preamplifier after preamplifier?

on my SVS sub you can run speaker wire from the power amp speaker output to the sub and volume will be controlled by the preamp volume.  thety call it high level input on the sub.  

Not possible because the first preamp output will be too high like firca power amp and not for a preamp.    The second preamp will need a low output like from a source example Phonostage ,CD PLAYER or DAC . unless the first preamp has a source direct out.  

Correction to above entry.   Firca should read for a   Power amp

Do you have a tape out on preamp 1? If so use that to drive preamp 2. Then use preamp 2 for volume control for subs. There are a few postings about this type of hookup.

This is the hookup I use for controlling my passive suds. Tape out to preamp 2, then to my external crossover, then to DSP for subs only. then to dedicate power amp for subs.

Hi Guys,

Signal purity to be highest goal here.

any preamp externally on top of another or dsp will work against it.

Solution for it in case of using digital front end with both volume control and a DAC, such as a CD player, connect player’s RCA outputs to subs directly and player’s XLR to your preamp. Or use Y splitter at player’s RCA Outputs.

so any kind of combination with volumes of your speakers and your subs is possible.

I do this for years now with my Nagra system. Very exiting every session…

Enjoy the music.