anonymous
24 January 2006
Hi all,
I've got a stereo power amp which is 250w per channel RMS at 4ohm;planning on using it after a guitar preamp in the signal chain
I've also got a 4 x 12 400w guitar cab; it's wired so there's two inputs, one 8 ohm input for the left two speakers (200w), and one 8 ohm input for the right input, of the same power.
Just wondering the best way to hook it up for maximum power output- is it possible to sort of bridge the two outputs of the power amp (it doesn't say anything about bridging in the manual), then run it into the guitar cab which i would have wired the two sides L + R in parallel?
hope i'mb being clear enough
Thanks!
Comments
Recordometer: You can simply run each of the (2) channels of the
Recordometer:
You can simply run each of the (2) channels of the power amp to each "side" of the cab. This will provide an 8-ohm load to each side of the amp.No problem, this will simply not deliver the maximum available power from the amp...probably 150-175 watts instead of the 250/side.
Leave it there. If you parallel ("daisey-chain") the 2 halves of the speaker cab together, you will end up with a 4-ohm mono load, and that is too low for a typical mono-bridged stereo power amp to "see". This represents a 2-ohm/channel load on the amp, and that can very easily cause a thermal condition on the amp, making it unstable and shut down.
If you want to get the max from the amp, you should get another cab like the 1 you have now and use the 2 cabs on the 2 channels of the stereo amp.