||I bought DAC-AH Completed and made some changes.
Original Product plays clear and light sound.
1) Add condencers (1000 micro-F x 4, 0.1 micro-F x 8) to TDA1543 power-line.
2) Remove TDA1543 x 3. As the result, 5 DAC is now working.
3) Change OP-Amp from OPA602AP to OPA627BP.
4) Adjust TDA1543 offset voltage to 4.6V.
Modified version of DAC-AH plays more precise and wide-scale sound.
Original product has a great potential ability.
I recommend to buy DAC-H and enjoy modification.
Rating: [5 of 5 Stars!]