Passive & Tubed pre-amps to power amp at same time?


Would any harm be done by using a Y-splitter to simultaneously connect a passive pre-amp and tubed pre-amp to the same power amp? The idea would be to use the passive for volume control and run signal from a CDP to the power amp. The tubed pre would be used for sending other inputs (e.g., phono) to the power amp. All devices would be "powered up" at the same time but only one input at a time would be used. Thanks in advance.
ghosthouse
If you use your CD player with your preamp, why not try lowering the volume on the CD payer. That should give you more range when using the preamps volume control.
Zd...no volume control on the CDP. It's 2.6 Vms out unbalanced and 4.6 Vms balanced. That's why I had been thinking to skip the tubed pre-amp and go passive with the Schiit SYS.

If I get this right with what you want to do.

What I would do is put all your sources into the inputs of the active preamp so you can switch between them, then come out of the tape output of the active preamp into input of the passive preamp and then out of the output of it to the poweramp/s input.

Basically this way your using the active preamp as a source selector.

Cheers George
Thanks for the idea George. What I am trying to do is introduce volume control
for the CDP without any addition boost in gain while leaving other sources
unaffected that run through the tubed pre-amp. Your idea does seems like
something to explore. No tape out...but sub out. However, I am going with Al's
suggestion of attenuators. Ordered a couple of Harrison Labs -12dB RCA plugs
from Parts Express. Much less expensive than those from Rothwell and Parts
Express allows returns if they don't work out. Others on A'gon do report
satisfactory results using these. Thanks again to all for the suggestions.