[bmg1]

Hi All.
I've a stereo tube preamp and HT preamp (NuForce AVP16). My tube preamp does not have a HT bypass. How do I hook it up to switch between these two preamps?
Two options I'm considering are:
1) Use a switcher (Zektor MAS 7.1). However, this does not seem to be available new/used!
2) Connect the tube preamp to the TAPE or AUX input of HT preamp. Use the HT preamp as the master volume control. Is this safe?
Any other better options?
Thanks!

[srb]

Those are pretty much your options.  Since you are using a tube preamp in addition to an HT preamp, you are obviously doing so for the purity of sound and/or for the tube sound for 2 channel listening.  I wouldn't feed the tube preamp into the HT preamp circuitry and additional volume control if I had the option of using a switcher.
 
A reasonably priced switcher is the Inday AV4X-R for $129.  It uses a 12VDC external power supply, but that is only for the remote control and display, the switching circuitry is passive.
 
Steve
 

[Mr Peabody]

If the NuForce has a "tape monitor" you can run the tube pre into that and bypass the Nuforce volume control.  The tape in would basically operate like a bypass.  You could actually do the same if the Nuforce offers multichannel analog inputs just use the two main inputs.