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  • Onkyo TX-RZ820
  • Onkyo TX-RZ820
  • Onkyo TX-RZ820

Onkyo TX-RZ820

Commander
Top-of-the-range 7.2-AV receiver with 180-Watt power output per channel
  • 8 week trial
  • Up to 12 year guarantee
  • Free & easy returns

Highlights

Why we love this product
With THX certification, the Onkyo TX-RZ820 receiver offers an entry into the high-end class of home audio. The receiver is the perfect companion for e.g. the System 4.
Key advantages at a glance
  • Top-of-the-range 7.2-AV receiver with 180-Watt power output per channel
  • Suitable for home cinema sets such as Ultima, Theater, LT 5, System 4, etc.
  • Supports Dolby True HD, Dolby Atmos, DTS:X, DTS-HD Master Audio and many more.
  • Music streaming with Bluetooth, AirPlay, TuneIn, Deezer, Spotify, Chromecast built-in, TIDAL
  • HDMI with support for 4K/60 Hz, HDCP 2.2, 3D Ready
  • HDMI-inputs: 8, HDMI-outputs: 2
Features

Overview of our technologies

Flare connect
HDCP 2.2
WiFi Certified
Bluetooth
Dolby Atmos
Dolby Vision Compatible
THX Certified
Chromecast built-in
Deezer
Spotify Music Streamingdienst
TIDAL
Tunein
PC Gaming
AirPlay
Dynamic Audio Amplification
AccuEQ
dts Play-Fi music is home
dts-HD Master Audio
dtsX
High-Res Audio
App
Onkyo AV-Receiver

No matter what you want to hear or see, the Onkyo receiver delivers everything in superb sound: music, games and, of course, movies. All settings are simple and easy to make. It's the perfect match for your Teufel sound system.

Bluetooth
Deezer
Tunein
Tidal
AirPlay
AccuEQ
App
HDCP 2.2
dtsX
High-Res Audio
Dolby Vision Compatible
Dolby Vision Compatible
Dynamic Audio Amplification
dts Play-Fi music is home
WiFi Certified
WiFi Certified
Dolby Atmos
 
Bluetooth
Bluetooth
Connect iOS, Android or Windows Phone smartphones wirelessly to the receiver and stream music.
 
AirPlay
AirPlay
Stream music and videos from Apple devices wirelessly over the receiver.
 
Deezer
DEEZER
Streaming service with millions of songs, playlists and radio stations at the touch of a button.
 
Tunein
TuneIn
Thousands of local and international radio stations.
 
Tidal
Tidal
Streaming service for high quality music.
 
THX
THX Select™
The THX standard is a seal of approval for particularly high-calibre sound experiences in film sound and music.
 
WiFi Certified
Wi-Fi certified
The receiver can connect to the local Wi-Fi if desired.
 
AccuEQ
AccuEQ
Integrated measuring system that can compensate for an unfavourable positioning of the speakers, for example.
 
Dolby Atmos
Dolby Atmos
The procedure assigns an individual signal to each speaker. An impressively realistic sound experience is achieved with upwards-radiating speakers, whose sound waves reflect off the ceiling and then return to the listener.
 
High-Res Audio
Hi-res audio
High-resolution broadcast audio formats such as FLAC or WAV with a sampling rate of up to 384 kHz and a word width of up to 32 bits can be played back with the receiver.
 
High-Res Audio
Chromecast built-in
Chromecast built-in – formerly Google Cast – is a technology that makes it possible to stream music service apps to Wi-Fi speakers or receivers. Streaming can be controlled via an extensive selection of Chromecast-supporting apps installed on smartphones, tablets or laptops. The Chrome browser can also be used directly for the control.
 
dtsX
dts:X
Competing format to Dolby Atmos with which sound signals can also be counteracted via high-frequency loudspeakers.
 
Dynamic Audio Amplification
Dynamic audio amplification
Adjusts the power consumption to the respective volume level.
 
dts Play-Fi music is home
dts Play-Fi
App to play music.
 
App
Onkyo controller
App for music playback and receiver settings.
 
