Temperature Coefficient

[jstack]

I usually just search to find all my answers, but I couldn't find this for the life of me. Is the Temperature Coefficient 'SL' as good as C0G/NP0? I couldn't find any info on the 'SL' Temperature Coefficient anywhere.
I'm just wondering if the 'SL' is as useable for audio as the C0G/NP0 caps are. My main reason for asking is I just bought a bag of them and I didnt notice I got SL variety over the NP0 that I normally get.

[Paul Perry (Frostwave)]

I don't know either, but for stompboxes, temperature coefficient of caps is a non-issue.
True, some caps which have high variation with temp are crap; but that is for other reasons (eg variation with voltage).

[jstack]

I didn't figure it mattered much.
I was just wondering if maybe anyone knew where I could find more info, or actually knew if these are interchangeable with the G0G/NP0 Temperature Coefficients.
Just wanna make sure these will sound ok, after hearing all the horror stories about the Y5V types... I don't wanna use them all and have to desolder all 150 of them 

[Paul Perry (Frostwave)]

Oh, if you are putting in 150!! that is another matter, I believe (there is plenty of stuff on the net if you search for   ceramic capacitor SL ) it appears to me that it is the same as K type ceramic caps, which are really for small size bypass & definitely not the best audio caps.

www.kemet.com/.../$file/2007%20CARTS%20-%20Reduced%20Microphonics%20and%20Sound%20Emissions.pdf
is an interesting article, here they apply signals to caps and use a sensitive microphone to see whether they can hear the cap vibrating ! (which it will do, if it has piezoelectric characteristics). The conclusion there is, use c0g. now this report is by a cap manufacturer - but they do make ALL kinds of caps!

[db]

It might make a difference in critical timing circuits e.g. PLL VCOs.