HELP!!!! Diagnose Sub Problem

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cbarronx23

New DJ
Dec 12, 2006
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I ran my new QRx subs today with my EONs, and have a HUGE problem. I noticed that one sub is making a strange noise. It's almost like a crackling noise, but it does not get louder when the volume is raised. It's only noticible at low volume, and it's definately coming from the inside center of the sub.

I'm thinking it's a ripped cone, so I took the grille of and the cone looks like it might be ripped, but its around the center edge of the cone. It might not be ripped at all, but I need to check it out with better light.

Any other ideas what this might be? Loose connection, loose wires?

I think its still under warranty, and I'm waiting to hear back from Mike Ioia (DJ BreakZ).
 
Take the grille off and lightly push on the center of the sub. It should move smoothly. If there's any noise, it could be a misaligned cone.
 
jfactor1 said:
Take the grille off and lightly push on the center of the sub. It should move smoothly. If there's any noise, it could be a misaligned cone.
Click to expand...

Ok, thats what I did. Everything moved fine, and there was no noise.

Should I run it with the grille off and see if I can pinpoint where the noise is coming from?
 
Is this the cabinet that had the shipping damage? If it got dropped it may have shifted the magnet on the frame, but in that case you should still be able to tell by pushing on the cone as you have tried.

You might try swapping cables, too, in case there is a bad connection there. Are you running the subs paralleled?
 
cbarronx23 said:
I ran my new QRx subs today with my EONs, and have a HUGE problem. I noticed that one sub is making a strange noise. It's almost like a crackling noise, but it does not get louder when the volume is raised. It's only noticible at low volume, and it's definately coming from the inside center of the sub.

I'm thinking it's a ripped cone, so I took the grille of and the cone looks like it might be ripped, but its around the center edge of the cone. It might not be ripped at all, but I need to check it out with better light.

Any other ideas what this might be? Loose connection, loose wires?

I think its still under warranty, and I'm waiting to hear back from Mike Ioia (DJ BreakZ).
Click to expand...

This is scary news! Wow! Not good for da home team! :sqfrown:
 
audiopyle said:
Is this the cabinet that had the shipping damage? If it got dropped it may have shifted the magnet on the frame, but in that case you should still be able to tell by pushing on the cone as you have tried.

You might try swapping cables, too, in case there is a bad connection there. Are you running the subs paralleled?
Click to expand...

Thanks, but it moved fine. No, this is not the cabinet that had the damage.

APartyDJ said:
Also,
Check The Glue Around The Center Paper Cone I Had The Glue Go Bad One time.
It Made An Awful Racket...

But There Was No Damage To The Speaker, They Make A Special Glue Just For Paper Cones...

Good Luck I Hope Them Bad Boys Are Ok...
Click to expand...

It looked at first like there was some small holes around it. I took a flashlight to it but there didn't appear to be anything wrong.



I found a local EV authorized repair shop. so I'll see what they have to say.
 
APartyDJ said:
Keep Us Updated.
I Would Like To Know How EV Treats You...
Im Lookin To Buy New Mains Soon...

Thanks
John
Click to expand...

As far as mains go, the 115/75's (which I ordered yesterday from NLFX) are tough to beat. I heard the QRx 112 (12") side by side with an EAW LA212 and I can honestly tell you the QRx's outperformed the EAW's hands down. They sounded clearer, and the bass sounded tighter, and hit much harder.




::UPDATE ON SUB::

Spoke to Mike, spoke to UPS, spoke to one of the local repair shops. Sub is NOT under warranty, but the shipment was insured, and Mike swears the damage was not there the last time he used them. I'm taking it over to Consolidated Audio in Franklin Lakes tomorrow afternoon, then I'll contact UPS with the estimate, and hopefully they'll approve the repairs. Mike seems dead on with the magnet problem, but I'll know for sure hopefully tomorrow.

Even though I hope to have it back, I can run ok with only one sub for now. I've got a pair of the 115 tops coming from NLFX (not sure when they shipped them), and now a PLX3102 as well, so I'll run the 3102 bridged to the one sub, and the 3602 stereo to the tops.
 
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