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Go Back   Head-Fi: Covering Headphones, Earphones and Portable Audio > Equipment Forums > Computer Audio

Computer Audio Discussion of computers as source components, sound cards, USB DACs, media servers, etc.

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Old 04-04-2008, 10:38 PM   #1 (permalink)
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Default Sound Card Mods: Film/Electrolytic/Etc. Capacitors:

Diamond Monster Sound MX300 recapped OPA4132



T-cap 3x 470uf BG N - HT Omega Claro+ AD8620



Z-cap 2x 1500uf BG NX - Prelude OPA637



No Caps

Total Recap - AD797

1x 2200uf BG NX/3x 220uf BG NX/9x 1500uf BG NX/30x 47uf BG NX - AD8620



Prodigy HiFi - 2x 4700uf BG

anyone have any info on the J7 & JP2 jumpers ?

7x nichicon 100uf @ 220uf bg nx


what are the best film caps out there that would beat the blackgates and results i got above? please specify..

phillips Q LL/panasonic fm caps were recommended

what are the best caps for power/filter/coupling/voltage regulators/dacs/codec/crystal ?

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Old 04-04-2008, 10:44 PM   #2 (permalink)
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capacitor5.jpg

>_> just kidding
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Old 04-04-2008, 10:46 PM   #3 (permalink)
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yes! so thats the siemens cap ive been reading about but had no idea what..

whatta beauty.. that will just fit snugly on the xmeridian lol

Last edited by NapalmV5; 04-04-2008 at 11:28 PM..
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Old 04-05-2008, 12:38 AM   #4 (permalink)
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Look out for something with the lowest series resistance (ESR) as possible.
A resistance is a lossy component with a noise proportional to Boltzmann's constant. You can say that any resistor consists of a voltage source and the resistance. You want to find a resistor with the lowest voltage source output, also with respect to temperature.

Well Blackgate only sells on their name. In their book, specs shouldn't be mentioned or documented since they don't need to. They have unscientific documents made by themselves which one has to ask for in order to see.

I'm especting Sanyo OS-CONS to be a good match since they are specifically sold as low-esr. You'll find them in computer hardware too, if it was a little expensive especially. Otherwise i think SMD caps have very low esr too.

For the crystal you will need to measure the crystal square waveform. The only thing that matters here is a perfect square waveform. You will need to finetune it by experimenting with different capacitor values - i'm expecting 20 pF or so. Capacitor grade and brand is of no meaning hear. Look for standard ceramic disc types.
For ICs, find the data sheet and find the recommended component values. If a specific type is noted, it has an impact, but often it does not matter what you choose. This is digital electronics, not coupling analog electronics.
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Old 04-05-2008, 06:00 AM   #5 (permalink)
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Glad you decided to post here Napalm
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Old 04-06-2008, 02:01 PM   #6 (permalink)
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Cool Massive mods...

Originally Posted by NapalmV5 View Post
this is the latest test mod im @ right now on my xmeridian


what are the best film caps out there that would beat the blackgates and results i got above? please specify..

phillips Q LL/panasonic fm caps were recommended

what are the best caps for power/filter/coupling/voltage regulators/dacs/codec/crystal ?
Can you tell me what are the opamp that you've soldered?
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Old 04-06-2008, 03:45 PM   #7 (permalink)
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Default *first post updated*

Originally Posted by Daroid View Post
Look out for something with the lowest series resistance (ESR) as possible.
A resistance is a lossy component with a noise proportional to Boltzmann's constant. You can say that any resistor consists of a voltage source and the resistance. You want to find a resistor with the lowest voltage source output, also with respect to temperature.

Well Blackgate only sells on their name. In their book, specs shouldn't be mentioned or documented since they don't need to. They have unscientific documents made by themselves which one has to ask for in order to see.

I'm especting Sanyo OS-CONS to be a good match since they are specifically sold as low-esr. You'll find them in computer hardware too, if it was a little expensive especially. Otherwise i think SMD caps have very low esr too.

For the crystal you will need to measure the crystal square waveform. The only thing that matters here is a perfect square waveform. You will need to finetune it by experimenting with different capacitor values - i'm expecting 20 pF or so. Capacitor grade and brand is of no meaning hear. Look for standard ceramic disc types.
For ICs, find the data sheet and find the recommended component values. If a specific type is noted, it has an impact, but often it does not matter what you choose. This is digital electronics, not coupling analog electronics.
thanks Daroid.. appreciated
most of the caps on the prodigy are sanyo os-cons
so, lowest ESR possible - important

Originally Posted by LordofDoom View Post
Glad you decided to post here Napalm
lol nobody wants to talk about caps anywhere else.. ill try here..

Originally Posted by finaxe View Post
Can you tell me what are the opamp that you've soldered?
ive soldered ad797 opa637 opa2107 lt1115 lt1028 lt1226

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Old 04-11-2008, 03:36 AM   #8 (permalink)
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im just having a lot of fun with this mx300

2x 2200uf bg nx/26x 47uf bg nx all paralleled



so what do the paralleled caps do?

the 10year old mx300 beats the crap outta any modern sound card without a sweat

dont have to believe me

tally: 100$ mx300 + 120$ caps + 10$ opa4132 = 230$ total tax/s&h not included

next mod for mx300: adapt 2 x AD8620 opamps

Last edited by NapalmV5; 04-11-2008 at 05:11 AM..
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Old 10-06-2008, 08:00 PM   #9 (permalink)
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opa2107 in/opa637 out - bg fk caps

Last edited by NapalmV5; 10-08-2008 at 08:38 PM..
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Old 10-07-2008, 01:07 AM   #10 (permalink)
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practically any good quality film cap will beat those BlackGate electrolytic caps for output. I saw a lot of HUGE electrolytic caps on output, why? Unless you're driving headphone directly, you need no more than 4.7uF (for 10K impedance amps), and I would personally say 1.0uF is great since computers are likely to be used with 50K impedance amps.
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