LFD amp, DAC?

If the dac has a volume control, in theory yes, but you would be using 2 pre-amps - the one in the dac plus the one in the LFD. You would have to preset the LFD volume, say at 50% and then play with the volume on the dac.

Not a very good idea sound wise, but it should work. Typically, you would set the volume on the dac to 100% or bypass it altogether.

The LFD from what I saw on the web is only a passive volume control in front of a power amp with input switching.

So just turn it up full or get a tech to take it out of circuit even better. Then just use the volume on the dac/cdp if it has one.

Cheers George

Okay, but is a downside soundwise to do that you mean?

My take on downside.
If the passive VC on the amp is up full and you use the DAC's volume control, theoretically there is no down side, just another pot wiper light contact in the signal path, that the signal has to pass through, even though it's up full.
But to me, better not to have that extra light contact in the signal path. If your anal like me take the amps passive VC out of the equation altogether.

Cheers George