Re: More power

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Posted by Bob 'Skippy' Blechinger on January 15, 2002 at 05:41:50:

In Reply to: More power posted by Bloorp on January 14, 2002 at 18:05:04:

: I have recently acquired a strange little 410 cabinet that requires gobs of power to drive. I currently have a Crate 250W and a Randall 300 W head. Can these two be combined for more hi-watt punch?

First, how do you define "gobs of power"?

Are you running the amp with correctly matched impedence? The reason I'm asking is that if you run an amp into a cabinet with a higher impedence, you can lose efficiency, and it'll take more power to get the volume levels that you *should* be getting. If your speaker cabinet is 8 ohms, it should be hooked into an 8 ohm output on your amp.

If your cabinet isn't marked for impedence, you might have to do a little looking inside. The possible wiring combinations are kind of complicated, but I can give you a few basic details here. There are 2 basic ways to wire a cabinet:

Series - everything is all along one circuit path

Parallel - 2 wires, one runs to each side of the speaker

There's also Series-Parallel, which *combines* the two, and makes everything *much* more confusing.

As to whether the 2 amps can be combined, I'd have to say that it depends on the cabinet. What you're asking about is referred to as "bi-amping", and you can do it with one cabinet that's *specifically* made for use as a biamp rig. For example, it's possible to have one input on the cabinet hooked to 2 of the speakers, and the second input hooked to the other 2 speakers *if* the cabinet is wired for it (it's more common to have each amp driving a separate cabinet, though).

Hope that helps! Let me know how it works out, ok?


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