How to use TDAI-1120 as a RoomPerfect processor

[@Permidal]

How high quality will it be? How good is the volume control?

[@SteinLyng]

The TDAI-1120 is fully digital with no analog conversion inside, so it retains the digital audio quality coming in. The RoomPerfect processing is done in high-resolution using a 32 bit processor, retaining high-resolution audio - for example 24 bit and 96 kHz. The volume control is also done without the usual analog resistors or analog attenuators, using digital attenuation known from - for example - high-resolution mobile players, streaming players, audio soundcards.

[@jonnehman835]

Can you connect a power amp and a powered subwoofer?

[@SteinLyng]

The TDAI-1120 can be set as a pre-amp / RoomPerfect processor, using the analog stereo pre-out for an external power amp. Or using the pre-out for a subwoofer. Since the small TDAI-1120 only has one set of pre-out, it is not possible for both at the same time - either for a power amplifier or a subwoofer. The larger TDAI-3400 or former TDAI-2170 offer an additional digital output to connect an SDA-2400 power amp additionally.

[@simonekvall361]

Could the 1120s RoomPerfect handle a setup with a power amp and sub, if the sub is connected to speaker terminals with speakon cable (like the ones REL use) ?

[@SteinLyng]

@@simonekvall361 It is a somehow reversed setup, but technically the analog pre-out could be configured with a high pass filter (for mid and high), and the main speaker output with a low pass filter driving a passive subwoofer (for the bass). However, an active subwoofer would have its own amplifier. The speaker output of an amplifier (the one from the TDAI) should not be connected to another amplifier input (the one from the active subwoofer). In a TDAI amplifier, similar to conventional Class D amplifiers, both speaker outputs (usually named plus and minus) carry voltage. For some active subwoofers with high level inputs that is not recommended, and may damage the one or the other amplifier. In short, the best is to use the TDAI-1120 either with passive speakers + active subwoofers, or external power amp for the speakers + passive subwoofers, or upgrading to the larger TDAI-3400 with more power and more connection options.

[@simonekvall361]

@@SteinLyng Thanks for the detailed reply! Best regards

[@olasumbo2663]

I have the TDA 1120 and SDA 2400. Since the analog out will be used for input into SDA2400. Can I use the existing output as input for a subwoofer?

[@SteinLyng]

The main output is made for passive speakers, and that can also be a passive subwoofer. A low pass filter can be set in the menu with a suitable crossover frequency, with our without a high pass filter for the analog output (to your SDA-2400 and the main speakers). RoomPerfect will then align both in the best way. The main speakers outputs from the TDAI amplifier should not be connected to another amplifier, for example to an active, amplified subwoofer. Both TDAI speaker outputs, plus and minus, carry voltage, which in general should not be connected to an active subwoofer. However, it depends on the subwoofer type, so you may ask the subwoofer manufacturer. By the way, if you don’t use the main outputs at all but only the analog outputs for the SDA-2400, disable the main outputs (set to None) so the TDAI-1120 doesn’t constantly power an unused output.

[@olasumbo2663]

Awesome response as always. Thank you. Can you make another video on the setup as described above?