Dolby Vision Compatible
Dolby Vision
A format that supports images with up to theoretically 12 bit color depth and can therefore counteract colour bending.
 
Flare connect
Fire Connect
A technology that allows Onkyo and Pioneer to play music in all rooms of the house.
 
VLSC
Vector Linear Shaping Circuitry (VLSC)
Conventional D/A converter methods reduce interference pulses during D/A conversion, but cannot completely eliminate them. By contrast, the VLSC (Vector Linear Shaping Circuitry) technology developed by ONKYO effectively eliminates interference components. As a result, you get virtually true-to-original analogue signals from your digital sources that reveal even the most subtle audio features.
 
HDCP 2.2
HDCP 2.2
This is a digital copy protection which is used especially for UHD-Blu-rays. All devices in an AV chain (player, AV receiver and beamer or TV set) must have an HDMI connection with HDCP 2.2 to ensure smooth playback.
What is THX?
THX is the industry standard for movies and music. It guarantees a high-quality sound experience so you don't miss anything the sound engineers put in.

Loudspeakers with THX certification guarantee the following:

  • 3 identically constructed & tuned front loudspeakers for homogenous and precise sound reproduction
  • Maximum noise reduction at high volumes for a consistently clean and detailed tone
  • An almost completely linear frequency response for extremely accurate sound reproduction
  • Wide dispersion along a broad horizon that reaches more listeners
  • Distortion-free high volumes for authentic sound reproduction

Included components

  • Onkyo TX-RZ820
  • FM antenna
  • remote control for Onkyo Receiver RC-911
  • MW frame antenna
  • MW frame antenna

Specifications

Onkyo TX-RZ820
Onkyo TX-RZ820
Download Datasheet: [PDF]
Onkyo TX-RZ820
Connections
Audio inputs- HDMI 6
Audio outputs - HDMI 2
Chromecast built in Yes
FireConnect Yes
FlareConnect Yes
Bluetooth Yes
Bluetooth 1
Wifi Yes
Wifi 1
LAN Yes
LAN 1
Digital inputs coaxial 1
Digital inputs optical 2
Cinch input stereo 7
Cinch output stereo 2
Cinch output 7.1 1
Headphone output 3,5mm 1
Video outputs - HDMI 2
Video inputs- composite 1
Video inputs- components 1
Video inputs- components 1
USB 2.0 1
iPod / iPhone AirPlay
Playback
VLSC Yes
Dolby Atmos Ja
Dolby Vision Compatible Yes
HDCP 2.2 Yes
dts Play-Fi Yes
DTS-HD Master Audio Yes
DTS:X Yes
MP3 Yes
WAV Yes
FLAC Yes
Dolby TrueHD Ja
Miscellaneous Dolby Surround Upmixing
Radio
Internet radio Yes
Station memory positions 40
FM - UKW Yes
AM - MW Yes
Electronics
WiFi Certified Yes
Dynamic Audio Amplification Yes
Automatic measuring AccuEQ
Total power output capacity (RMS) 650 Watt
Bi-amping Yes
Multi-room Yes
Power supply voltage 230 volts
Standby-Function Yes
High-Res Audio Yes
Remote control Infrared
Miscellaneous zusätzlich Onyko App
Dimensions
Depth 39.50 cm
Width 43.50 cm
Height 20.15 cm
Weight 14 kg

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 iTeufel Air can't connect to my home network. What do I do?
Check that your password doesn't contain any special characters.
The AirPlay connection to my iTeufel Air is constantly being disrupted. What can I do?
Your WLAN may be set to transmission channel 13. This channel is only used within Europe. In some cases, devices that were developed for other countries are not supported by this channel.

Solution: Change the transmission channel on your WLAN router. We recommend channel 11.
What is AirPlay?
AirPlay technology from Apple allows you to stream your iTunes to an AirPlay-enabled playback device such as the iTeufel Air. In this way, each and every song, album, and playlist from your iTunes music collection can be conveniently accessed at the touch of a button.

