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Cinesystem Trios Easy "5.1-Set M"

The sound of Berlin
Ready-to-play, high-end 5.1 soundbar system with compact subwoofer
(1)
€ 1,599.99 € 1,199.99
incl. VAT
Color: titan
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 € 29.99 Shipment
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Highlights

Why we love this product
In the Easy Edition, the Trios soundbar comes with a smaller subwoofer, which fills rooms up to around 25 square metres with sound. The two rear speakers are controlled wirelessly. Discrete, visually appealing and sonically captivating, the system offers a true cinema experience from the comfort of your living room.
Home cinema systems Cinesystem Trios Easy "5.1-Set M"
Key advantages at a glance
  • Ready-to-play, high-end 5.1 soundbar system with compact subwoofer
  • Wireless rear speakers for discrete operation, optionally available as Set M or L
  • Integrated, powerful centre speaker for best possible speech intelligibility
  • Powerful subwoofer, can be used either front- or down-firing, optional wireless control
  • Powerful surround sound thanks to a total of 465-Watt power output, 22 drivers, 2-way system and Dynamore® technology
  • Bluetooth 4.0 with aptX® & NFC for wireless music streaming in CD quality
  • Made from elegant brushed aluminium for perfect integration into any living space
  • With TV remote control (HDMI/CEC), installation in seconds, integrated wall bracket
Cinesystem Trios Easy "5.1-Set M" review of Area DVD
"A first class surround sound system, elegant and sophsticated with a grandiose sound – Teufel rings in a new multichannel era with the Cinesystem Trios.”
Area DVD 14.12.2016
All test reviews
(5 of 5 from 1 Reviews)
All ratings
Features

Overview of our technologies

Bluetooth apt-X
plug & play
PC Gaming
HDMI 3D
Dolby
dts Digital Entertainment
Downfire
Dynamore
NFC
Dolby Pro Logic II
The Berlin trio

In the Easy Edition, the Trios surround soundbar comes with a smaller subwoofer, which fills rooms up to around 25 square metres with sound. The two rear speakers are controlled wirelessly. Discrete, visually appealing and sonically captivating, this system turns your living room into a real home cinema.

2-way system reproduces warm, detail-rich sound, 465 watt power output for filling even larger rooms with sound
Authentic 5.1 surround sound with wireless rear speakers
Soundbar Cinebar Trios Teufel
 
 
 
 
 
Dynamore® Technology creates an especially broad soundstage
Extremely broad dispersion angle reaches every listener in the room
Intelligent design cools without fans for noiseless operation
Dynamore

Dynamore technology, developed by Teufel, offers an astonishing surround sound via side-firing speakers without the need for additional rear speakers.

Setup

Connect the soundbar to your television with a single HDMI cable. No additional devices like amplifiers or AV receivers are required. The soundbar comes with integrated brackets and cable channels for easy wall mounting.

Bluetooth

The system’s Bluetooth makes it possible to stream music in CD quality from your smartphone, tablet, PC or Mac. Audio from Spotify, YouTube, iTunes, Facebook and your favourite podcast apps can be effortlessly enjoyed as immersive sound. NFC technology connects your source device to the Cinesystem in seconds.

Remote control

The Cinebar Trios can be controlled with its own included remote or a standard TV remote. No extensive configuration or programming is required.

The Cinebar Trios’ aluminium remote with rounded corners matches the soundbar and is a nice addition to any coffee table.

More is more

The Cinebar Trios supports all standard sound formats, offers a lip sync function and a variety of sound settings as well as HDMI CEC and ARC.

Aluminium

The soundbar’s enclosure is completely fashioned from brushed aluminium, an expensive material prized in loudspeaker construction for its light weight and low resonating qualities combined with excellent strength and stability.

Wireless 5.1 sound
The subwoofer and rear speakers provide a wireless transmission. All you need is a power outlet in the rear area. You won't have to worry about laying cables across the room. The subwoofer and rear speakers turn on and off automatically.
Teufel Trios Stereo-Lautsprecher Speaker
T 8 Subwoofer

For the first time Teufel offers a subwoofer that can be used either front- or down-firing. Don't let the 100-Watt power output fool you. The new Class-D amplifier works efficiently and is extremely low-noise. It easily matches up to classic amplifiers that require 250-Watts.

