oakeedokee Posted August 18, 2016 Share Posted August 18, 2016 Can anyone point me in the right direction to get replacement capacitors for my Bose 302? They're pretty old now and I can't find an exact match. Any help would be appreciated.http://i1288.photobucket.com/albums/b489/oakeedokee/WP_20160818_15_51_38_Pro_zps0mjxi83d.jpghttp://i1288.photobucket.com/albums/b489/oakeedokee/WP_20160818_14_54_41_Pro_zpshh5febrn.jpg Link to comment Share on other sites More sharing options...
Brian Posted August 18, 2016 Share Posted August 18, 2016 I reckon something like this... http://www.wilmslow-audio.co.uk/33-fd-monacor-mkp-capacitor-2270-p.asp Link to comment Share on other sites More sharing options...
chelgrian Posted August 19, 2016 Share Posted August 19, 2016 I reckon something like this... http://www.wilmslow-audio.co.uk/33-fd-monacor-mkp-capacitor-2270-p.asp Or at a rather less ludicrous mark up http://loudspeakerfreaks.com/Product.asp?Product_ID=11937 Link to comment Share on other sites More sharing options...
mojo filters Posted August 19, 2016 Share Posted August 19, 2016 I brought home some ancient (MK 2 or 3) garishly multi-coloured 301s from a pub install I worked, many years ago now. Turns out the speakers were already very old back then. The foam was mostly perished on the LF drivers, and I enquired via a local hifi shop who were Bose dealers, who eventually came back with some absurd prices. Then I spoke to a local hire shop who we used, that often sent a pair of 802s out for smaller speech only PA for smaller corporate events. They gave me a contact in either Holland or Belgium they used for parts, which was either Bose themselves or a big European distributor. I got great information and service via phone, and got model-specific drivers sent out to replace mine, all for around £80 including quick delivery. I was genuinely impressed with the results too - I'd never cared for Bose's snake oil marketing and peculiar acoustic philosophies, but despite the pair of little paper HF drivers in my 301s to achieve the curious "direct / reflecting" properties, they sounded much better than expected and got very loud without distorting, for a hifi speaker at least. I don't have the details now unfortunately, and as this was well over 10 years ago they may no longer offer such service, or even exist! But if I ever wanted more spares for Bose kit I'd try them again if possible. The person I spoke to certainly knew all their loudspeakers very well, as we ended up chatting nerdy sound tech stuff about the interesting designs used in both professional and hifi type Bose speakers. Whether they'd have specific information available about individual parts such as these replacement caps, I wouldn't want to assume - but they might be able to access circuit diagrams to identify the correct capacitor. They might still be able to supply a whole replacement crossover unit for an old loudspeaker model if that became the only option, though that's bound to be significantly more expensive. Good luck, I hope you manage to fix your problem! Link to comment Share on other sites More sharing options...
Peter18 Posted August 19, 2016 Share Posted August 19, 2016 Is there anything to suggest that the capacitors have changed in value? Unlike electrolytic capacitors, polyester ones usually have a long lifespan.If it ain't broke..... Link to comment Share on other sites More sharing options...
alistermorton Posted August 19, 2016 Share Posted August 19, 2016 I reckon something like this...http://www.wilmslow-audio.co.uk/33-fd-monacor-mkp-capacitor-2270-p.asp Or at a rather less ludicrous mark up http://loudspeakerfr...roduct_ID=11937 Isn't that a different value? The original is 35µF, Brian has linked to the nearest equivalent, a 33µF, the cheaper link is to a 3µ3F though. The 33µF from Loudspeaker freaks is still cheaper, but it's a touch over 6 quid or so. Link to comment Share on other sites More sharing options...
oakeedokee Posted August 19, 2016 Author Share Posted August 19, 2016 That's really useful. Thanks for the suggestions. By the time I've paid postage from the US it might be cheaper to get the ones from Wilmslow. Link to comment Share on other sites More sharing options...
bruce Posted August 19, 2016 Share Posted August 19, 2016 30 uF at rapid for £6.80 https://www.rapidonline.com/lcr-fp-ca-30-au-630v-30uf-5-polypropylene-audio-grade-capacitor-10-3288 Link to comment Share on other sites More sharing options...
chelgrian Posted August 19, 2016 Share Posted August 19, 2016 Isn't that a different value? The original is 35µF, Brian has linked to the nearest equivalent, a 33µF, the cheaper link is to a 3µ3F though. Grr I meant to link to http://loudspeakerfreaks.com/Product.asp?Product_ID=11939 which is hardly cheaper than Wilmslow audio, sorry. BEC themselves no longer make a suitable item, RS sell a bunch of things with the right numbers but they are all for motor control no idea if they are in any way suitable. Link to comment Share on other sites More sharing options...
robocow Posted August 22, 2016 Share Posted August 22, 2016 30 uF at rapid for £6.80 https://www.rapidonl...pacitor-10-3288 I vote this, good find :) Link to comment Share on other sites More sharing options...
alistermorton Posted August 22, 2016 Share Posted August 22, 2016 RS sell a bunch of things with the right numbers but they are all for motor control no idea if they are in any way suitable. I'm sure Russ would tell you that using motor control caps in audio applications will result in an overtly mechanical sound, losing the smoothness and adding a whining sound at startup. Link to comment Share on other sites More sharing options...
sandall Posted August 22, 2016 Share Posted August 22, 2016 I'm sure Russ would tell you that using motor control caps in audio applications will result in an overtly mechanical sound, losing the smoothness and adding a whining sound at startup.Would WD40 help restore the smoothness? Link to comment Share on other sites More sharing options...
DrV Posted August 22, 2016 Share Posted August 22, 2016 I'm sure Russ would tell you that using motor control caps in audio applications will result in an overtly mechanical sound, losing the smoothness and adding a whining sound at startup.Would WD40 help restore the smoothness?Yes, but only the audio grade stuff in the gold plated tin Link to comment Share on other sites More sharing options...
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