Playback can be directed from an iPhone, iPod touch, iPad, or PC. If iTunes is installed on a PC or Mac, it is even possible to stream audio files to mulitple devices simultaneously for multiroom plackback.

AirPlay can be used with either WLAN, an ethernet connection, or a combination of both.
Do I need a THX amplifier for the THX speakers?
Not necessarily!

The receiver/amplifier must have bass management where the frequencies are distributed for the THX front/centre speakers and the THX subwoofer (cut-off frequency 80 Hz).

Also, the amplifier should exhibit a minimum rating of 100 watt per channel and match the speakers for performance (amplifier sine wave output = approx. long-term load of speaker).
Are THX speakers suitable for listening to music?
Of course.

Since THX speakers are optimised to play back multi-channel signals (4 or 5.1 channels), the front speakers permit the precisely staggered and very true to detail spatial playback, while the surround speakers ensure realistic room characteristics.

Both are also ideal requirements for playing back music.
Is THX compatible with Dolby Digital and DTS?
Absolutely!

The objective of THX home cinema systems is to play back film soundtracks with as much authenticity and quality as the original mix from the sound studio.

In all studios used for film dubbing, the soundtracks are mixed in a 4-channel version (Dolby Surround) and in a 5.1 channel version. The acoustics, equalizer settings and speaker configurations are absolutely identical.

THX systems are thus always able to play back soundtracks produced in this way absolutely true to the original. Because of the high technical and tonal requirements, the THX standard can be compared with the TÜV (German Technical Control Board) for cinema sound.

As opposed to the THX quality standard, DTS and Dolby Digital are procedures for compressing sound data.
What is so special about a THX System?
THX systems are the ultimate home cinema components.

All THX-licensed devices and speakers must demonstrate certain technical properties so that they can play back movie soundtracks produced for cinemas and correspondingly powerful cinema sound systems absolutely true to the original for home cinemas as well. This is only possible up to a certain point with conventional hi-fi systems.

The most important requirements for excellent home cinema sound are:

• That despite the considerable size difference between cinemas and home cinemas, the movie soundtrack can be played back in comparably smaller rooms with the correct tonal balance and three-dimensionality.

• That all sound channels are played back very precisely despite the complexity of a multi-channel soundtrack to be able to precisely locate and allocate all noises and voices.

• That the subwoofer is perfectly coupled to the main speakers.

• That the front speakers are (by sound) identical - indispensable for harmonious sound playback.

THX systems satisfy these requirements perfectly, as they consider all running processes concerning playback while the movie soundtrack is being mixed.
What are the differences between THX Ultra 2, THX Select and THX Multimedia?
THX is a quality standard that guarantees the best possible playback for a specific room size. Since THX was originally developed for cinema theatres, the specifications apply to room sizes that far exceed the average living room size.

THX currently differentiates three standards for speakers: THX Ultra 2, THX Select and THX Multimedia.

THX Select 2 only applies to AV Receivers/amplifiers.
THX Ultra 2 corresponds to the earlier THX with the uncompromising design of the components.

Comparison of the three THX standards:

Front speaker
• THX Ultra 2: Angle of radiation and frequency response strictly limited requirement, D'Appolito arrangement of speaker systems prescribed.
• THX Select: More generous specifications for angle of radiation and frequency response.
• THX Multimedia: Radiation behaviour corresponds to THX Select.

Surround speaker
• THX Ultra 2: Dipoles are compulsory.
• THX Select: Dipoles recommended, but not compulsory.
• THX Multimedia: Direct emitters in every respect.

Subwoofer - transfer frequency

• THX Ultra 2: 80 Hz
• THX Select: 100 Hz
• THX Multimedia: 130 Hz

Volume level

• THX Ultra: Continuous load 105 dB (front) / 102 dB (surround).
• THX Select: Short term load 105 dB (front) / 102 dB (surround).
• THX Multimedia: 103 dB at the listening location/desk at approx. 50 cm distance.

