Competition Power Rating

[Sam Carleton]

I just saw this stats for an amp:

source: http://tinyurl.com/je5r
--------------- snip ---------------

Model: SH-1
Channels: 1 CH
Frequency Response: 10Hz ~ 300Hz ±1dB
Rated Power: 14.4 Volts DC
T.H.D.: < 0.1%
4 Ohm RMS: 2000W x 1*
2 Ohm RMS: 3000W x 1
1 Ohm RMS: 4000W x 1**
S/N Ratio: > 100dB
Input Sensitivity: 0.16 ~ 4 Volts
Damping Factor: > 700
Efficiency: 69.10%
Fuse Requirement: 120 x2 Amp
Power Supply: 11 ~ 16 Volts DC
Low Pass @ 18dB / oct: 40Hz ~ 300Hz
Sub-Sonic: 10Hz ~ 100Hz @ 24dB
Remote Bass Knob: Yes
Bass Boost: No
Dimensions (L x W x H): 15" x 8 13/16" x 6 3/4"
Weight: 23.5 lbs.

* H-1: 300W x 1, SH-1: 600W x 1
(Competition Power Rating)
** For Competition Use Only

--------------- snip ---------------

They are claming an amp at 4-ohms is considered a 600 watt amp in
competition? How can this be? How are amps rated in competition?

Sam

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[n8 skow]

Man, those look like repackaged Harrison Labs amps (and if they are, I'd be
EXTREMELY wary of the output ratings...)

In answer to your question though, some competition sanctions, like USACi
for example, are broken into power classes. Amps are valued at their 4-ohm
bridged rating. The amp in question would put you in the 301-600watt power
class (unlimited number of woofers) - though in actuallity - you'd have
1500watts at your disposable... Up until a big rule changed this season, a
person could compete in the same class with say 6 Kicker XS100's and have in
excess of 6000watts against your 1500. They now have a limitation on the
number of amps you can have in a given class - but manufacturers will just
find a way around it as they have in the past, which is generally why theres
so much frustration directed toward such sanctions...

dbDrag on the other hand is based on the number of woofers and is a much
more honest 'sport' in my opinion...

n8



> I just saw this stats for an amp:
>
> source: http://tinyurl.com/je5r
> --------------- snip ---------------
>
> Model: SH-1
> Channels: 1 CH
> Frequency Response: 10Hz ~ 300Hz ±1dB
> Rated Power: 14.4 Volts DC
> T.H.D.: < 0.1%
> 4 Ohm RMS: 2000W x 1*
> 2 Ohm RMS: 3000W x 1
> 1 Ohm RMS: 4000W x 1**
> S/N Ratio: > 100dB
> Input Sensitivity: 0.16 ~ 4 Volts
> Damping Factor: > 700
> Efficiency: 69.10%
> Fuse Requirement: 120 x2 Amp
> Power Supply: 11 ~ 16 Volts DC
> Low Pass @ 18dB / oct: 40Hz ~ 300Hz
> Sub-Sonic: 10Hz ~ 100Hz @ 24dB
> Remote Bass Knob: Yes
> Bass Boost: No
> Dimensions (L x W x H): 15" x 8 13/16" x 6 3/4"
> Weight: 23.5 lbs.
>
> * H-1: 300W x 1, SH-1: 600W x 1
> (Competition Power Rating)
> ** For Competition Use Only
>
> --------------- snip ---------------
>
> They are claming an amp at 4-ohms is considered a 600 watt amp in
> competition? How can this be? How are amps rated in competition?
>
> Sam
>
> --
> See my links engine for a collection of sites that
> might be of interest to you. Your additions will
> make this engine more powerful global resource.
> http://www.miltonstreet.com/scarleton/links/