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Problem with SP1032 crossovers

 
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tolstoy
Junior Contributor 10+


Joined: 31 Aug 2005
Posts: 16
Location: London

PostPosted: Tue Oct 04, 2005 6:11 pm    Post subject: Problem with SP1032 crossovers Reply with quote

I've recently replaced all the capacitors on my Corelli speakers following advice from here (Colin?), however I now have a slight problem. I wouldn't claim to be an expert at soldering but I feel I've done a resonable job, alas both speakers have ended up sounding different, not wrong mind... but different.

I have one bass driver which sounds very bright whilst the other is more bass so, I'm guessing that I have a bad joint(s) somewhere in one of the crossovers, but which one? No doubt someone will suggest I test the capacitors on the board with a meter, alas although I have one I've never worked out how to use it! So how do I get round the problem? I know I could take them both apart again but that doesn't mean I'll do any better a job second time round. If I knew which drive was 'wrong' it would narrow my options, should the bass drives on the Corellis be pure bass or would they have treble coming through as a two way design? The tweeters are fine by the way. Either way they still sound great but I'd prefer they sounded the same.
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ColinR
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Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Tue Oct 04, 2005 6:50 pm    Post subject: Reply with quote

The "bright one" has a bad joint on C2 eliminating L2 from the circuit.

Do I win a prize if I'm right? Smile
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tolstoy
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PostPosted: Tue Oct 04, 2005 10:43 pm    Post subject: Reply with quote

Watch this space...
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tolstoy
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Joined: 31 Aug 2005
Posts: 16
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PostPosted: Wed Oct 05, 2005 11:50 am    Post subject: Reply with quote

What can I say… truly you are a man of great wisdom, your diagnosis was spot on (ever thought of becoming a doctor? Maybe you are one). Now at the risk of testing your patience if I thought that this same speaker was still a shade off in the depth department what would I be looking for? It’s subtle but I sense the other drive still appears to reach further down, though perhaps I should listen awhile longer before making this judgement. The crossovers are SP1052 by the way not as subject title.
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ColinR
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Joined: 31 Jul 2004
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Location: Staffordshire

PostPosted: Wed Oct 05, 2005 4:10 pm    Post subject: Reply with quote

Quote:
ever thought of becoming a doctor?


I've already got a little something which is useful for intimidating Banks, Sales, Marketing, etc., which just happens to be a little more advanced than either MD or PhD Cool .

Quote:
his same speaker was still a shade off in the depth department


Although there are at least two different SP1052 crossover topographies, I think (from memory ) you've messed up C3.
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