SpeakerTalk

tolstoy · Posted: Wed Aug 31, 2005 9:55 am Post subject: Corellis

I have a pair of these animals which have been sitting in my cupboard for a number of years now following the failure of the T27 tweeters. I acquired them many years previously in a similar condition, both units were dead. I eventually got round to having them rebuilt by KEF, however after several months they again blew. End of story. Start of dust gathering. I love the sound of these beasts and really want to put them back on the road but need to figure out what the problem is here. My guess is that the crossovers have deteriorated over the years and need replacing. Having looked at the SP1052's one component does indeed seem to bear this out with what appears to be a degree of oxidation (well, its a green mould type stuff, I'm no expert here). Would I be correct in my thinking and are they directly replacable with the same component, a modern equivalent or can I just swap out the offending 'thing'. I'm confident with a soldering iron but would need to know what the 'thing' is. Also I need to repalce the T27s, is this a problem?

Thanks in advance for any help you can offer.

ColinR · Posted: Wed Aug 31, 2005 11:44 am Post subject:

tolstoy · Posted: Wed Aug 31, 2005 12:48 pm Post subject:

Wow. I'm impressed. Can't say I have much of a clue of half what you describe, 'motorboating', 'bottle job'? But your comments do help point me in a new direction. The amp I have is a pretty hefty Sony 90w TA-F630 esD from the 80's, however recently I have been experiencing dodgy contact on the phono stage, leading to blistering hum on occasions. This is fairly recent but perhaps could have been having impact on the speakers previously? From what you suggest I think I should sort the amp out first, then look again at the next step. Polyswitches? What do they do?

Again, thanks for the speedy and informative (well, if you explain the above terms it will have been) response:-)

tolstoy · Posted: Wed Aug 31, 2005 3:34 pm Post subject:

Okay, I've discovered what Polyswitches do:-)

ColinR · Posted: Wed Aug 31, 2005 6:50 pm Post subject:

tolstoy · Posted: Wed Aug 31, 2005 8:28 pm Post subject:

Learning is a great thing. eh? Smile

I see there are T27's on ebay at about the cost I'd expect so I'm on the way to getting these guys back on track. You were spot on about the resistor by the way.

Thanks for your help, I'll be bookmarking you for the future.