  • High-end active subwoofer, can be used either front- or down-firing
  • 200 mm diameter bass driver
  • Power: 100-Watt, Class-D power amplifier with high efficiency and low consumption
  • Automatic on / off
  • Extensive setting options and protective circuitry
  • Can be tilted forwards or backwards, feet are interchangeable
  • Integrated wireless module - works with Teufel Soundbar Streaming, Trios, Duett, One, Cinebar Pro, CoreStation and Impaq.

Included components

  • Soundbar CS 42
  • power cable
  • Remote Control CS 42 RC
  • Satellite Speaker L 430 FCR (pcs.)
  • T 8 Subwoofer
  • RearStation Compact RX (pcs.)
  • 15 m Speaker Cable 1.0mm² - C1015S

Technical Data

Soundbar CS 42
Soundbar CS 42
 High-class 3.1 soundbar
Soundbar CS 42
Speaker
Continuous power handling (IEC - Long Term) 45 Watt
Peak power capacity (IEC - Short Term) 60 Watt
Maximum sound pressure level 104 dB/1m
Frequency range from/to 130 - 20000 Hz
Tweeter (number per enclosure) 3
Tweeter (diameter) 20.00 mm
Tweeter (material) Silk
Midrange driver (number per enclosure) 6
Midrange driver (diameter) 77.00 mm
Midrange driver (material) Coated cellulose
Acoustic principle 2-way system
Enclosure type Sealed
Enclosure material Aluminium
Enclosure surface Brushed aluminium
Net internal volume 7 Litres
Integrated stand Yes
Wall mounting brackets Yes
Keyhole plate mounted Yes
Connections
aptX Yes
Bluetooth Yes
Bluetooth Bluetooth 4.0 aptX
NFC Yes
Digital inputs optical 1
Stereo jack 3.5mm - in 1
Bass driver output 1
Video inputs- HDMI 1
Video inputs- HDMI Yes
HDMI Version 1.4b
Video outputs - HDMI 1
Video outputs - HDMI Yes
Miscellaneous HDMI CEC
HDMI ARC
4K passthrough
3D video support
USB 2.0 per software update
Playback
DTS NEO:6 Yes
Dolby Digital Yes
DTS Yes
Dolby Pro Logic Yes
Dolby Pro Logic II Yes
Electronics
Dynamore® Yes
Amplifier technology Class D
Amplifier configuration 3.0
Amplifier channels 6
Power output capacity impulse (peak) Satellite 55 W
Power output capacity sinus (RMS) Satellite 75 W
Power supply voltage 230 volts
Standby-Function Yes
Standby-Power consumption 0.40 watt
Maximum power consumption 225 watt
Safety class 2
Storage for settings when disconnected Yes
Automatic on/off Yes
Display Yes
OSD Yes
Integrated DSP Yes
Audio-Digital-Analog-Converter 24 Bit/96 kHz Cirrus Logic
Infrared remote control Yes
Materials Aluminium
Dimensions
Depth 9.80 cm
Width 115.00 cm
Height 9.30 cm
Weight 6.50 kg
Miscellaneous Total height with table stand is 11.70 cm
Satellite Speaker L 430 FCR (pcs.)
Satellite Speaker L 430 FCR (pcs.)
The L 430 FCR are high-performance hi-fi short column speakers made from aluminium. Their sound is identical to that produced by the L 430 C and L 430 FR.
Satellite Speaker L 430 FCR (pcs.)
Säule Yes
Speaker
Continuous power handling (IEC - Long Term) 70 Watt
Peak power capacity (IEC - Short Term) 100 Watt
Sensitivity (2.83 V / 1 m) 86 dB
Minimum amplifier output power recommended 20 Watt
Maximum sound pressure level 101 dB/1m
Impedance 4-8 Ohm
Frequency range from/to 135-20000 Hz
Crossover frequency internal switch 450/2800 Hz
Crossover frequency to Woofer (recommended) 120 Hz
Tweeter (number per enclosure) 1
Tweeter (diameter) 19.00 mm
Tweeter (material) Fabric
Midrange driver (number per enclosure) 2
Midrange driver (diameter) 80.00 mm
