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I have 2 JL m6 10IB subwoofers in the port and starboard side of my 32 Cobia. Powered by an MHD 750 in parallel they both sound good until you really start to turn it up. One sub consistently clips before the other. I’ve tried switching them to see if it’s a wiring/ location issue and the one sub always clips before the other. I’ve never peaked the good sub because I always have to turn it down to accommodate the one. I’ve visually inspected the sub and it looks good. What could be the problem? I’m nervous I’m going to send it in for repair and they’re going to tell me it works when I know it can’t handle as much power as my other one.
 

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I have 2 JL m6 10IB subwoofers in the port and starboard side of my 32 Cobia. Powered by an MHD 750 in parallel they both sound good until you really start to turn it up. One sub consistently clips before the other. I’ve tried switching them to see if it’s a wiring/ location issue and the one sub always clips before the other. I’ve never peaked the good sub because I always have to turn it down to accommodate the one. I’ve visually inspected the sub and it looks good. What could be the problem? I’m nervous I’m going to send it in for repair and they’re going to tell me it works when I know it can’t handle as much power as my other one.

Your issue may be a difference in the enclosure size for each speaker, I know it sounds crazy but those speakers actually perform according to the enclosure size so if the speaker that is clipping first is in a smaller enclosure then the other one this could be the problem, also make sure both are ported identically. (see the JL Audio speaker enclosure specifications below)

Sealed Enclosure Specifications

Wall Thickness 0.75 in / 19 mm
Front Baffle Thickness 0.75 in / 19 mm
Volume (net int.) 2.00 cu ft / 56.6 L
External Width (W) 17 in / 432 mm
External Height (H) 17 in / 432 mm
External Depth (D) 16.25 in / 413 mm

Enclosure Notes
* The enclosure recommendations listed above are external dimensions which assume the use of 0.75 in (19 mm) thick material. If you are using 0.625 in (16 mm) thick material, subtract 0.25 in (6.5 mm) from each dimension. Do not use any material with a thickness of less than 0.625 in (16 mm) as this may compromise the rigidity of the enclosure.
* All enclosure volumes listed above are net internal volumes! Driver displacement, port displacement and brace displacement must be added to obtain the final gross internal volume. All enclosure dimensions above have already taken this into account.
* When using multiple subwoofers in a common enclosure you will need to recalculate the enclosure and port dimensions. For assistance please contact your authorized JL Audio dealer or JL Audio Technical Support.
* We recommend the use of this speaker in a bi-amplified system using high-quality satellite speakers and a high-quality amplifier. We do not recommend the use of this subwoofer with a passive crossover (coil), as this type of device will adversely affect performance.
* All specifications are subject to change without notice.

I hope this helps..... Good Luck
 
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