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Richie
Senior Contributor 100+
Joined: 06 Nov 2010
Posts: 108
Location: Northamptonshire
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 Posted: Sat Jan 08, 2011 8:23 pm Post subject: Kef 104ab acoustic contour control |
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| Kef 104ab, is it possible/worth by passing the acoustic contour control ? |
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audiolabtower
VIP Contributor 500+
Joined: 06 Jan 2009
Posts: 686
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| Posted: Sat Jan 08, 2011 10:16 pm Post subject: |
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| try switch cleaner on the contacts, or solder a shorting wire between the contact terminals and see if you can hear a difference? |
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ColinR
Über Contributor 1000+
Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire
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| Posted: Tue Jan 11, 2011 2:39 pm Post subject: |
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| Quote: | | try switch cleaner on the contacts |
For serious gunk on switches and PCBs a fine brass wire clothes brush (for velvet) cleans up contacts nicely  .
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This post or any other information supplied to this website or any other by myself is not available for any form of commercial purpose i.e. to hi-fi magazines or as sales and marketing material for sleezeBay or Audiodogging pimps and the like. |
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Richie
Senior Contributor 100+
Joined: 06 Nov 2010
Posts: 108
Location: Northamptonshire
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| Posted: Tue Jan 11, 2011 4:21 pm Post subject: |
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Thanks for that, I'm not sure there is anything actually wrong with the switchs I just wondered if by passing them would improve the sound.
Anyway new caps arrived today so I have to pluck up the courage to try soldering them on....... fingers crossed. |
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T.O. Chef
Senior Contributor 100+
Joined: 31 Aug 2007
Posts: 187
Location: Toronto Canada
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| Posted: Tue Jan 11, 2011 9:04 pm Post subject: |
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Love the Avatar white 104's Richie
Do you have a pair of those? What's the finish applied with? Is it a plastic, a paint?
Do let us know how the re-cap goes please. Are you using all electrolytic cap's? Alcap? Are you changing the 0.6uF to a Solen?
I for one am quite interested to hear your take on the results.
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speakerguru
Über Contributor 1000+
Joined: 18 Nov 2005
Posts: 1192
Location: Green Hut, Tovil
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| Posted: Wed Jan 12, 2011 12:40 pm Post subject: |
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| Richie wrote: | | .... I'm not sure there is anything actually wrong with the switches I just wondered if by passing them would improve the sound... |
Do you mean will two soldered joints sound better than one metal to metal contact? The answer is only if the switch is dirty or corroded.
Some experiments to try:
Spray the switch with cleaner/lubricant and see if you can hear a change.
Solder a link across the contacts and see if you can hear a difference.
What the switch does is select a different tap on an inductor, so you could also try to bypass with a link on the pcb.
I very much doubt that you will hear anything provided the switch has been turned a few times to scrape away any oxide. You might also check the fuses, while you're at it. The ends can tarnish over time. |
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Richie
Senior Contributor 100+
Joined: 06 Nov 2010
Posts: 108
Location: Northamptonshire
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| Posted: Wed Jan 12, 2011 4:49 pm Post subject: |
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T.O. I think its a paint finish, what ever it is its very good. Seems it was a Kef option way back when.
I just bought the Falcon Acoustics 104ab cap. replacement kit (x2)
I'll try the things you suggest guru, I thought many people by-passed the fuse to ? |
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Richie
Senior Contributor 100+
Joined: 06 Nov 2010
Posts: 108
Location: Northamptonshire
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| Posted: Wed Jan 12, 2011 4:57 pm Post subject: |
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[img]http://myhifi.homestead.com/T27-Tweeters.html[/img]
Here's another thing, I have just replaced a dud tweeter, but the replacement has a screw in the back, whats that about ?? |
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Richie
Senior Contributor 100+
Joined: 06 Nov 2010
Posts: 108
Location: Northamptonshire
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| Posted: Thu Jan 13, 2011 8:05 pm Post subject: |
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| I wish I could get these hot links to work..... any idea's ? |
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T.O. Chef
Senior Contributor 100+
Joined: 31 Aug 2007
Posts: 187
Location: Toronto Canada
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| Posted: Thu Jan 13, 2011 11:53 pm Post subject: |
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Ritchie .. you have a PM
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