"Rob" wrote in message
...
I'm fiddling about[1] trying to use 1 pair of speakers, with the option to
switch between power amps - one SS, one valve. This:

http://www.maplin.co.uk/Module.aspx?...299&doy=search

would seem to do the job, but I'm unclear on a couple of things:

1. What would be the consequence of operating the valve amp when the
switch (is there a switch?!) is connected to the SS amp? I'm going to
guess 'disaster' - if that's the case is there an elegant way around this
possible mishap?

(I assume SS amps don't mind being left on without speakers btw)

2. Does anyone know what the proection circuit referred to might be, and
if it would 'pollute' the sound?

TIA

Rob

[1] tentative foray into the wire maze that is home cinema - just got a
couple of cheap AV amps, and currently trying the pick (a Yamaha DSP 595A)
of the bunch. Actually sounds very good in normal stereo until it's
switched up - hence this post. I'd use the Yamaha amp for 'casual'
listening.



The danger with two amps and one pair of speakers is if ever the amps 'see'
each other, one (or both) will die of shock!

Any switch used in this situation must be of the 'break before make' variety
and the disconnected amp should default PDQ to a dummy load. To discourage
quick and clumsy switching, I've always thought a system of wired sockets
and a couple of pairs of banana plug L & R 'patch leads' would make a an
easy and interesting DIY project. Otherwise relays should be used instead of
switches I gather?? (I know SFA about it) Also I understand the dummy loads
can exist permanently on both sets of the wires to the amps and connecting
the speakers 'over them' renders them 'invisible'?? (Or am I typing out of
my arse...?? :-)

While I'm on, have you seen these?

http://www.reel-multimedia.co.uk/

Looks mighty interesting and very versatile, but I suspect they aren't much
different to a suitably configured PC....???