RA-1070 is very similar to RA-985BX, but with extra user options (display, input settings, ...) . Preamp and power amp sections are probably 90% the same.
You can download SM here:
http://www.bwgroup-support.com/downloads/techmanuals/rotel/RA-985BX-TM.pdf
1070 and 985 are fantastic integrated amps to begin with, but you can upgrade them to be much better.
Stuff to do:
reduce global FB and increase local FB (input diff. degeneration, VAS degeneration)
remove unnecessary coupling caps (2 in series), leave only one cap at power amp input
upgrade all caps in power supply and local decoupling
......
You can download SM here:
http://www.bwgroup-support.com/downloads/techmanuals/rotel/RA-985BX-TM.pdf
1070 and 985 are fantastic integrated amps to begin with, but you can upgrade them to be much better.
Stuff to do:
reduce global FB and increase local FB (input diff. degeneration, VAS degeneration)
remove unnecessary coupling caps (2 in series), leave only one cap at power amp input
upgrade all caps in power supply and local decoupling
......
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