I have used successfully (thanks to this forum) the above amplifier for an 8 speaker installation I build. (powered from 24V dc PSU)
I would like to rebuild this project and I wonder if using a balanced to unbalnced board before that amplifier will improve the sound?
the input signal is from computer via an motu ultralight mk2 interface.
Is it acctuall need to make the signal unbalacned before feeding the amp?
another question is this amp board will be better quality for 8 small 8ohm speakers?
I would like to rebuild this project and I wonder if using a balanced to unbalnced board before that amplifier will improve the sound?
the input signal is from computer via an motu ultralight mk2 interface.
Is it acctuall need to make the signal unbalacned before feeding the amp?
another question is this amp board will be better quality for 8 small 8ohm speakers?
The TPA3116 block schematic looks quite balanced
https://www.ti.com/product/TPA3116D2
so why would you need a conversion to unbalanced?
https://www.ti.com/product/TPA3116D2
so why would you need a conversion to unbalanced?
Using a 3116 in stereo BTL configuration can be driven by an unbalanced source. ( for each channel )
The negative i/p should be coupled to GND with a cap the same value as the isolating cap in the drive side.
the 3116 is a differential input.
My early builds did this driven direct from an ipod.
(The same cannot be done with the 325x group...they are 4 independent amplifiers.)
The negative i/p should be coupled to GND with a cap the same value as the isolating cap in the drive side.
the 3116 is a differential input.
My early builds did this driven direct from an ipod.
(The same cannot be done with the 325x group...they are 4 independent amplifiers.)
TPA3116 is with fully balanced inputs in stereo and PBTL modes!
Figure 37. Schematic, page 20 from the datasheet.
You don't need any converters!
But I think on the cheap chinese boards, the negative inputs for each channel are connected to ground...
So you have to cut the traces before the input capacitors and solder negative input wires directly to the capacitors.
Figure 37. Schematic, page 20 from the datasheet.
You don't need any converters!
But I think on the cheap chinese boards, the negative inputs for each channel are connected to ground...
So you have to cut the traces before the input capacitors and solder negative input wires directly to the capacitors.