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And the answer is 'Yes' and Vicious-Poodle has created THE SUNFIRE TRUE SUBWOOFER SIGNATURE 12 EARTHQUAKE SOUND HYBRID MONSTER!!!! MWAHAHAHAHAHAHAH (Lightning cracklE and thunder crash!) So, about two weeks ago, I purchased on EBay, a used Sunfire 12 inch Signature with a bad amp plate for under $400 in piano black. I always wanted one and that price was a steal. When it arrived, I swapped in the plate from my 10 inch Sunfire Mk II. I was horrified to hear a terrible Death Rattle in the passive radiator. All my research showed no one sells a replacement and the odds of finding used body parts for the 12 incher are slim. I took out the PR and tried rubberized epoxy where the rubber meets the wood disk, glued around the center weight, tried everything, and still the Death Rattle. What to do. And I don't take no for an answer. While watching TV I had an epiphany: The Earthquake Sound Supernova 12 looks and works a lot like this Sunfire. Maybe that passive radiator can be bought and fit in? A search on Ebay showed that there is indeed an Earthquake Sound 12 inch passive radiator for sale. The one closest in size is the SLAPS M-12. Looking at the specs, the cut out needs to be about 1/8th inch larger. The SLAPS technology is better tech than the original passive radiator. There is no spider, glued on disk, heavy center weight that can rattle and cause issues. And it's very affordable! (The original seller on Ebay paid for it! How nice is that?) With a huge wood file in hand (see photo), I enlarged the opening enough for it to fit in snugly. Took about an hour w/ interruptions. The bolt pattern is identical to the original so no new drilling of holes is needed. All the hexagonal bolts were replaced and tightened (one bolt was stripped so I used a larger screw and nut in its place.) Everything was nice and tight so it was time to give it a try. I was beyond amazed! I did a frequency response sweep and there was huge output you feel at 20 HZ diminishing to an unbelievable 14 HZ. The SLAP-12 has like 3 or 4 inches of excursion. Where the Jurrasic World trailer would crash my Sunfire 10's, this monster had no issues. The bass was awesome. It could even do that 16HZ organ piece (Symphony No. 3 (Saint-Saëns). Since this is a better passive radiator than the original, I ordered a SLAPS M-10 for my MK II Sunfire. I think that might even fit in with less filing. I will let you know how that works and if it improves the performance. (Right now these 20+ year old subwoofers seem to easily get over-driven on new material. My theory is it's the passive radiator.) So, everyone, there is a replacement passive radiator for your Sunfire Signature 12. I will let you know in another week, if the same can be done for the 10 inch model. Best wishes and stay safe! V.P. (Here it is in action playing that annoying Bass I Love You. Note its huge excursion!)

As a 70-something novice at speaker rehab I need all the help I can get trying to figure out the correct replacement woofers and midranges that closely match OEM specs for my AR TSW-510 system. I purchased these new in 1988 and put them into storage (not climate controlled) 15 years ago. Decided to put them back into service recently but after unboxing I found the woofers disintegrated (foam, cone, etc). The midranges look like they have foam rot. Not interested in trying to re-foam the midranges due to nerve damage in my hands. I read through a 2009 post on this site and just got more confused with all the talk about crossover frequencies and what is T/S? Anyway, I'm concerned if I just drop in new speakers I'm going to lose the great audio reproduction I remember these speakers pumping out. I welcome any and all comments, pointers, etc.

I purchased a pair of AR-5s off Craiglist. Both speakers had Radio Shack replacement woofers in them. My question is this: does it make a difference if I purchase set of 10-inchers off E-bay from the era, or, alternatively, should I just go ahead and spend the $ on replacement ones off Vintage AR Parts. There's a set of AR-5 woofers on e-bay right now for $130; Vintage AR will sell new a new replacement pair for another $10. Are there any opinions about which of these woofer replacements would be better. Or, alternately, I suppose I could keep the radiocshack polycone ones.... Any suggestions would be appreciated. Thanks