Performance profile

• THX Ultra 2:
More output performance than normal AV Receivers. Complies with the strictest requirements for minor background noise and minor distortion. Is designed for performance needs of large listening rooms up to 150 m².
• THX Select:
Structure of AV Receiver is simpler and thus more reasonably priced. Less performance required, therefore suitable for smaller and medium-sized listening rooms up to approx. 50 m².
• THX Multimedia:
Pure PC and/or multimedia speakers for use at the computer.

Speaker set-up

• THX Ultra 2: Arrangement and set-up strictly regulated.
• THX Select: Set-up and arrangement simpler and more flexible.
• THX Multimedia: Set-up of front speakers on the desk, rear speakers to the side and behind where you are sitting.
How can I upgrade my THX system to a 7.1 sound format?
With the THX 7.1 amplifiers/receivers, there is always the option of connecting two rear centre speakers. We would also recommend using four rear speakers. Due to the elaborate development of our rear speakers, our models can be used very flexibly for any application. Here we have to differentiate as follows: - You have a THX Select/Ultra 2 device and want to connect two rear centre speakers: if you already use dipoles or direct radiators in your 5.1 system, you have the choice of adding either two more dipoles or two direct radiators as rear centres. For wall mounting and/or at a short distance from seat to rear wall (less than 1.00 m), we would recommend dipoles that are also operated in dipole mode (for System 4 THX, for example, order 2 x additional S 400 D). As soon as you want to place the speaker on stands or on a shelf, we would recommend direct radiators (for System 4 THX, e.g. order 2 x additional S 400 FCR). As soon as you already use direct radiators with your 5.1 system, we would recommend the same type of direct radiators for the upgrade. You have a THX Ultra 2 unit and want to connect two rear centres: a circuit especially developed for THX Ultra 2 devices allows you to use two more direct radiators or two more dipoles in addition to the dipoles used as rear effect loudspeakers.
I want to save a Chromecast stream on the direct selection keys (not applicable to all devices). How can I do this?
For technical reasons, it is not possible to store Chromecast streams on the direct selection keys.
One advantage of streaming with Chromecast is that you can continue to use your usual music app. How can I check if my apps already support Chromecast?
Chromecast built-in already supports 100+ apps, including many popular music services, and works with the Chrome browser. You’ll find an exact overview of all Cast-enabled apps here:

https://www.google.com/intl/en_us/chromecast/built-in/apps/

Tip: If you didn’t find your app on this list, you may want to contact the provider directly and ask when Chromecast will be integrated. In the meantime, you should have no trouble finding an alternative from the large selection of Chromecast-enabled apps.
Ich habe eine eigene Sammlung von Musik mit hoher Qualität und möchte diese über eine Chromecast unterstützende Musik-App abspielen. Wieso werden mir die Titel nicht anzeigt?
Chromecast built-in can stream CD-quality audio up to 48 kHz. If your collection has a higher sampling rate, you can stream it via the Teufel Raumfeld App.
I also want to use Chromecast's multi-room function and stream to multiple speakers at the same time. How can I do this?
Multi-room streaming is also possible with Chromecast. To do this, create a grouping of speakers within the free Google Home app which you will need to install on your smart device. You can name created groups on the app.

After you create and name your groups, they will appear alongside individual Cast-enabled speakers in your music app.

Google Home App (Play Store)

App Store iOS
I use the Spotify app to stream to my speakers. I don't see any or not all of my Chromecast speakers under "Available devices". What could be the reason?
In order to stream with Chromecast built-in, you’ll need the most recent version of the Spotify App. We recommend updating your app and trying again. Please note that you will also require a Spotify premium account in order to stream to your speakers.
I like watching YouTube videos. Can I now use Chromecast to wirelessly output the sound of YouTube videos while watching them?
The wireless transmission of audio content from YouTube is possible with the following:

1: A computer running on either the Windows 10/8.1/8/7 32 bit, Mac OS X 10.9 (or higher) or Linux operating systems.

