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Audio GD SA-31 head amp/ preamp . A powerfull Head Amp with Diamond Difference design . - Page 9

post #121 of 252
10/28/12 at 9:02pm
Before my stepfather solders, I just wanna touch base with you guys...



A crude drawing... but this would be the correct way, right?

The resistors would 'hover' over the existing resistors right? The metal legs would be directly soldered where the existing resistor's metal legs are, correct?
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post #122 of 252
10/29/12 at 2:51am

Exactly ;)

 

If you have a multimeter, try to match the 2 resistors (or you may ask your dealer, if he's nice and patient you can get a matched pair).

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post #123 of 252
10/29/12 at 3:48am
Ah damn it... now I need to get one of those.

Okay, if I get one...

I some vids, but I wanna make sure...

Certain multimeter's knob for ohm has settings at:

200M, 2M, 200K, 20K, 2K, 200

To test my 2.2Kohm at 1/4watt resistors, what setting should the multimeter be at?





I rather not bother with ANY of this, but I have no idea where to go that would do all this. I doubt the guys at Radio Shack would know what they are doing, or even have a multimeter to test this out...

My remote just stopped working, WHILE I was using it. I hope to god it's just the battery... swapped out the board on the remote (same battery), and it's still not working. Time to go to CVS...

edit: My HE-4 came in! I literally went to CVS to get new batteries as I was coming back the delivery people came behind me. I could have missed them! Wow, they are considerably light vs the HE-400...

FYI, I need the volume at around 60 vs the 40-50 mark on the DT990/600.
Edited by Mad Lust Envy - 10/29/12 at 5:59am
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post #124 of 252
10/29/12 at 6:19am

There should be an extra battery in the box.

 

I would not get anyone's input on what you're doing other than Kingwa directly.

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post #125 of 252
10/29/12 at 6:21am
There wasn't an extra battery, though there was an extra board. Swapped the battery and it works now.

The input I'm getting is general, and not SA-31 specific. As in, testing the resistors with the multimeter. Already know what I have to do to the SA-31 itself. Just wanna make sure I get GOOD resistors. I've seen on youtube how new resistors can have wildly varying levels..., so it's a good idea to get a matched pair...
Edited by Mad Lust Envy - 10/29/12 at 6:24am
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post #126 of 252
10/29/12 at 7:00am

I just don't want you to blow-up your new (expensive) toy!

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post #127 of 252
10/29/12 at 7:03am
Trust me. I don't either, nor would I ever try that. I won't be the one touching this thing, as I do not have a delicate touch. My step father will solder the resistors, but before then, I wanna make sure the resistors are matched.

Doesn't look like I'm keeping the HE-4 anyways. Not enough bass for my needs.
Edited by Mad Lust Envy - 10/29/12 at 7:21am
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post #128 of 252
10/31/12 at 6:04am
So my stepfather soldered the 2.2K resistors in. Definitely gave it the push it needed for everything except the 3DS which is at a moderate volume with the DT990/600ohm (it was low before). At this point, I'll just call the 3DS a pathetically weak source and leave the SA-31 as is, as the Vita got plenty loud, as did my Sansa Fuze. Either I'll deal with the moderate volume, or use an easier to drive headphone later (Probably the Pro 900, if the HD650 doesn't suit my needs).

I'm more than happy with the SA-31 now. I shjouldn't have problems driving anything, with the exception of the 3DS paired with hard to drive cans which was illogical to begin with.

I don't wanna risk putting too much gain on the SA-31 just because one source wasn't a perfect match. Now, I have plenty of headroom when using my main setup.
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post #129 of 252
10/31/12 at 10:55am
Quote:
Originally Posted by Mad Lust Envy View Post

So my stepfather soldered the 2.2K resistors in. Definitely gave it the push it needed for everything except the 3DS which is at a moderate volume with the DT990/600ohm (it was low before). At this point, I'll just call the 3DS a pathetically weak source and leave the SA-31 as is, as the Vita got plenty loud, as did my Sansa Fuze. Either I'll deal with the moderate volume, or use an easier to drive headphone later (Probably the Pro 900, if the HD650 doesn't suit my needs).
I'm more than happy with the SA-31 now. I shjouldn't have problems driving anything, with the exception of the 3DS paired with hard to drive cans which was illogical to begin with.
I don't wanna risk putting too much gain on the SA-31 just because one source wasn't a perfect match. Now, I have plenty of headroom when using my main setup.

And it sounds good? rolleyes.gif

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post #130 of 252
10/31/12 at 7:06pm
Sounds exactly like before. No perceived difference in noise, etc. As amazing in clarity, dynamics, and punch as before, just with a lot more volume to play with.

I just really hate the 3DS for being so pathetic in source volume. Running ampless, even the KSC35 is barely at moderate volumes with the 3DS maxed out. That's ridiculous. I'd probably need the SA-31 at like 30db to get the DT990/600 'LOUD' off it. Screw that. I'll preserve my sanity and SA-31. The 3DS is KSC35 only, I guess, unless I get the Pro 900 again. I may do that, depending on if I like the HD650 or not.


Edited by Mad Lust Envy - 11/1/12 at 10:35am
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post #131 of 252
11/1/12 at 11:42am

Hello, does the SA-31 have 1 or 2 sets of RCA outputs ?  Thanks

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post #132 of 252
11/1/12 at 11:44am
Two RCA outputs. Five RCA inputs.
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post #133 of 252
11/1/12 at 11:45am
Thread Starter 
Quote:
Originally Posted by lugnut View Post

Hello, does the SA-31 have 1 or 2 sets of RCA outputs ?  Thanks

 

Two RCA output , One use neutrik connector , the other  less expensive gold plated RCA (but don't mind ) .

 

Edit : Mad Lust Envy was faster tongue.gif


Edited by HaVoC-28 - 11/1/12 at 11:47am
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post #134 of 252
11/1/12 at 11:45am

Great !  Thanks

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post #135 of 252
11/6/12 at 12:02pm
Huh, I got my new HD650 in. So far I have used the SA-31 with:

DT990 32, 250, Pro, 600 ohms
KSC35
HE-4

The HD650 is the one where I notice the warmth jumpers making a noticeable difference. It warmed up the sound a bit too much with the HD650. I didn't notice a major change with the 990s. So since I plan on keeping those two cans as my mains, the jumpers have to stay off. If it was just the 990s, I'd keep them on.
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