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#1 makis

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Posted 25 October 2012 - 05:56 AM

Hello. I am confused with MA-i specifications, and i want to ask which are correct: 6000 or 3750, 3500 or 2800...? Thanks.

#2 dakos

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Posted 25 October 2012 - 06:55 AM

I see what you mean, the correct specs are in the data sheet, someone must have mistakenly updated this spec.

#3 makis

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Posted 26 October 2012 - 07:59 AM

Can you explain me please why in some amps 2 ohm wattage is bigger than 4 ohm (like XTI), and MAi is the opposite? Thanks a lot.

#4 dakos

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Posted 26 October 2012 - 10:47 AM

Hello Makis,
Look here:
http://www.crownaudi...amps/138022.pdf
And here:
http://crownaudio.com/kb/entry/88/
Avi

#5 makis

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Posted 26 October 2012 - 05:12 PM

Ok. The question that rises then is: Can we run 4 x SRX728 (2ohms) on a 12000 and have 6db of headroom as if we run him at 4ohms?

#6 dakos

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Posted 27 October 2012 - 02:29 AM

The headroom is up to you to manage so I don't know exactly what you mean by saying if you can have 6dB of headroom. I'll explain... The amp has about 1dB of headroom built in, that can't be changed, the speakers have about 6dB of headroom, that can't be changed either. So, if you want 6dB of headroom you need to keep the continuous power 6dB below what the limiting factor (speakers or amps) is. I'll give you an example:
If your speakers can handle 2000W peak and your amp can give them 10000W at their rated impedance, then the speakers are the limiting factor and if you need 6dB of headroom you should keep the continuous power below 500W (2000W-6dB).
If your speakers can handle 25600W peak (4X SRX728s) and your amp can give them a peak or burst of "only" 12000W (2 ohm stereo MA12000i) at their rated impedance, now the amp is the limiting factor and if you need 6dB of headroom you should keep the continuous power below 3000W (12000W-6dB).

If you operate the system this way you will get 3dB less SPL then what you would have if you had an amp that would be able to supply all the power the speakers can handle.

I don't know which type of music you play but 6dB sound a little low.