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Topic: Need subwoofer help!

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cleightHome userMember since 2009
Good evening my fellow beat mixers,

I just purchased a Peavey PR-Sub tonight to compliment my setup and need some assistance in making sure I hooked it up correctly. When we ran it tonight for about 15 minutes we started to smell a wood burning smell(i don't think this is right from my days with car subwoofers). Is the subwoofer defective as I don't believe we "over" powered the sub by any means. Please see the specs of my equipement below.

American DJ 6 channel mixer
Peavey PV-900 Amplifier
2- Peavey PR-12's
Peavey PR-Sub

It was connected as follows:

Channel "A" on amp was set to 150HZ low pass filter, gain 3/4 up going to PR-Sub
Channel "B" on amp was set to full crossover, gain 1/4-1/2 up going to first PR-12 then pararell to second PR-12

Everything seems to be working fine and sounded decent(needed some EQ tweaking), I'm just worried whether this was the correct way to hook this sub up and about the smell it was creating.

Thanks in advance to any knowledge someone can shine on this particular issue.
 

Posted Thu 10 Jun 10 @ 8:47 pm
If you want your system to sound good, You need another amp. Channel A & B are just for 2 of the same speakers Or Subs. Not 1 subwoofer on A and 2 speakers Paralell on B. The Impedance on the subwoofer stays the same because its going out directly to the sub from channel A. Channel B is hooked up paralell down to 4 OHMs. Maybe thats why your amp smells burned because you have two differnt Impedances running at the same time from the same single amp. Its supposed to be 1 single impedance at a time and not two different at once.


Here is My Setup. I have amp 1 for the speakers & Amp 2 for the subwoofers. ( Amp 1 is now a QSC Plx 2402 & Amp 2 is now a QSC Plx 3002) I am using a DBX crossover. If your amp has an adjustable fliter, then you dont need a Crossover.

 

Posted Thu 10 Jun 10 @ 9:15 pm
cleightHome userMember since 2009
It wasn't the amp that smelled burnt it was the subwoofer, I could smell it coming out of the vent port on the sub.

Thanks for the suggestion, I was hoping I could get away without another amp, but i guess not :(
 

Posted Thu 10 Jun 10 @ 10:06 pm
From what you stated I would say that you had everything setup ok, maybe your sub is faulty.
 

Posted Fri 11 Jun 10 @ 5:30 am
If your sub was purchased new, I would take it back to the store. If it is used, you will need a screwdriver because I'm sure you will not be getting your money back. The PR-Sub speaker has a plastic cabinet so, a wood smell is confusing. As Caliente said, you need another amp. You are grossly underpowering that speaker. There are posts about the amp to speaker power ratio. You should check them before buying another amp. Basically your amp should give you 1.5x to 2x the power of your speaker for best results (your amp is doing 180w)

If you are comfortable with a screwdriver here are some things to check (most speakers open from the front):

1. Check the wiring inside. If you see any breaks in the wire or any burnt insulation, you should replace the wire.
2. Your speaker has a built in crossover. Look for something with wires going to and from it with round things and probably a wire coil on it. If there are any burnt spots on it, It's going bad.
3. Smell the back and front of the woofer (the back has a magnet). It is possible that you sent distortion to the amp by using an underpowered amp and this could have overheated the voice coil.

That's all I can think of. I hope this helps.
 

Posted Fri 11 Jun 10 @ 6:12 pm
The Peavey amp you are using pushes 180 watts in 8 Ohms and your sub handles 400 watts rms & 800 watts peak. The amp is not pushing enough power to sub because you should be pushing at least 400 watts rms or more. You can get another Peavey Amp of the same model and hook it up in bridged mono. It will push you sub at 600 watts rms 8 Ohms.
 

Posted Fri 11 Jun 10 @ 8:07 pm


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