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Old 9th March 2012, 03:48 PM   #1
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Default DEQ2496 Capacitors upgrade question

Hello:

I would like to make a capacitors upgrade on the DSP board (AKM chips, etc). I have several Sanyo OSCON SEPC 470uf 16V in my drawer. Do they have too much capacitance? The actual DSP capacitors are 10uf.
Would I have some problem with the experiment?

I'm new in the DIY, so sorry if the question it's very basic.

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Old 25th March 2012, 07:58 PM   #2
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Hi Tower,
I think it`s best to stick with the original values. Yours might work, or not. Biggest problem is when you get problems that are random. So later on you start asking yourself all kinds of questions what the problem might be. So, better to stick with the 10uF!
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Old 25th March 2012, 08:11 PM   #3
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I went to 47uF Panasonic FM series in my DCX2496. Seems to work just fine. I'll be trying the same in the DEQ today or tomorrow.
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Old 28th March 2012, 03:18 AM   #4
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Still haven't gotten time to replace the caps, maybe this weekend.
I can tell you that a transformer output modification to the DEQ lowers harmonic distortion by 15dB or better and IMD by 20dB or more. Not too shabby!
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Old 28th March 2012, 04:36 AM   #5
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Quote:
Originally Posted by Pano View Post
I went to 47uF Panasonic FM series in my DCX2496. Seems to work just fine. I'll be trying the same in the DEQ today or tomorrow.
Which ones?? All the electrolitics on the DSP board?? or just osme in particular?? Any improvements to be had..?

I already have Oettle Vregs, and clock mod, etc.. would it be worth upgrading to Panasonic FM series??

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Old 28th March 2012, 12:07 PM   #6
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Well... let me see if I remember which ones.

I did all the power caps from the regulator to the DAC and ADC chips, C2, C3, C4, C5 C6, C8, C10 - C17, C55, C26, C27. I don't think I did the VRef pins of the DACs. I'll double check that.
It was certainly cleaner sounding and had much more subjective drive dynamics and "oomp". Not surprising, as I use a transformer output directly from the DAC so the bigger value, lower ESR caps seemed to help a drive the output better.

Tests I've seen on the OSCON caps indicate they may be even better than the Panasonic FM. The FM are easy and cheap for me to get at Digikey. There are a number of folks doing cap upgrades to the DCX as the stock caps are pretty cheap community items. The DEQ is so similar that the same upgrades apply.
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Old 29th March 2012, 12:14 AM   #7
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Hmm.. Thanks Pano,

I'll check it out.. Just need to find an aussie stockist of Panasonic FM caps??

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Old 29th March 2012, 03:19 AM   #8
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Or the OSCON, they seem to be really good in digital noisy circuits.

Unfortunately, I looked in my parts bin today and have only 1 of the correct value caps left. Will have to order more of the FM series in 47uF. Nice that they are the same size as the stock caps, they fit right in. Will report and try to provide before & after measurements once the new caps are in place.
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Old 29th March 2012, 04:51 AM   #9
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Quote:
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Or the OSCON, they seem to be really good in digital noisy circuits.
Is OSCON the brand of capacitor?? What about the type, model number, etc.. Maybe i iwll see if i can get these ones instead..

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Old 29th March 2012, 11:53 PM   #10
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See the first post. I'd stick with 47uF, no bigger.
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