2. amps-preamps
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Current vs. Watts??? Need clarification.

I've got a Rotel RB 1070 PA (about 125 watts) driving Spendor S8 speakers and I can't escape the feeling that this amp doesn't deliver enough power to drive these speakers. I'm getting clipping at pretty moderate volumes - say 1/3 on the volume knob. I've heard that this may have to do with the level of curreent actually being delivered to the speakers, as opposed to the amp's stated wattage output. I have read that the S8s like a lot of power but I would have thought 125 watts sufficient to drive a 2-way Is my amp just too small? Anyone have any thoughts on this?
grimace

Showing 1 response by jamnesta

jamnesta
155 posts
 
W = E X I X P.F.

P.F. (Power Factor in %) refers to the phase shift between current and voltage at various frequencies. Some speakers are more prone than others.

So, the more phase shift you have the more current required to achieve the rated watts.

A sufficient power supply will help sustain the voltage during larger phase shifts, and some amps are able to deliver more current.

I guess there are a lot of ways to skin a cat and some amps do it better than others. :-)....?

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