#1
i have a mesa boogie stereo simul 295 power amp and it has 2 channels an A and a B. both channels have two 4ohm outputs and two 8ohm outputs. im only using channel B. now i have one cab with four 8ohm speakers and im not sure which of the outputs on channel B i have to plug my speaker cable into because im afraid of overloading the amp and blowing the tubes. any help is greatly apperciated.
#2
It depends on the total actual impedance of your speaker cab. 4 8-ohm speakers can be wired any number of ways w/ varying impedances. If your speaker load is more than what the amp sees (for example, amp set to 4 ohms while using an 8 ohm cab),
in most cases this won't hurt the amp, but will simply make it less efficient. If you run a 4 ohm cab while the amp is set to 8 ohms, yes, you will eventually fry your amp head. Chances are, the cab is wired for 4 ohms or more, so using a 4 ohm output on the amp should be fine, but ideally, you need to find the exact impedance of your cab.

Edit: btw, if you mismatch impedances the wrong way, you won't hurt the tubes. You'll blow the output transformer, which is a much bigger deal.
Quote by 311ZOSOVHJH
Riffhog for President


Quote by Cathbard
There's no point apologising for your feet smelling when there's a 300lb gorilla in the room taking a crap on the couch.


Recognised by the Official EG/GG&A Who To Listen To List 2011
Last edited by riffhog at Sep 2, 2009,