Midrange driver (material) Paper, coated
Woofer (number per enclosure) 2
Woofer (diameter) 80.00 mm
Woofer (material) Paper, coated
Acoustic principle 3-way system
Enclosure type Sealed
Enclosure material Aluminium
Enclosure surface Brushed
Wall mounting brackets Yes
Keyhole plate mounted Yes
Terminal clamps Pole terminals, gold-plated
Suitable for banana plug Yes
Maximum cable diameter 2.50 mm
Suitable for AV receiver Yes
Dimensions
Depth 9.60 cm
Width 9.10 cm
Height 46.50 cm
Weight 2.50 kg
RearStation Compact RX (pcs.)
RearStation Compact RX (pcs.)
The RearStation Compact wirelessly transmits audio signals from source to speaker. Simply plug in the RearStation Compact to mains power and then to the rear speakers.
RearStation Compact RX (pcs.)
Speaker
Terminal clamps Loudspeaker terminals
Maximum cable diameter 1.50 mm
Connections
Cinch input 1
Electronics
Amplifier technology Class D
Amplifier configuration 1.0
Amplifier channels 1
Power output capacity impulse (peak) Satellite 80 W
Power output capacity sinus (RMS) Satellite 60 W
Power supply voltage 230 volts
Standby-Function Yes
Standby-Power consumption 0.40 watt
Maximum power consumption 80 watt
Storage for settings when disconnected Yes
Automatic on/off Yes
Miscellaneous Crossover freqency: 2.4 GHz
Dimensions
Depth 4.20 cm
Width 7.10 cm
Height 18.30 cm
Weight 0.30 kg
T 8 Subwoofer
T 8 Subwoofer
 High-end active subwoofer, can be used either front- or down-firing
T 8 Subwoofer
Speaker
Maximum sound pressure level [dB/1m] 111
Frequency range from/to [Hz] 33-200 Hz
Woofer (number per enclosure) 1
Woofer (diameter) [mm] 200
Woofer (material) Aluminium
Acoustic principle 1-way system
Enclosure type Bass reflex, DPU
Enclosure material MDF
Enclosure surface Matte coated
Equalisation openings 1
Integrated stand Yes
Miscellaneous Reflection channel in DPU technology avoids flow noises, stable MDF housing structure with internal bracing
Suitable for AV receiver Yes
Connections
Cinch input 1
Miscellaneous Suitable for installation directly on the wall
Electronics
Miscellaneous Can be wirelessly controlled
Lowest frequency (-3 dB) [Hz] 37
Bass boost/EQ Yes
Input gain adjustment Yes
Frequency regulator (range) [Hz] 37 - 200 Hz
Level control Yes
Phase control Yes
Miscellaneous Can be used either front- or down-firing
Amplifier technology Class-D
Amplifier configuration 1.0
Amplifier channels 1
Power output capacity impulse (peak) Bass [W] 100
Power supply voltage [volts] 230 Volt
Standby-Function Yes
Standby-Power consumption [watt] 1
Maximum power consumption [watt] 100
Mains lead fixed Yes
Safety class 2
Fuse Yes
Storage for settings when disconnected Yes
Automatic on/off Yes
Dimensions
Depth [cm] 38
Width [cm] 31.1
Height [cm] 42.3
Weight [kg] 11

Accessories

Accessories and bundle packages are not currently available for this product.

Expert reviews

Cinesystem Trios Easy "5.1-Set M" review of Area DVD
Cinesystem Trios Easy "5.1-Set M" review of Area DVD
"A first class surround sound system, elegant and sophsticated with a grandiose sound – Teufel rings in a new multichannel era with the Cinesystem Trios.”
Area DVD 14.12.2016
"A first class surround sound system, elegant and sophsticated with a grandiose sound – Teufel rings in a new multichannel era with the Cinesystem Trios.”

