longdrive03 Posted November 29, 2010 Share Posted November 29, 2010 I bought one of these stage monitorsat an estate sale. Couldn't test it at the sale but got it home and found out the 15" woofer vc is frozen. The HF driver is strange because there is no back plate to cover the 2" diaphragm which fires into th 3/4" horn opening. There are three screws on the raised rim around the diaphragm. It works in this condition Question: Is this by design or did someone not replace the back plate on the driver??? I'll post some pics. If it does need a back plate can I just make one and attach to the back with a little foam rubber inside? I may have to replace with a Klipsch driver I have laying around. Thanks Quote Link to comment Share on other sites More sharing options...
djk Posted November 29, 2010 Share Posted November 29, 2010 There is supposed to be a flat aluminum plate on the back of the HF driver. http://cgi.ebay.com/Diaphragm-Yamaha-JA4201-JA4204-JA4207-JA4208-8-ohm-/380289900592?pt=LH_DefaultDomain_0&hash=item588b0b6030 You can buy a good aftermarket diaphram for about $50, I would use http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-034 woofer, the Klipsch will not match the network and won't have enough midrange. Quote Link to comment Share on other sites More sharing options...
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