2: A current version of the Chrome browser. You can download the most recent version here:
https://www.google.com/intl/en/chrome/browser/desktop/

3: The Chromecast built-in extension for the Chrome browser (if not already integrated)

4: A least one Teufel Streaming device with Chromecast built-in registered to the same Wi-Fi network as the computer using the Chrome browser

Begin a YouTube video. Select the “streaming” option from the “more” menu in the Chrome browser. This will call up a menu displaying all Teufel Streaming devices in the network that can play back the audio.

Restrictions:
  • The video displayed on your screen and audio from your speaker may not be in perfect sync.
  • It is not currently possible to directly cast audio from the YouTube app for iOS or Android.

Tip for Android users: You can stream audio from the YouTube app on Android devices using the Android mirroring function. To do so, simply complete the following steps:

Step 1: Install the “Google Home App” and open the menu on the left side.

Step 2: Tap on the option “Screen/Audio streaming” and select the Teufel Streaming device you wish to cast audio to. An active connection will be displayed in your smartphone’s status bar.

Unfortunately, this option is not currently available for smart devices operating on iOS systems.

Step 3: Switch back to the YouTube App and start a video as you normally would. The audio will play from the Teufel Streaming device you just selected.

Please note that the picture and audio may not be in perfect sync.
Ich streame Musik direkt aus dem Chrome-Browser. Die Wiedergabe ist jedoch manchmal verzerrt oder setzt kurz aus. Was kann ich dagegen machen?
The most frequent cause of distortion and drops in playback is insufficiently fast data transfers from the PC to the WiFi speaker. Data transfer rates can be affected by the WiFi router and the internet connection. We recommend enhancing the performance by increasing the WiFi signal strength in the vicinity of your PC and speaker.
Ich verfüge über eine sehr große eigene Musiksammlung. Seit ich das Update mit Chromecast built-in durchgeführt habe, reagiert das System öfter nicht. Was kann ich dagegen unternehmen?
The processing of a large number of music files requires Teufel Streaming system resources. This is normal and comparable to a computer that has multiple programs running at the same time. For most music libraries, this does not pose a problem. For exceptionally large libraries, however, such as those in the terabyte range, the system might be strained to a point where normal streaming is compromised.

Solution: Restart all Teufel Streaming devices and deactivate Chromecast built-in.
Der Stream auf meine Teufel Streaming Geräte über Chromecast beginnt erst nach langer Wartezeit oder startet gar nicht. Woran kann das liegen?
There are many possible reasons why your music stream doesn’t start or only begins after a long delay. The following are the most common causes:

1) Chromecast built-in functionality can vary between providers. It’s therefore important to abide by the instructions given by the provider for using this technology. For instance, some request that users first cast and then start an audio stream while others recommend the reverse order of actions. If you are unsure whether you are casting correctly, please ask your app’s service team for assistance.

2) It can take around 20 seconds or even longer in some cases for a stream to be processed. Contact the provider of the music or audio service you use to learn more.
How can I tell if my Teufel Streaming/Raumfeld devices are compatible with Chromecast built-in?
Chromecast is supported by Teufel Streaming / Raumfeld devices which have a Raumfeld logo on the front panel and no external Wi-Fi antenna on the rear panel. Chromecast is also supported by the Raumfeld Soundbar / Sounddeck and the Teufel Sounddeck Streaming / Teufel Soundbar Streaming.
Wie kann ich das Chromecast built-in für aktivieren?
Chromecast built-in can be activated on your Teufel Streaming device once it has updated its firmware to version 1.60 and actualised the Teufel Raumfeld App (iOS/Android). The app will then automatically display the presence of Chromecast-enabled devices present in the network.

Manual activation can also be completed at any time in the Teufel Raumfeld App’s menu under “Music services”.
How must I set the impedance selector switch of my receiver for Teufel speakers?
Here is more detailed information from the AUDIOVISION trade magazine (Issue 4/03) on the subject of impedance settings of the AV Receiver:

Actually, it should be quite simple: Connect the speaker cable to the amplifier and speakers with the correct polarity and you're done. Unfortunately, many manufacturers of home cinema receivers put stumbling blocks out for the users in the form of specifications on the rear of the device and/or in the operating instructions. These usually look like the following (translations): Minimum connection impedance six ohm! Or, speaker impedance six to eight ohm. And what is the problem? There are hardly any six ohm and only a few eight ohm speakers available in Germany. Most of the speakers sold in Germany have a nominal impedance of four ohm. So theoretically, you shouldn't connect them to most of the receivers and amplifiers.

