Hi There
Via fleaBay, I have come into possession of a pair of Coral BX-2000's.
(5-speaker, 3-way).
The cabinets are in first class condition, and the drivers all seem good also.
Problem is: the sound seems to lack "sizzle". All the drivers appear to be making sound.
Given the age of the speakers, I suspect the XO components may have wandered off tolerance.
There are 3 caps, all "Unicon" NP: 2, 16 and 47 mfd
There are 4 resistors, all the same type:
3k, 4A; and
5k, 15k and 15k - all 3A
(I'm ruling out the two inductors as culprits.)
Is it possible to say which components are the likely offenders? (caps or resistors?)
Are (/were) the Unicon caps pictured regarded as high quality? ie Can someone suggest a suitable brand of modern replacement? (Let's say good quality, but not stupidly expensive, ok?)
Thanks
Doug
Via fleaBay, I have come into possession of a pair of Coral BX-2000's.
(5-speaker, 3-way).
The cabinets are in first class condition, and the drivers all seem good also.
Problem is: the sound seems to lack "sizzle". All the drivers appear to be making sound.
Given the age of the speakers, I suspect the XO components may have wandered off tolerance.
There are 3 caps, all "Unicon" NP: 2, 16 and 47 mfd
There are 4 resistors, all the same type:
3k, 4A; and
5k, 15k and 15k - all 3A
(I'm ruling out the two inductors as culprits.)
Is it possible to say which components are the likely offenders? (caps or resistors?)
Are (/were) the Unicon caps pictured regarded as high quality? ie Can someone suggest a suitable brand of modern replacement? (Let's say good quality, but not stupidly expensive, ok?)
Thanks
Doug
Attachments
those resistors will be OK, just get replacement NP caps from your local Jaycar, or use plastic caps for the 2 uF
Thanks Pete.
Yes, my fall-back position was to do as you suggest, but I was wondering whether anyone was of the opinion that a little more money may bring a discernible improvement. Can I assume you're skeptical of same?
cheers
Doug
Yes, my fall-back position was to do as you suggest, but I was wondering whether anyone was of the opinion that a little more money may bring a discernible improvement. Can I assume you're skeptical of same?
cheers
Doug
A slight technical difficulty ...
OK so I have recapped the XO's. (Courtesy of Jaycar, as advised)
Still not much treble, so I come to the sad conclusion that the previous owner (or one of them, anyway) must have blown the tweeters ... All 4 of them!
(oh bugger!)
The tweeters are 2H-20A's. 16 ohm and sealed back cones.
Would anyone like to venture an opinion as to whether is is possible to repair such drivers?
Cheers
Doug
OK so I have recapped the XO's. (Courtesy of Jaycar, as advised)
Still not much treble, so I come to the sad conclusion that the previous owner (or one of them, anyway) must have blown the tweeters ... All 4 of them!
(oh bugger!)
The tweeters are 2H-20A's. 16 ohm and sealed back cones.
Would anyone like to venture an opinion as to whether is is possible to repair such drivers?
Cheers
Doug
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