
amra
Well-known member
I am wondering if you can sum the output of a combo amp, in sort of an external "bridged" mode with some kind of external device to run a single cab?
Can it be done?
Can it be done?
amra said:I am wondering if you can sum the output of a combo amp, in sort of an external "bridged" mode with some kind of external device to run a single cab?
Can it be done?
Zaphod B said:Not unless it has a bridging function, or a channel blend.
Your combo amp has two discrete 35W power sections?
You go first and let us know how it goes.timthetortoise said:Not too odd. If it has modelling capabilities or an effects loop it's probably stereo.
Also, I'm not saying this would work, but why wouldn't it? I mean, as long as polarities are matched and impedances are paralleled, the output transformer really wouldn't know the difference, would it?
Zaphod B said:You go first and let us know how it goes.![]()
The main reason I can think of is that the output of the amp is looking for an impedance of 4, 8, or 16 ohms. I would imagine that the impedance of the output section itself, viewed as a load of another output section, would not be anywhere in that range, and so you would be paralleling the impedance of two output stages with a speaker. What's the resulting impedance as seen by either output section? Whatever it is, it isn't going to look anything like a speaker to the output section and if it's really low it's going to fry them.timthetortoise said:If I had a combo try it with, I probably would. But the question remains, why wouldn't this work?
amra said:Ok, so you can't just hook them up together. I pretty much figured that would be a bad idea.
I am wondering though, if you could replicate how a mono bridge switch works, but with external components. I mean, it seems to me based on what Zaphod says, that the bridge switch must somehow handle the low impedances somehow when combining two seperate channels. Does anyone know how that works? If you could build an external box that did the same thing, it would be pretty sweet.....