To explain why it is possible after all, we would like to briefly explain the electrical engineering principles: The impedance of a speaker is nothing other than its electrical resistance which it puts up against the flow of current.

• Low resistance = high current
• High resistance = low current

Important to know for operation with an amplifier is that the impedance is not the same for all frequencies but can, for example, change between 50 and 200 hertz by 50 percent. So it isn't entirely correct to speak of impedance for a speaker per se, rather one must always consider the behaviour across the entire range between 20 and 20,000 hertz. To still achieve a reasonable connection value for amplifiers (which, by the way, says nothing about the output impedance of the amplifier itself but rather only which impedances may be connected to it), the creators of the DIN Standard have applied the following stratagem: Only the minimum value of the impedance in the audible range is decisive for the nominal impedance value. This is where the most current flows and the amplifier is subjected to the highest load. Speakers with eight ohm nominal impedance may only exhibit a minimum of 6.4 ohm, and those with four ohm nominal impedance 3.2 ohm. Six ohm are not defined in the DIN (which is applied internationally), but one could use the above values to interpolate that they may exhibit a minimum of 4.8 ohm.

From the definition it is apparent that the nominal impedance is only a rough benchmark, because it says nothing about how the entire course of the impedance looks. No matter whether it only reaches less than 6.4 ohm at one point and is otherwise beyond that, or if the impedance moves close to 3.2 ohm across the entire range, but does not drop below that. The last speaker is surely much more stressful for the amplifier, but has just a nominal impedance of four ohm as the other higher ohm one.

Conventional speakers usually exhibit one to two minima in the bass range, and there is one frequently in the treble range. These minimum values are usually not especially broadband. Aside from the minima, the impedance is usually far higher than the nominal impedance. The amplifiers are really stressed in the bass range because firstly, this is where the most energy is for music and especially the home cinema sound, and secondly, they have to let the most current flow through the impedance minima here.

And lastly, the main reason why many manufacturers don't want four ohm speakers to be connected: In extreme cases - for deep frequencies of consistently 3.2 ohm - the amplifiers in multichannel operation become very hot. A lot of current also means a lot of power loss and thus at lot of waste heat. However, much has to come together before that happens - namely high performance for a longer period of time and setting up the device without sufficient ventilation.

But this extreme case is seldom met in practice. As mentioned above, most of the speakers are not as critical by far, and it is extremely rare to listen to an exorbitant volume for a longer period of time. That is why it is not a problem from a technical point of view to connect speakers with four ohm nominal impedance to all modern home cinema amplifiers and receivers.

However, there is one small catch: The question of warranty. Should a defect occur to the device - which doesn't even have to do anything with the speakers - and the manufacturer notices that four ohm speakers were connected despite the specifications to the contrary, he could refuse repairs due to improper use. As discussions with manufacturers and distributors have shown, this is highly unlikely because they are also aware of the problems.

And for purely legal reasons, Lautsprecher Teufel may not give you a warranty either that your amplifier or receiver will tolerate four ohm speakers. We can only pass along one experience: For several years, the listening tests of the trade magazines are done exclusively with four ohm speakers, and not a single defect has occurred as yet even though the devices are driven to their limits. Also, the performance of each device is usually measured at four and eight ohm irrespective of the specifications of the manufacturers, and the load here is also considerable. It has been a long time since measurement laboratories have seen failures due to to low load impedance.

There are still some special cases, which should be briefly mentioned: Amplifiers/receivers with impedance switches give cautious natures the possibility to stay on the safe side under all possible conditions, even with the warranty. The four ohm setting of the corresponding switch reduces the supply voltage of the power amplifiers so much that excessive heat cannot occur even under unfavourable circumstances. However, the maximum power is then reduced somewhat.

