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Old 06-23-2009, 03:03 PM
Big.Al Big.Al is offline
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I don't know about the Loudbox, but most XLR inputs have a gain control that can be adjusted to compensate for a variety of input signals, and of course the guitar output level can usually be controlled by its own volume contol. Impedance matching is the imore difficult thing, and most guitar preamps have a pretty low output impedance. As long as the impedance of the input is at least ten times that of the source, it usually works OK. I have a compact passive DI with an impedance matching transformer that I usually use anyway, because it also acts as a jack adapter, but sometimes there are more guitars than DI's. Active DI boxes, those meant for plugging into an XLR input, have a signal that's at least as hot as any of my built in guitar preamps . . . at least the ones I've used.

Impedance:
High into low, it won't go.
Low into high, it will fly.

Last edited by Big.Al; 06-23-2009 at 03:29 PM. Reason: clarity
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