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Favorite amplifiers for bass


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#81 lukeamdman

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Posted 10 March 2015 - 07:07 PM

The crest pro-lite 7.5 is strikingly similar to the peavey 7500. Honestly I run both and while the peavey looks a little cleaner and doesn't have those blinding blue lights, short of a bank of caps being upgraded to 1100uF from 600uF, there really is no major differences. The fans you most definitely will want to switch out on either model, as they share the same fans, and are both quite loud if in the same room. 

 

Do you mean the crest looks cleaner and doesn't have those blinding blue lights?


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#82 BeastAudio

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Posted 10 March 2015 - 08:01 PM

Yes I do mean the crest looks cleaner. Darnit



#83 nube

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Posted 10 March 2015 - 10:07 PM

Beast,

 

Do they measure well in terms of rolloff?  I'm also seeing that they're fairly cheap for the output.  If there's a documented fan mod, and the rolloff is solid, I may be in the market for one.



#84 BeastAudio

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Posted 13 March 2015 - 05:56 PM

The fan mod is cake. they both actually mount to a metal piece that you detach with 3 screws. The fans have a termination plug that inserts into the board. I simply cut the wires off close to the old fan, and rewired the plugs to the new fans and shrink-wrapped the connection.  fc7c3b49_IMG_3408.jpeg

 

And here is the link to the fans you would need to install for quiet operation. There is also a smaller fan that helps circulate the air as it passes through the amp. I simply unplugged this one. 



#85 BeastAudio

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Posted 13 March 2015 - 06:02 PM

Oops....Fan link  http://www.digikey.c...4751-ND/2615564



#86 Infrasonic

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Posted 14 March 2015 - 05:10 PM

What amp is that, Beast?



#87 Aj72

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Posted 16 March 2015 - 06:11 AM

What do you guys think about the Crown 9000i Macrotech amplifier? Quotes 8Ohm bridge at 6000W. I already have a Crown XLS 5000 and it is rated 20Hz with rolloff below that (how much I'm not sure). The specs say rolloff below 20Hz also for the 9000i but would this mean similar or the same to the XLS5000 rolloff? I am happy with the result to port tune using the XLS5000 but was looking at replacing my Behringer EP4000 which is power limited. The 9000i seems like it would be way more than enough power to run my Captivator but is that a bad thing if I don't use it all? I can pick up the 9000i for about $1200 used in Australia would like to know what others think about this amp.



#88 Ricci

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Posted 18 March 2015 - 03:30 PM

That is a pretty good price on a 9000i. That amp should be close to a pair of XLS 5000's on real world content, even if it may not be quite as capable of being used for welding. I doubt you'd have the circuits required to weld with a pair of XLS 5000's anyway. I don't know the roll off for sure but Crown has seemed to favor a 8Hz DC filter for their lightweight amps in years past. It should be -3dB at 8Hz at dropping rapidly below that point.



#89 BeastAudio

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Posted 19 March 2015 - 03:52 PM

What amp is that, Beast?

 

That;s the peavey IPR2 7500. The crest 7.5 looks identical but is flipped right side up. 



#90 Aj72

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Posted 19 March 2015 - 08:12 PM

That is a pretty good price on a 9000i. That amp should be close to a pair of XLS 5000's on real world content, even if it may not be quite as capable of being used for welding. I doubt you'd have the circuits required to weld with a pair of XLS 5000's anyway. I don't know the roll off for sure but Crown has seemed to favor a 8Hz DC filter for their lightweight amps in years past. It should be -3dB at 8Hz at dropping rapidly below that point.


Thanks Josh

#91 Aj72

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Posted 05 April 2015 - 10:56 AM

Anybody know anything about PROEL Amplifiers? Specifically the HPX6000? Cheap but are they a piece of crap for sub duty? Can't find much on them.




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