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Crown XLS 2000


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#1 quadro

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Posted 04 October 2011 - 09:47 AM

I have bought Crown XLS 2000 and too disappointed!
Because it's real power is around 300W per channel (with 4 Oms per ch.)
I've measured it with oscillograph and tester.
Why the info on the official site differs from real?

Minimum Guaranteed Power
XLS 2000
Stereo, 4 ohms (per ch.)
650W
http://www.crownaudio.com/amp_htm/xls_drivecore.

Please explain my amp is broken or the information on the site is absolutely incorrect?
Many thanks for help!

#2 Kevin Heber

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Posted 04 October 2011 - 11:10 AM

Are you using a sine wave input?  What voltage and frequency is the input signal, and what input jack are you using?  Are you using a power resistor?  How are you measuring power?

We get challenged on power specs every now and then, and every time I do a quick check in our lab here, our specs are validated.

#3 quadro

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Posted 05 October 2011 - 02:07 PM

Are you using a sine wave input?  
Yes, we are using a sine wave input

What voltage and frequency is the input signal, and what input jack are you using?  
U=0.7V   F=1Khz

Are you using a power resistor?  
Yes, we are using a power resistor

How are you measuring power?
P=(U*U)/R

sticker on back side of amp is 350W, what is it mean? http://xmages.net/i/3139369
Thx.


#4 Stephane

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Posted 05 October 2011 - 06:07 PM

QUOTE(quadro @ Oct 5 2011, 03:07 PM) View Post
Are you using a sine wave input?  
Yes, we are using a sine wave input

What voltage and frequency is the input signal, and what input jack are you using?  
U=0.7V   F=1Khz

Are you using a power resistor?  
Yes, we are using a power resistor

How are you measuring power?
P=(U*U)/R

sticker on back side of amp is 350W, what is it mean? http://xmages.net/i/3139369
Thx.



In order to get full output first you need to show 1.4 volts to the input not .7 volts and this is a minimum (gain knob at 0) cheer.


#5 Mctwins

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Posted 06 October 2011 - 06:49 AM

HaHaHa

One have to measure correctly before make any statements biggrin.gif

I believe that the sticker (350Watts) is how much it will consume from the AC outlet from the wall.

One question is how big is the power resistor?

Thanks