During the listening tests of the trade magazine, these devices are always switched to the "eight ohm" setting to tease out the maximum performance reserves. A defect here has yet to occur. When choosing devices, take a close look because there are devices that only permit speakers with a minimum of six ohm despite the impedance selector switch, like the Pioneer VSX-D2011, for example. This is remarkable in another respect: It possesses a THXSelect license. This license is only issued if certain measured values are complied with that are determined at four ohm for at least the front and centre speakers.

If the THX laboratory had proceeded according to manufacturer's specifications, the VSX-D2011 would never have received a licence, as it would not have been permitted to perform the necessary measurements. By the way: this is also the case for other THX Select devices. But you needn't worry here: The THX logo not only offers additional security, but also a good lever should a manufacturer once refuse a warranty.

The AUDIOVISION TIP

Overheating is the main problem that can occur through the combination of four ohm speakers with power amplifiers that are not released for this.
Therefore, in case of doubt:

• Always set up the AV Receiver or amplifier in well ventilated places and never in a closed housing or close to the heater.

• Occasionally check the temperature of the device.

• Reroute the bass elements via set-up at the subwoofer, if possible.
Can I operate Teufel speakers with an amplifier with 6 ohm outputs?
Without problem!

The fact that some amplifier manufacturers give corresponding information is founded in the VDE standard. To comply with this standard, the devices may not become hotter than 40°C above room temperature so that no one is injured when touching the amplifier.

These 40°C are only reached in the threshold range, meaning for very great volumes for a longer period of time. There is no danger of overloading the amplifier during normal operation. The higher temperature that occurs when connecting 4 ohm speakers will not damage the device in any way. Therefore you can connect 4 ohm speakers without reservations.
What's behind THX Optimode?
THX Optimode is the latest development of the THX Digital Mastering Program consisting of a series of tests that enable every home cinema user to adjust his system exactly in picture and sound to the Optimode DVD currently in the DVD player.

The first DVD that supported the new feature was "Fight Club" in the Special Edition by 20th Century Fox (NTSC version). The offer has been continually expanded in the meantime.

The tests, which can be played on NTSC as well as PAL DVDs, consist of video tests that are helpful in optimally setting and configuring the TV or video projector, as well as audio tests that guarantee that the sound system is configured perfectly.

The special thing about these tests is the fact that the measuring signals are identical to the reference signals that were used during the final mixing of the relevant DVD. The home cinema system can therefore be co-ordinated accurately and individually to every single DVD with THX Optimode.

The goal of the entire procedure is that the sound and particularly the picture should appear in the home cinema exactly as the producer imagined. Let's assume the film producer wanted to create a certain mood in the film using specific colouring; this only works in the home cinema if the screen at home is just as co-ordinated as in the studio. Thanks to THX Optimode, that is guaranteed as far as possible.

Operating THX Optimode is just as easy: The software on the DVD includes all of the tests. Individually, these are video tests to set the contrast, brightness, colour, colouring, control of the correct ratio of picture length to picture width and the possibility to test the general qualities of the monitor.

In addition, there are audio tests for the phases of the speakers, connection of the speakers and the cut-off frequency of the LFE (subwoofer channel). Some tests will clearly show when it is necessary to consult a specialist for the settings.
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.
I would like to connect the appliance to a record player, is that possible?
In principle, yes.

However, for a record player an additional phono preamplifier is required - these are available from specialist retailers for around €50.
What are the technical requirements for an AV receiver to function with RearStation 4?
The AV receiver must be able to send signals to the rear channels via a pair of cinch terminals. Generally these terminals will be identified as Side, Rear, or Left/Right. It is often also possible to "activate" channels on specific terminals by means of the AV receiver menu.
Can I also connect a 6.1 speaker system to a 7.1 AV Receiver?
No problem.

A 7.1 AV Receiver merely provides the possibility of utilising a 7.1 speaker system; it is not, however, a mandatory necessity.

That is why you can only use a 6.1 speaker system with the 7.1 AV Receiver. In the "Speaker Set-up" menu of the receiver, you frequently only need to specify which of the two channels will be addressed as rear centre.
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