Conclusion:

"A new era of multichannel solutions was introduced some time back by names like Sonos, Samsung and Panasonic. A soundbar in front with wireless connection to surround speakers and a wireless subwoofer. In this way, one can listen to multichannel sound without the cable chaos or a big AV receiver. Teufel might be a bit late to the party, but it takes the concept to new acoustic heights. Not cheap speakers these, but rather elegant & sophisticated high-end aluminium columns in the back. No booming plywood box or low-performance designer piece, but rather a solid, sleek and extremely high-performance subwoofer. The general setup could hardly be better. Of course, the main character in all this also has to deliver a convincing performance, and that it does without fail: The Cinebar C 42 3.1 soundbar delivers an outstandingly well-structured soundstage, and, thanks to Dynamore, a first class and convincing sense of spatial depth.”

Note: The test review is for the Cinesystem Trios "5.1 Set L“

Translated from the original German.




You can read the full test review (in German) at www.areadvd.de
Cinesystem Trios Easy "5.1-Set M" review of Heimkino Magazin
Cinesystem Trios Easy "5.1-Set M" review of Heimkino Magazin
"...this is a basic recipe for first class home cinema."
Heimkino Magazin 02-03/2017
"The Trios Set made an excellent impression in the stereo mode from the word go. The slender components delivered an uncommonly powerful sound that accurately reproduced music from top ten hits to baroque. The tone leaves no room for complaint and the finely detailed sound surprises even critical ears.”

"When it comes to a 5.1 signal, things really get started. In spite of the soundbar’s compact dimensions, the sound was effortlessly separated from the speakers and presented in the room as a broad and well-defined soundstage.”

"This subwoofer is also stunning! It has no problem accurately reproducing thunderstorms, the bass is spot on. It delivers distortion-free levels up to unhealthy volumes and the sound comes across with precision without booming.”

Conclusion:

"A good soundbar that comes with full-fledged rear speakers and a potent subwoofer – this is a basic recipe for first class home cinema. Teufel’s re-interpretation with premium components and wireless operation turned out to be absolutely timeless. All-in-all, the incredible features and first class sound make the 5.1 set an absolute highlight.”

Note: This test review is for the Cinesystem Trios 5.1 Set L"

Translated from the original German.




You can read the full test review (in German) at http://www.heimkino-magazin.de/
Cinesystem Trios Easy "5.1-Set M" review of SFT Magazin
Cinesystem Trios Easy "5.1-Set M" review of SFT Magazin
"... remarkable panorama soundscape, which is complemented by the two rear speakers for a neat surround setup"
SFT Magazin 01/2017
"Teufel distributes the drivers in its soundbar as far apart as possible for a wide-ranging soundscape, and improves the overall performance with a software update. The result: the Cinebar produces a remarkable panorama sound stage, with two rear speakers that perfectly complement the neat little surround sound set-up."

"There is hardly anything to complain about with regard to the individual categories 'frequency control' and 'distortion-free playback'. The components do not overreach with shrill effects or deep bass inserts, and the naturalness of speech remains fully preserved." "Even for music, the system turns out to be useful [...]."

Conclusion:

"The Berliners have delivered a cinematic system that takes up little space, is far ahead of other soundbars in terms of space, and makes use of wireless technology."

Note: This review applies to Cinesystem Trios-Set L.
See full review at pcgames.de/Technik
How our customers rated this product:

Downloads & support

Help regarding this product
My Bluetooth speaker produces a lesser quality sound with my Windows PC or laptop.
It could be that the speaker is connected as a device with speakerphone function. Please go to: settings menu > devices and printer > BOOMSTER (or other Bluetooth device). Right click on the device and remove the check mark next to the “speakerphone” option.
The RAMPA insert at the bottom of the speaker sometimes is turned out with the tamping screw. What can I do about that?
Unscrew the tamping screw from the Rampa insert and screw the Rampa insert back into the bottom of the speaker.
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.
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.
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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