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From: Richard Keller on 15 Nov 2009 02:15 If I want to use a consumer stereo amplifier to drive a purely resistive load, rather than a speaker, what factors should be considered avoid damage to the output stage? How can I maximize power output without choosing a too small value resistor? Richard Keller
From: christofire on 15 Nov 2009 07:31 "Richard Keller" <richardkeller(a)sinetek.com> wrote in message news:4affa98f.883296(a)news.tpg.com.au... > If I want to use a consumer stereo amplifier to drive a purely > resistive load, rather than a speaker, what factors should be > considered avoid damage to the output stage? > The rated minimum load resistance - assuming it's a solid-state power amplifier. > How can I maximize power output without choosing a too small value > resistor? > By using the rated minimum load resistance, of course! Chris
From: Jamie on 15 Nov 2009 10:30 Richard Keller wrote: > If I want to use a consumer stereo amplifier to drive a purely > resistive load, rather than a speaker, what factors should be > considered avoid damage to the output stage? > > How can I maximize power output without choosing a too small value > resistor? > > Richard Keller Just select R load that is equal to what the amp is rated for. 4 or 2 ohms for example. And make sure the load can handle the power and also, many consumer amps will not operate at max level for long periods. You may want to check that in the spec's of the amp.
From: Vladimir Vassilevsky on 15 Nov 2009 10:40 Richard Keller wrote: > If I want to use a consumer stereo amplifier to drive a purely > resistive load, Other then a dummy load, what could be a purely resistive load? > rather than a speaker, what factors should be > considered avoid damage to the output stage? > How can I maximize power output without choosing a too small value > resistor? Keep in mind that the "rated audio power at rated resistance" of the amplifier could mean absolutely nothing. You can probably count on sustaining of no more then 1/10 of so-called rated power. Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com
From: John Fields on 15 Nov 2009 12:34
On Sun, 15 Nov 2009 09:40:26 -0600, Vladimir Vassilevsky <nospam(a)nowhere.com> wrote: > > >Richard Keller wrote: > >> If I want to use a consumer stereo amplifier to drive a purely >> resistive load, > >Other then a dummy load, what could be a purely resistive load? --- An incandescent lamp? news:aje0g5pg8caolcojp3f8hgg2ajmlslq3s0(a)4ax.com JF |