Re XXX = Loose Motors?

[i3abyjay25 10+ year member]

what all comes w/ the recone?

i just got back from a show and on the way to the show i noticed 1 of my subs started to sound like crap and when u try and push in on the cone, it almost felt like it was locked up...well, i went ahead and competed, figured what the heck, blow it and just go ahead and get a recone...today when i pulled out the sub, i check the coils, they still read good but i noticed that the motor was loose from the basket and about 5 bolts was comeing out...what kind of damage and what would cause this?

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[mazdakid 5,000+ posts]

that happened to one of my pbx 15's a few times. i knew i wouldnt get much for it, so i just put a strap holding it on after it was lined up, and used some kind of stuff like jb weld to hold it together

 

[UndercoverPunk 5,000+ posts]

I would think that would be covered under warranty if you have active still. If not you should be able to get that fixed while getting it reconed.

I would strongly suggest you let RE fix it... I'd feel better knowing they took care of it rather than trying to JB weld it myself....

 

[AznRevlAzn 10+ year member]

re bolt and use loctite (red) //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I think you created a massive amount of heat from the coils, which weakened the current loctite and the vibrations loosened the motor... ...somehow. It doesn't sound like a one nighter thing, it sounds like something that take alot of time/abuse (note i am not at all accusing you of abusing a sub it's just a factor)

 

[UndercoverPunk 5,000+ posts]

re bolt and use loctite (red) //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif he won't be able to do that w/o removing the softparts.... which = re-cone.

 

[Feandil 10+ year member]

//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif he won't be able to do that w/o removing the softparts.... which = re-cone.

yea agreed here that it should be professionally rebolted and is probably covered under warranty

reconing speakers yourself is a good deal harder than just realigning the motor

 

[i3abyjay25 10+ year member]

yeah, sub sent back out to RE today for a re-cone....

hopefully it will be back before Feb 3rd-5th for some db drag shows...

 

[DJ Kontakt 10+ year member]

the subs are so powerful, that they crack the glue that lock the bolts in place, they come unscrewed, and off comes the motor!

 

[helotaxi 5,000+ posts]

the subs are so powerful, that they crack the glue that lock the bolts in place, they come unscrewed, and off comes the motor!

Really?!? Wow, considering that a sub is only as powerful as the amp driving it and each 1600W is 1 hp, how do engines stay together?

More likely there was either insuffucient thread locker put on during manufacture or the act of driving the car around combined with a lack of support for the motor structure worked the screws loose or some combination of the two.

 

[CBFryman2 5,000+ posts]

Ummm...is it just me or is 1hp = 746w?

 

[audioholic 5,000+ posts]

1 horsepower = 745.699872 watts

A sub is not only as powerful as the amp driving it. Certainly the speaker's specs affect output potential, otherwise we'd all be running the same subs an instead arguing over which amp was the 'loudest'. Dont forget driver efficiency plays a big role in actual output (not to mention enclosure size/alignment/tuning).

 

[helotaxi 5,000+ posts]

Going from old memory with obviously didn't serve me correctly but the point remains, at 100% efficiency, a sub still doesn't create power. 1kW into the sub is going to equal less than 1kW of mechanical force. Hook the most powerful car amp made (about 10kW from what I've seen) and you're going to get less mechanical power than the typical B&S engine on a riding mower. Any way you look at it, it isn't breaking thread locker. You're looking at either improper manufacture (bad tapping, inadequate thread lock during initial assembly, improper torque, stripped threads, etc...) or an external force causing the problem, not the sheer "power" of the sub.

 

[CBFryman2 5,000+ posts]

I wonder what toque spec on the bolts are. Manifold bolts alone are generally over 15 lb-ft, but i understand what you're saying. plus the motor doesnt stand up to alot of vibtration, most of the forces on it are contantly changing linear force on the bolt not alot of side to side motion and no flex which is what generally starts bolts loose from what ive seen.

 

[audioholic 5,000+ posts]

On large motored subs like a XXX, unless its mounted vertically, it should have a motor support built into the enclosure (also doubles for bracing). This takes alot of the lateral stresses off the frame/motor assembly.

 

[Spkrman]

what all comes w/ the recone?i just got back from a show and on the way to the show i noticed 1 of my subs started to sound like crap and when u try and push in on the cone, it almost felt like it was locked up...well, i went ahead and competed, figured what the heck, blow it and just go ahead and get a recone...today when i pulled out the sub, i check the coils, they still read good but i noticed that the motor was loose from the basket and about 5 bolts was comeing out...what kind of damage and what would cause this?

that should definitely be covered under warranty, manufacturing defect. Not the first time I've seen that happen.