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From: lewdslewrate on 23 Mar 2010 08:59
Hi. I inherited an old Camco DL1500c-p power amp. I want to use it
to drive an l-acoustics SB115 (650w) sub as part of a drum monitor set
up. info given with amp is: For 8 ohm: 1) 1khz sine wave = 500w,
2) crest factor 1:10 = 640w 3) peak = 730w. which is the most
appropriate figure for matching amp to speaker please?

cheers
steve
From: liquidator on 23 Mar 2010 14:56

"lewdslewrate" <stevewells(a)waitrose.com> wrote in message
news:49613372-7d7a-49e1-b071-1e5cb2e3cf09(a)y17g2000yqd.googlegroups.com...
> Hi. I inherited an old Camco DL1500c-p power amp. I want to use it
> to drive an l-acoustics SB115 (650w) sub as part of a drum monitor set
> up. info given with amp is: For 8 ohm: 1) 1khz sine wave = 500w,
> 2) crest factor 1:10 = 640w 3) peak = 730w. which is the most
> appropriate figure for matching amp to speaker please?
>
> cheers
> steve

I can't imagine how any of them would make a difference?


From: Rupert on 23 Mar 2010 16:12
On Mar 23, 5:59 am, lewdslewrate <stevewe...(a)waitrose.com> wrote:
> Hi.  I inherited an old Camco DL1500c-p power amp.  I want to use it
> to drive an l-acoustics SB115 (650w) sub as part of a drum monitor set
> up.  info given with amp is:  For 8 ohm:  1) 1khz sine wave = 500w,
> 2)  crest factor 1:10 = 640w    3)  peak = 730w.  which is the most
> appropriate figure for matching amp to speaker please?
>
> cheers
> steve

The 640 watt figure would be for dynamic signal content vs the tiny
crest factor of a sine wave. The actual power for heavily compressed
music would fall somewhere in between. In any case, the difference in
output is so small that it's irrelevant in the real world. L'Acoustics
rates the SB115 at 500 watts program power, so that amp should be a
good match.

Rupert

http://www.shure.it/arcfile/AcoustSB115_s.pdf
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