SSlmixed.com Forum
Tech discussion => 4K,6K,8K Series => Topic started by: anguswoodhead on November 06, 2020, 10:32:46 AM
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Greetings
New member from AU - first post
Great group - thanks fore the add.
I have 8 x E 6k Ch Strips
I want to fully recap them and upgrade the IC's also
what are the absolute best sounding ones in your opinion?
Thanks in advance.
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Hi,
Great to hear from you! On the ICs I would be very careful, we went to a lot of work to make the circuits work with 5534s (which are pigs of devices in many ways, they love bursting into oscillation) so any other ICs might well behave...not as you'd expect. Unless you do a lot of work around them. And anyway any audio problems with the 5534s are swamped by the switching FETs and the VCAs!
That said, it's certainly worth checking if any of the 5534s have gone noisy, and replace them if they have. It's usually pretty obvious if they have.
But the capacitors can definitely be improved, many of the coupling caps are really too small in value compared to what's available now in the same size packages, hopefully others here can pass on what they've found works well.
Best upgrade for the sound if these have '11 and '12 cards in is to replace them with '293 and '294 cards, these make the FET switches sound much better. But of course that can be quite an expensive mod unless you're lucky!
And of course fit a '291 input card. But I would say that ;) Actually that's more down to what you like the sound of.
Keep us posted! And look forward to seeing what others come up with.
Cheers,
Andy
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Thanks so much Andy
I just got this msg from the mate who is doing the work
“ Hi Angus, I haven't ordered the caps yet. I have a BOM ready to go from 4K modules from someone but would like to visually check against an actual 6K module to see if the values & quantities are the same. Do you know if they are the same input modules apart from the A, B, C master buss routing ? I have schematics for the 4K but not the 6K. I think it would be prudent to wait until I'm back to check these before I do the order, unless you can get a BOM from someone for your modules ? Also, maybe ask that bloke what caps are the decoupling caps values & quantities if you could ? Cheers Matt”
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Hi,
All the cards are identical between the 4k and the 6k (except as said the little bus routing card) BUT there are several different versions of the cards! So perhaps that's sort of the wrong question, rather than "is your channel different because it's a 6k", it needs to be more "which cards have your particular channels got in them".
Here's a good starting point for a checklist of all the various cards which might be in there which Matt and I put together a while back. http://forum.sslmixed.com/index.php?topic=1250.0
Cheers,
Andy