I have a Rel R-505. I bought it used & it worked fine. Lately it's developed a thumping sound instead of the low bass tones. It's really annoying so I unplugged it. I've checked the settings & switched the polarity. No change. Any ideas what went wrong.
Sub drivers have a limited lifespan in comparison to other drivers. They take a real beating. They can also fail in a number of ways. I keep a spare driver handy.
The lesson is to avoid used subwoofers. If you have to buy used make sure drivers are still available.
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