[Sander deWaal]

"west" said:

Can we take an off the shelf CD Player and install , let's say a 10K stepped
attenuator or Alps type pot inside the CD player on the output line? Would
this make a cleaner audio input to the tube amp? The 2 alternatives are an
outboard passive "preamp" with let's say 100k attenuator or installing it
inside the amp. I tried the passive preamp route with mixed results but got
straightened out from info in a previous thread by using a much shorter
interlink cable.


Yes, it is possible to put a potentiometer *before* the last opamp
stage, so that opamp acts as a buffer.
Be sure to remove the muting transistors at the output, they can be
replaced with a small signal relay with its NC contacts to gnd.
The drive signal for the relay can be obtained from the bases of said
mmuting transistors, with a NPN driver inbetween.


But I prefer my volume pot in the (pre) amp, simply because there are
other sources such as my turntables and Roku soundbridge..

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