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Class D Switching Power Amplifiers and Power D/A conversion

mods poppulse t150
mods poppulse t150
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Old 8th February 2011, 12:10 PM   #1
SICLI is offline SICLI
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Join Date: Feb 2010
Default mods poppulse t150


My first experience with mods on my first poppulse (t77) was very good.
I would try again with this t150 mk2:

- Replacing coupling caps with mkp
- Repacing Pot for SMT resistor step attenuator

But I don't know where are coupling caps on this new t150...

There are 3 caps near the audio output. 2 Elna cerafine 47uf between relay and coil, and 1 more (100uf) on the left side of the ta2022.

I think this 2 red caps 47uf are the coupling caps.
If someone can help me...

Can I replace these 47uf with 3,3uf mkp? I don't know the input resistance and I don't want to cut my bass...

What do you think about SMT pot? Actually the pot is ALPS blue one (2x 10kohm). Is it really better to replace this with a SMT attenuator 20kohm?


Many thanks...

Last edited by SICLI; 8th February 2011 at 12:22 PM.
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Old 11th July 2013, 09:21 AM   #2
grotius is offline grotius
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Join Date: Jul 2013
Hi there,

I own a POPPULSE T150 MKII and was wondering how the upgrade worked out. I am interested in making my POPPULSE T150 sound better and looking for some guidance.
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Old 20th July 2013, 08:35 PM   #3
pguerin is offline pguerin  France
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Join Date: Nov 2010
Location: Savoie - France
Hi Grotius,

Bypassing the volume pot is easy and has made a subtile improvement on my T150 mkII.
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