From: Paul Evans
Subject: Re: 40W bridge audio amp + signal-level crossover
Date: Tue, 10 Sep 2002 00:17:32 +0100
Organization: University of Cambridge, England
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On Mon, 09 Sep 2002 06:15:44 -0000
firstname.lastname@example.org (Bob Wilson) wrote:
> Mosfet or bipolar, it is irrelivant. The voltage needed are essentially
> related to your load impedance and your desired power level only. Your
> rail voltage needs to be theoretically 50 Volts (plus a little headroom
> for the transistors to work) for a non-bridged topology. So, say 60
> Volts, or +/- 30V for a split rail.
I do believe I said bridge mode :) Can I safely say halve this? 0 to 60
non-bridged is the same as -30 to 30 bridged, no?
> Sure it is workable. This is what bi-amping is all about. Even 25 W to a
> tweeter is a hell of a lot of power. Probably far too high.
Really? I only say that because the driver is rated at that. Do you think
I should run it below that; say 15W?
> A blocking cap is simply a poor man's high pass crossover for a tweeter.
> If you are bi-amping the tweeter, the crossover is already taken care
> of, and a blocking cap will be useless (there will be nothing to
Not even a small DC offset due to bad amp design? Or to guard against a
(2nd Year CompSci at Pembroke College, Cambridge, England)
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