Originally Posted by Archaea Negatives -
*There is no advantage to not hearing port noise on a sealed design if you have to turn the sub down significantly to get away from mechanical noise at the same SPL as port noise on the competitor.
The distress on the Jamo sounds different than the distress on the DIY Dayton driver though. On the Jamo it sounds like a rubber surround is out of excursion capability or something (it's a soft change in tone and movement which is audible and sounds a bit like rubber flapping).
First of all thanks for the review. I purchased one Jamo Sub 650 back in July, just 2 weeks before you posted this review. I had whittled it down to the Jamo, Klipsch or break the bank and go HSU. At any rate I decided on the Jamo - and can attest to the mechanical noise. I listen across a wide range of decibels, and at loud volumes that noise is unbearable. It does sound like rubber flapping but when I put a very small amount of pressure on each of the three polished sides - the sound goes away. I can then crank the sub and it sounds great. My question is, is it possible the sound is caused by a weak box seal? To my knowledge this sub has no bracing. Could I potentially fix this with some sealant or a DIY bracer job? I have a friend who recommended we brace it even before the problem noise surfaced. He said it would improve the sound, but I am hesitant to take it apart if I can avoid it.
Right now I feel my options are
1. Warranty claim (be without bass for a while, probably won't fix the problem)
2. Apply silicone where the wood meets on the back panel
3. Tear the sub apart, add bracing and hope for the best
4. Sell it and start over (sadly I have a lower-paying job now and unless my interview goes well this morning, the HSU will remain a dream)
Right now I am leaning toward option 2, as it is the quickest, least intrusive choice.
Any and all feedback/help is thoroughly appreciated.