On Thu, 29 Jun 2006 16:12:26 +0100, "Keith G"
wrote:



I am using a rather smart little Denon SS amp 'pre only' to drive various
valve power amps - giving instant confirmation/reaffirmation of my
preference for valves every time I do it!

This entails using the amp's 'Pre Outs' and switching Speakers A and B
*both* off.

Could someone confirm that this, at least, *unlikely* to harm the amp when
used thus for long periods (all day long, when it's not as hot as today) -
I'm *certain* it doesn't harm the amp, but there's always that little tiny
doubt nagging away!

(I don't want to burst the casework open with a build-up of sound pressure!!
:-)

When you say you switch both speakers off, do you mean you are leaving
the amps with open circuit outputs? As long as you aren't feeding any
sizeable signals through them, it won't do any harm.

You could always add a standby switch to the valve amps. This is a
switch to disconnect the HT line from the amp circuitry, leaving it
otherwise fully powered, with heaters on. It is a standard feature on
guitar amps.

d

--
Pearce Consulting
http://www.pearce.uk.com