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Switching a single set of speakers between two amps

I search all of the posts first, and found one discussion about this topic, 4 years ago, but it wasn't exactly the same as my situation, so I am going to bring it up to see if anyone has experience with this.

Right now, I am using my AV system in conjunction with my analog system - I have a Garrard 301/Jelco 750L/Zu Audio 103, feeding a Tavish Adagio, which then rolls into an NAD T187/Classe CA5300, connected to KEF speakers (stereo pair are the LS50s, which might be the biggest bargain in audio -I used to run Maggies - the 3.7i's, which are great speakers but turn out to be wrong for my room - contact me if you want to buy them! - I initially purchased them for a different environment, where they worked great, but they are too large for the room I am in now).

What I want to do - continue to use the NAD/Classe system for A/V and also for surround SACD, but install an integrated tube amp - maybe the Line Magnetics 518- for use with vinyl and tape.  I located one well-reviewed switch - the Beresford TC-7220 - and I wanted to see if anyone has actual experience running two different amps with the same speakers, especially when one of them is a tubed amp.
tgr

Showing 1 response by almarg

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almarg
9,670 posts
 
The thing to be careful about, as you may realize, is that most tube amps should not be operated unloaded, at least when they are processing a signal. So you would have to be sure that the tube amp is always turned off when the other amp is being used. Or, alternatively, have the switch constructed or modified such that it connects suitably chosen resistors to the outputs of the tube amp when (and only when) the other amp is selected.

Regards,
-- Al

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