

Test results:
Sound: Top of class
Price/performance: Outstanding

Concept R 2 "Concert 5.1" review of www.casemodding-palace.de
"Maximum sound"
www.casemodding-palace.de 01/2008

Once again, the speaker designers at Teufel have come up with an absolute top product. In its price category, the Concept R 2 simply offers maximum audio potential! Whether you long for the full-blown theatre experience while watching DVDs or that goose-bump feeling while listening to your favourite CDs, the Concept R 2 reproduces the audio clearly and accurately, with a merciless bass response (of course, this requires a suitable 5.1 receiver to be connected). Besides, with the 12-year guarantee and low price, it's impossible to resist an eye-catcher like this. And you just know that it is going to look great in your living room. Highly recommended!

• Elegant and high-quality design
• Clear audio quality from satellites
• Powerful subwoofer
• High-quality speaker cables included
• Long period of warranty
• Price

Overall rating: Gold Award


 


REVIEW OF PREDECESSOR SYSTEM: This review was completed for the predecessor system, Concept R.


Read the entire test here! (German only.)
Concept R 2 "Concert 5.1" review of HD TV-Praxis
"A fantastic product at an amazing price!"
HD TV-Praxis 09/2006

It's difficult to understand how Lautsprecher Teufel can offer their Concept R system at such a low price.

There are doubtless other speaker systems with a more lively response and somewhat more ‘warmth’ in the fundamental frequencies. But these systems all cost many times more than what you'll have to dish out for the Concept R. The look, feel and, most importantly, sound of Concept R is easily on par with speaker systems four times its price. Especially when it comes to playing 5.1 movies, this speaker system will knock your socks off.

Thanks to the analytical capabilities of these speakers, soundscapes dissolve into their separate components before merging back into a harmonious whole again. The Concept R has more than earned our product tip. This is a fantastic product at an unbelievable price!

Concept R 2 "Concert 5.1" review of www.gbase.ch
"A genuine highlight!"
www.gbase.ch 08/2006

Summary:

Quality at a price you can afford – this is what makes Teufel unique. The Concept R offers impressive proof that this is a maxim followed religiously by the Berlin-based loudspeaker makers.

Used in combination with a good AV receiver, home theatre purists can round out their home theatre with a fully-fledged speaker set without having to break the bank. All of the films and video games we tested on the Concept R 2 were much more enjoyable than before.

Moreover, the ordering and setup processes are truly painless and straightforward. Since we found nothing to fault during our tests, we can confidently state that this speaker set is one of our true highlights – at the very affordable price of € 345,-!


Read the entire test here! (German only.)
Concept R 2 "Concert 5.1" review of Teschke.de
Concept R 2 "Concert 5.1" review of Teschke.de
"Flexible and versatile"
Teschke.de 01/2011
"Teufel has made a big step with its Mediastation 6. The device handles all commonly-used video, audio and picture formats, offers thoroughly good picture and sound quality and is intuitive to use.    The buttons on the front of the player are practical in case the remote control isn't directly on hand. Most Mediastation 6 functions can be controlled from the player itself."

Pros:
+ Good picture and sound quality
+ Plays all commonly-used format
+ Good construction quality
+ Lots of connection terminals
+ Largely simple and intuitive DVB-T use Recording function and YouTube
+ connectivitiy can also be used without the remote control
+ Price-to-performance
Concept R 2 "Concert 5.1" review of Heimkino
Concept R 2 "Concert 5.1" review of Heimkino
"Home cinema media centre"
Heimkino 02/2011
"Teufel's Mediastation 6 streams pictures, video and music files from a home network, can handle DVB-T broadcasts, and can be connected to external sources and archival storage mediums. It connects to the Internet radio service Shoutcast and various Web 2.0 services."

Sound quality: (30%) 1,5
Practical (30%): 1,4
Configuration (30%): 1,4
Price-to-performance: Very good

+ 1 terabyte hard drive
+ Supports numerous formats

Overall: Very good (1,4)
Concept R 2 "Concert 5.1" review of DVD Vision
Concept R 2 "Concert 5.1" review of DVD Vision
"So much sound for so little money."
DVD Vision 13/2005

Teufel’s ace in the hole: Although it may be low in price, the Concept R 2 system could never be accused of lethargy or imprecise, lifeless playback. To the contrary, it knocked us off our feet. The overall spaciousness of sound, the excellent intelligibility of dialogue and the powerful subwoofer add a genuine cinematic flair to any home theatre.

