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Post by saltyguy01 on Sept 5, 2021 22:21:18 GMT
Hi All, Some Q's:
1) How do I know if I need to get the capacitors changed in the crossover?
2) If I do need to, how/where do I access them?
3) Is it a big / expensive deal?
Thank you in advance.
Geoff
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Post by MartinT on Sept 6, 2021 5:24:00 GMT
1. You won't know for sure, but if they're 30+ years old they may be past their best, especially bi-di electrolytics
2. Can't answer that, I'm afraid
3. It need not be. Ansar Supercaps are very good and not too expensive. You need to have soldering skills, though
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Post by saltyguy01 on Sept 6, 2021 22:19:06 GMT
Thank you kindly Martin.
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Post by ajski2fly on Sept 9, 2021 6:12:31 GMT
There is some useful capacitor testing info here www.ifixit.com/Wiki/Troubleshhoting_logic_board_componentsMirage are very nice speakers, you will probably need to carefully remove the bass speaker drivers held in place with screws to gain access to the crossover/wiring. Be careful if you choose to have a go. As already said 20+ years and they probably are degrading, some old style caps, paper wound in oil for sample, degrade with time, irrespective of use. |
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Post by ChrisB on Sept 9, 2021 6:57:24 GMT
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Post by saltyguy01 on Sept 10, 2021 8:32:08 GMT
Thank you for that feedback. I have taken all the 10 drivers out of my 2 Mirage M3si's and sent them away for servicing inc new surrounds, Ferrofluid etc. I saw the capacitors etc screwed into the side of the speaker. They looked very difficult to get at. There were further wires running to the base of the speakers. I decided not to mess with them - looked a bit intimidating to a novice like myself. I am expecting the serviced speakers to come back pretty much close to "as new" and look forward to an instant improvement (the surrounds were knackered!). A pity I could not get the capacitors serviced, but I will live with it.
Cheers, Geoff
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Post by ajski2fly on Sept 10, 2021 10:57:01 GMT
Thank you for that feedback. I have taken all the 10 drivers out of my 2 Mirage M3si's and sent them away for servicing inc new surrounds, Ferrofluid etc. I saw the capacitors etc screwed into the side of the speaker. They looked very difficult to get at. There were further wires running to the base of the speakers. I decided not to mess with them - looked a bit intimidating to a novice like myself. I am expecting the serviced speakers to come back pretty much close to "as new" and look forward to an instant improvement (the surrounds were knackered!). A pity I could not get the capacitors serviced, but I will live with it. Cheers, Geoff As you have plenty of time whilst the drivers are refurbished why not investigate if there is a crossover board inside the cabinets, you could do this using a mobile phone camera to take a photo pointing downwards and then one upwards, hold the phone just inside the bass driver port/hole. It may be that the resistors/capacitors as you say are purely mounted on the side of the drivers, if that is the case then it should not be too hard to carefully remove and replace them with some new good ones. If you are not confident doing this then there should be someone local who could do it for you. The wires going to the base of the cabinets may just go down to the rear of the cable posts, but there may be a crossover board in there. www.hificollective.co.uk/components/capacitors.html is always good for components, they are helpful as well. I would at least get the caps tested, if they are on their way out, which is likely if 20+ years, replacing them is likely to make quite a difference. If you do get stuck I know a very good speaker chap john@loudspeaker-design-restoration.co.uk www.loudspeaker-design-restoration.co.ukCheers Adrian |
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Post by saltyguy01 on Sept 20, 2021 22:17:30 GMT
Thank you Adrian, Yes, I had a local audio technician come around for a look at it. He backed off after looking at it.
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Post by ajski2fly on Sept 23, 2021 11:05:46 GMT
I would see if you can find someone more competent if possible, it would be shame not to replace any ageing caps whilst you can. Have a word with John, as above he is very knowledgeable and helpful.
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