Preamp level gain needed for Behringer NU6000 - AVS Forum
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post #1 of 11 Old 07-16-2013, 12:18 AM - Thread Starter
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Hi All,

I just received my Behringer NU6000 Amp. I had wanted to use it to replace my 250watt plate amp running my subs. My receiver is a Denon AVR4311CI. The Sub preout works great for subs to begin with but now I find the gain on the receiver does not push out enough signal required to push this amp to do much of anything. I get the idea of whats going on and have read here on the ProAmp rating thread somewhere in there I believe I read someone was using some box to gain match the receiver with the amp. It wasn't a Samson S-covert. Which is difficult to figure out the simple solution needed for this signal gain to happen from the one's they make.(cost was an issue from the one's I looked at. If someone could recommend one from them or one that you folks use on their Proamp's and recommend that doesn't break the bank just to use this power amp.

From Denon subout 2 RCA to...
Input used is RCA to 1/4 3pole (stereo) plugged into input A and B Channel
Output Channel A and B using Speakon connector (1+ , 1-) on each channel
I've tried adjusting Subwoofer output to +12 and the lights never flicker on the NU6000 my sub slightly moves.
Thank you all.

Chris

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post #2 of 11 Old 07-16-2013, 12:50 AM
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The cleanbox pro is what people have used to boost the signal from AVR to amp

http://www.parts-express.com/pe/showdetl.cfm?partnumber=245-868
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post #3 of 11 Old 07-16-2013, 01:35 AM - Thread Starter
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Thank you for the reply. Would you happen to know if the frequency response slopes very fast below the 20HZ mark? Or is it a wall cutoff? I'm surprised it's not stated wider like 5hz to 50k or 100K. My subs go lower then 20Hz flat so I wanted to make sure this covers those areas.

Chris

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post #4 of 11 Old 07-16-2013, 10:11 AM
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I dont know for sure what the roll off is. It wont be a brick wall though.
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post #5 of 11 Old 07-16-2013, 11:49 AM
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There is a frequency response chart in this thread. It looks like it is down about 2db at 10hz. http://forum.speakerplans.com/behringer-inuke-nu6000-vs-kam-kxd7200-bench-tested_topic69202_page2.html
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post #6 of 11 Old 07-17-2013, 04:54 AM
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The iNuke does not roll off below 20hz, but rather, some sort of the EQ'ing features do not go down below 20hz, but that can be corrected, I am just not sure how, and I may be wrong about it being the EQ portion that only goes down to 20hz, but I am 100% sure that this amp does indeed go below 20hz.
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post #7 of 11 Old 07-17-2013, 05:05 AM
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Quote:
Originally Posted by Martycool007 View Post

The iNuke does not roll off below 20hz, but rather, some sort of the EQ'ing features do not go down below 20hz, but that can be corrected, I am just not sure how, and I may be wrong about it being the EQ portion that only goes down to 20hz, but I am 100% sure that this amp does indeed go below 20hz.

 

 

While for a DCX2494, this thread may help, since they are both Behringer products and from the DSP function similar.

 

(I have not tried it myself, though.)

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post #8 of 11 Old 07-17-2013, 01:23 PM
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He didn't say he had the DSP model.
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post #9 of 11 Old 07-17-2013, 01:55 PM
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Why not just get a med-high end headphone amp and use it as a pre-amp?
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post #10 of 11 Old 07-17-2013, 01:56 PM
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Quote:
Originally Posted by Mike-ht View Post

He didn't say he had the DSP model.

 

 

Good point! I assumed because he was referring to "some sort of the EQ'ing features". Does a non-DSP model have any EQ-ing?

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post #11 of 11 Old 07-17-2013, 03:41 PM
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Actually, that was in response to Martycool007, since Chris didn't mention DSP. I realize now that Chris was asking about the frequency response of the cleanbox pro, not the inuke. I don't know about the cleanbox pro, but the Henry Engineering Matchbox II looks like it doesn't have any rolloff at all. There is a similar discussion here:
http://www.avsforum.com/t/1479539/nwcgrads-sealed-subwoofer-system-design-and-build-thread#post_23484645
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