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Old 27th September 2020, 09:03 AM   #1
Maakbow is offline Maakbow  New Zealand
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Question Lm3875 kit - snubber or not?

I'm a noob. I've googled the snubber but don't fully understand it.

So simply should the snubber elements be added. I think there's spaces in the kit board for these if I read correctly. Will it sound better? Everything i googled says that's why it was thought of.

I'm pretty confident I can build this kit but I'm not an electronic engineer and completely unable to know wHat the right answer is or what missing component values are. I just want to be told.
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Old 28th September 2020, 10:37 AM   #2
Maakbow is offline Maakbow  New Zealand
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Maybe answering my own question but after getting about 50 pages (of 228 pages ��) into the GC kit thread am I right in Peter does not use snubber anymore for this kit? There is a lot of info in these thread but so much reading things i only vaguely or dont understand.
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Old 28th September 2020, 11:36 AM   #3
nigelwright7557 is offline nigelwright7557  United Kingdom
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The snubber counteracts the inductance of the speaker to give a more resistive load for the amplifier.
I must admit on my own high power designs I rarely bother with snubbers and not had any problems.
Some people say it helps stability in the amplifier.
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Old 28th September 2020, 12:14 PM   #4
benb is offline benb  United States
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For this kind of question, read the data sheet and app notes from the chip manufacturer, as they are authoritative. The snubber is shown in the typical applications schematics that presumably the specs and performance curves are measured from, so I'd use it.
https://www.ti.com/product/LM1875
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Old 21st October 2020, 06:49 PM   #5
Peter Daniel is offline Peter Daniel  Canada
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Lm3875 kit - snubber or not? Send a message via AIM to Peter Daniel
I'm not using snubber, neither Gaincard had it implemented. It's not really critical here. I only once came across the speakers, or cables, that required snubber. To me, the amp sounds better without it.
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