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Beater
08-19-2008, 10:02 PM
ok - my venerable and most loved kef k160's have lost one of their 8" drivers. They are not made anymore, so I can't just pop one in. I believe that the voice coil needs to be replace or re-wired

Does anyone have a line on a good speaker repair person here in Denver city denver?

Thanks in advance!

I also need some caps and such replaced on an nad 317 if anyone can help with that...

j

DaveInDenver
08-20-2008, 06:31 AM
I'd call Gold Sound, down on Broadway at Quincy and ask.
http://www.goldsound.net/


There is a place over on Alameda and Lipan that does speaker repairs, but I've heard they can be variable in the quality of their work and are sorta jerks. Have to pull out the phone book to find their name.


Speaker Parts Supply:
http://www.mwaspeakerparts.com/
http://www.simplyspeakers.com


Repair Place (it's in Florida but they have some parts):
http://www.speakerex.com/


As far as your cap issue, these places is where I'd be looking.
General Electronics Supply:
http://www.tubesandmore.com
http://www.madisound.com
http://www.partsexpress.com
http://www.bestspeakerparts.com

I have personally used Antique Electronics, Madisound and Parts Express.

Beater
08-20-2008, 08:00 AM
Problem is dave, the one thing I am no good at is this level of electronics. Sure I can test a circuit, but on this level of circuitry, I am lost. I can get a replacement amp for under 200.00, and I have been quoted around 200.00 site unseen to have the amp repaired..

Suggestions?

I hadn't thought about gold sound as repair, I only thought them retailers and a diy shop.

thanks.

j

60wag
08-20-2008, 08:29 AM
For replacement speaker parts, I've used MCM. They don't have the really odd rare stuff but they have nice quality drivers at good prices.

DaveInDenver
08-20-2008, 08:47 AM
Problem is dave, the one thing I am no good at is this level of electronics. Sure I can test a circuit, but on this level of circuitry, I am lost. I can get a replacement amp for under 200.00, and I have been quoted around 200.00 site unseen to have the amp repaired..

Suggestions?

I don't mind replacing parts on your amp, although the level of troubleshooting I can do at home is pretty limited since I don't have my own o'scope. I tend to bring stuff into work on weekends... But if you know what needs to be replaced or have schematics, we can muddle through.

Speakers, never rewound a voice coil. I know it can be done, just never tried. That's sort of why I thought about Gold, they sell replacement drivers and might have some ideas. AFAIK they sell Morel, Polydax, SEAS and Vifa. If I was a betting man (and I am), unless the KEF K160 was super high end, they probably use one of those brand drivers. But Gold would be the most likely shop to know realistically about good quality gear repairs. You know, if KEF doesn't sell replacement parts for the K160, I'd just call them and ask what drivers they'd recommend. It'll probably be something like a Morel Neolin 8" driver or something. Is the cone paper or composite?

I hadn't thought about gold sound as repair, I only thought them retailers and a diy shop.
I don't think Gold does repairs, but I'd guess they'd know if there are any decent shops locally. Also Listen Up has their repair facility up at the store on Pearl or maybe Home Electronics Repair down in Englewood. Both of them do more TVs and receivers, but might have a better idea about speaker repair. That also reminds me, I'd also ask up at Cherry Creek Audio, with all that expensive junk, surely the doctors and lawyers might opt once in a while to have stuff repaired rather than just throw it out.

DaveInDenver
08-20-2008, 09:05 AM
Found these guys searching for K160 info. Never heard of them and they are in New York someplace. But they apparently service obsolete KEF.

http://www.adsspeakers.com/Kef.htm

trucruiser
08-20-2008, 09:36 AM
I would say just get online and find a decent replacement driver for it, 8" drivers are pretty common and there are many options that would rival what you have, after all most of the performance comes from the enclosure design. Just make sure that you get a driver with the same Ohm rating.

Beater
08-20-2008, 09:46 AM
Found these guys searching for K160 info. Never heard of them and they are in New York someplace. But they apparently service obsolete KEF.

http://www.adsspeakers.com/Kef.htm

Yeah - looked at them.. 140.00! plus freight for the driver. The K160 is fairly high end, and it uses a sp-1248 mb160 driver from KEF. Poly composite with butyl surround. Indestructable unless your hit it with repeated 1200 watt peaks from a cracking channel... amp headroom, great for music, bad for when a circuit goes out... I had been running 214/317 in mono-block config, which is about 250 nominal... oops

I amin posession of schematics, but they are REAL rough scans. There are some articles about what usually blow.

DaveInDenver
08-20-2008, 09:51 AM
I would say just get online and find a decent replacement driver for it, 8" drivers are pretty common and there are many options that would rival what you have, after all most of the performance comes from the enclosure design. Just make sure that you get a driver with the same Ohm rating.
There's more to picking the right driver than just the diameter, at least when you have the supremely tuned ear of a guy like John.

Besides nominal impedance, you need to match free air mechanical resonance; electrical, mechanical and overall Q of the driver; equivalent cone volume; DC coil resistance. The enclosure is designed to work with the driver's parameters, so a vented cabinet will work best with certain types of drivers, where a sealed cabinet will work best with others. In the case of the KEF K160, it used a passive radiator and so it's not quite sealed and not quite vented. The electrical specs have to be about the same for the cross over network to work right, although just matching impedance and Q should be fine.

Here's some stuff about DIY speakers:
http://sound.westhost.com/tsp.htm
http://www.silcom.com/~aludwig/Loudspeaker_construction.html
http://diyaudioprojects.com/Speakers/speakers.htm
http://www.audiogrid.com/audio/
http://home.earthlink.net/~etunstal/diy.htm

DaveInDenver
08-20-2008, 09:55 AM
Yeah - looked at them.. 140.00! plus freight for the driver. The K160 is fairly high end, and it uses a sp-1248 mb160 driver from KEF.
Are those the KEF co-axial suckers?

Beater
08-20-2008, 10:33 AM
Are those the KEF co-axial suckers?

no, uni-q's would be easy....


http://www.kef.com/history/1990_1/model_103_4.asp

http://www.kef.com/history/1990_1/images/k160.jpg