REL Strata III - faint crackle/pop sounds


I've been very happy with my REL Strata III for many years. However, I recently started hearing a faint crackle/pop sound coming from it whenever it is powered on.

Any ideas for what I can try to do to diagnose the problem? Any recommended repair places? I can try Sumiko (USA distributor) but I would prefer a recommendation from folks on this forum before I send it to them.

Thanks in advance!
theasianmenace
Sounds like a problem in the units crossover. I would have to guess it's a resistor gone bad. I gather someone on the Gon would have even more experience with this, and have a better idea what the problem is? The best of luck with this unit, I had one and only sold because of an issue with space.
Well, that's what I'm worried about. If I go through Sumiko or one of their dealers, it might end up costing more than I paid for the sub in the first place.

Anyone know of places here in Northern California where I might be able to take the sub to be diagnosed and repaired? I'm sure there have to be skilled, reputable places out there...

Thanks!