Economical speaker systems may be known for their imprecise high frequency response, but this flaw is never encountered with the Concept R. Instead, these slender column speakers play lively and openly. Even when the volume's turned up far beyond room listening levels, the Concept R never sounds tormented and instead marches on fully undeterred. The SPL that can be handled by this system has doubtless set new standards in this price category, even though extreme loudness freaks are sure to be disappointed. Nonetheless, there’s never been this much sound for so little money.

Summary
The attractively designed, sitting room-compatible Concept R 2 is currently available for a ridiculously low € 345 in what is truly a sensational price offer. Especially when one considers that the sound quality is without a doubt on par with alternative systems that are two to three times more expensive. Congratulations to the team in Berlin!

Rating
• Sound: 4 / 5 points
• Maximum SPL: 4 / 5 points
• Features: 3.5 / 5 points
• Craftsmanship: 3.5 / 5 points
• Price/performance: Outstanding

Total rating: 4 / 5 points

Concept R 2 "Concert 5.1" review of Expert Reviews
Subwoofer CR 1420 SW
Concept R 2 "Concert 5.1" review of Expert Reviews
"Definitely worth the investment!"
Expert Reviews 08/2011
"You'll get a similar audio experience when watching movies from the less expensive Consono 25, but we think the extra cost is worth the upgrade for anyone looking to outfit a larger room with surround sound. The twin-driver satellites and larger subwoofer can produce more powerful and better balanced audio, which is perfect for both films and music.

Few 5.1 speaker systems cost less than this, and none that we've tested sound as good as this.!
http://www.expertreviews.co.uk/pc-speakers/1286608/teufel-consono-35
Concept R 2 "Concert 5.1" review of AV Magazin.de
Centre Speaker CR 142 C
Concept R 2 "Concert 5.1" review of AV Magazin.de
"Excellent"
AV Magazin.de 06/2011
"Teufel offers, with the Consono 15, a price-conscious possibilty to own your own outstanding sound. Thanks to the extremely compact measurements of this product you can place the tiny satellites throughout your room. It's quite seldome that entry into the home cinema world is so attractive."

Sound: good
Setup: good - excellent
Worksmanship: excellent
Price/performance: excellent

Downloads & support

Help regarding this product
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 speaker cables does Teufel recommend?
For smaller sets up to Theater 1, we recommend using the 2.5 mm² Teufel speaker cable for optimal sound quality if the required length does not exceed 15 metres.

For Theater 2 and larger systems, we recommend the Teufel cable with 4 mm² cross-section for the front/centre speakers, and the 2.5 mm² cable up to a length of 15 metres for the effect speakers.

Choose a higher cross-section for even greater lengths.
Is it possible to combine speaker cables with different cross-sections?
To supplement missing cable lengths you can use speaker cables of differing thicknesses without acoustical differences - provided there are no extreme differences in the cross-sections.
Should I rather choose a fully active or a partially active speaker set?
It is compulsory to connect partially active systems to an AV Receiver. This supplies the five to seven satellite speakers with the necessary power. Only the subwoofer works additionally with its own amplifier. The investment in a new system is higher because of the AV Receiver, but the solution is also much more flexible. After all, you can connect several signal sources, such as a TV, satellite receiver, PC, game console and MP3 player to an AV Receiver at the same time.

Fully active set do not necessarily need an AV Receiver. The five to seven satellite speakers here are supplied with power by the amplifiers which are installed in the subwoofer in addition to the subwoofer power amplifier. This saves you the costs of a receiver, but it is usually only possible to connect one source to our fully active subwoofer.

Exceptions here are the Concept E2, the Concept E Magnum Digital, the Motiv 5 Digital, the Concept F, the LT2+R and the Concept S+R.

Naturally you can also equip the fully active systems with an AV Receiver at a later point. The connection is then equal to the partially active sets.
Can I set up the set in a different way to that described?
The recommended set-up information below represents the best possible arrangement for perfect multichannel playback in your home. Your available space, your partner or your furniture may not always allow you to arrange the speakers in the ideal manner. Try to meet as many of the requirements as possible.

Modern AV Receivers offer numerous options for compensating electronically for any compromises in the set up. Generally speaking, the following rule always applies: you can always use our recommendations as a basis for experimenting with what works best for you, acoustically and optically. Let your ears (and eyes) decide!
Can the Concept R 2 replace a stereo system?
Yes.

The Concept R 2 is equally well suited to music reproduction and cinema sound. It can completely replace any standing stereo speakers. As a result of careful development of the satellites, we can guarantee stereo sound comparable with much more expensive (and, above all, bulkier) standing speakers.
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.
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