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γ1 (gamma 1) DAC thread - Page 8

post #106 of 159
4/13/09 at 5:36am
^^ ohh yes, ofcourse I did mean the spdif DAC could decode the 24/96 .

Thanks for making it clear.

One more thing, my denon 1001 are very sensitive cans and when I used hotaudio's DAC+AMP with them there was lots of hiss.
Would the gamma lite alone be able to drive it well ?
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post #107 of 159
4/13/09 at 5:55am
Quote:
Originally Posted by gurubhai View Post
One more thing, my denon 1001 are very sensitive cans and when I used hotaudio's DAC+AMP with them there was lots of hiss.
Would the gamma lite alone be able to drive it well ?
Read post #100 and #101 above...

The Denon you have has an impedance of 32 ohms. You should connect the γ1 to a headphone amp to drive your headphones. Whether you hear hiss or not is related to the gain of the headphone amp and isn't an issue with the γ1.
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post #108 of 159
4/13/09 at 6:04am
[QUOTE=MisterX;The Gamma 1 DAC is meant to drive a high impedance loads.
You could install larger C24D and C25D capacitors if you wish to drive low Z headphones directly but then you are dependent on either the media player or the Windows mixer to control the volume......[/QUOTE]

does this mean that my 32 ohm can would be a mismatch for this DAC.

Also, can MisterX customise it to cater to low impedance cans.

Sorry, but I am a noob wrt DAC/AMPs
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post #109 of 159
4/13/09 at 6:17am
gurubhai, γ1 is not a DAC+amp. It's a DAC only, and not intended to drive headphones directly. It just so happens that the WM8501 DAC chip used in the γ1 has a fairly stout output stage, and the default 22uF output coupling capacitor is big enough to drive 300+ ohm headphones satisfactorily, but a 32 ohms headphone will perform poorly (-3dB rolloff at 234Hz). You need to increase the output coupling capacitors to at least 10x the default size to achieve acceptable bass response, but the PCB was not designed for, nor is there room for such large capacitors in the standard casing.

Use a proper headphone amp along with the γ1 and be happy. A Mini³ configured for gain of 2 will be a good match for your headphones.
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post #110 of 159
4/13/09 at 6:41am
^^ thanks
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post #111 of 159
4/13/09 at 5:55pm
And do you guys do Mini³+γ1 in one box with spdif in and with an extra loop out?
that would be a real dope.
all we would need for this is the γ1 with two of its already existing output, one for the Mini³ inside, and one for line out. we would use a switch, to chose HP or Line out.

I think this combo would blast away everybody
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post #112 of 159
4/13/09 at 7:52pm
Quote:
Originally Posted by selkin View Post
And do you guys do Mini³+γ1 in one box with spdif in and with an extra loop out?
that would be a real dope.
all we would need for this is the γ1 with two of its already existing output, one for the Mini³ inside, and one for line out. we would use a switch, to chose HP or Line out.

I think this combo would blast away everybody
Its been mentioned in here before. I even saw one for sell recently, but AMB only sells kits, you would need to to build this (or get someone else to). Its a little more advanced to seperate the ground and provide for the separate power supplies to each. You should search the thread for where it was explained.
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post #113 of 159
4/13/09 at 9:22pm
Yes I've seen that beauty FS. But it's only the lite version, and it has no line in, neither has line out, unfortunetaly.
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post #114 of 159
4/14/09 at 1:37am
I would rather have them seperate. The y1 full and rockhopper mini^3 make a nice looking stack and is transportable (meaning it can be used with the laptop with no wall adapters needed if mini^3 is charged). You can probably build that too I suppose in one box, but then they can't be seperated for something like a mini^3 and iPod small stack.
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post #115 of 159
4/14/09 at 1:50am
Quote:
Originally Posted by selkin View Post
And do you guys do Mini³+γ1 in one box with spdif in and with an extra loop out?
that would be a real dope.
all we would need for this is the γ1 with two of its already existing output, one for the Mini³ inside, and one for line out. we would use a switch, to chose HP or Line out.

I think this combo would blast away everybody
http://www.head-fi.org/forums/f42/fs...-combo-419058/
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post #116 of 159
4/14/09 at 3:03pm
Why not just get them as separate units? That way is more flexible and takes up a very tiny footprint on your desk space. On top of that, if you choose to upgrade your desktop amp, the mini3 is still available to you as a portable.
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post #117 of 159
4/14/09 at 7:26pm
yeah. but I could tell you the opposite reasons: why should I have two devices wired together when I can have just one? You see, if the γ1 would have an internal connection with the Mini³, and an other line out, I could use the γ1 with a bigger amp if I want to.
many people do this with different DAC/AMP combos.

and again, someone is not planning to use any AMPs for DAPs, just get a good DAP with a good IEMs and that's it, so the Mini³ wont end up in pockets.

anyway, this combination of Mini³ + an extended full γ1 would be more like a gd compass, just without the preamp out.
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post #118 of 159
4/14/09 at 7:27pm
Quote:
Originally Posted by jinp6301 View Post
as I said I'v seen this nice combo, but i'd need full gamma1, line in for the mini³ and an other unamped line out too.
thanks anyway
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post #119 of 159
4/14/09 at 7:39pm
So, the overall opinion about Gamma 1 is very good, but have anyone compared the Gamma 1 DAC with other DACs in the $300 - $400 range? How about Zhaolu, Yulong?
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post #120 of 159
4/14/09 at 9:35pm
If you want a combo of γ1 full config + Mini³ and not lose any of the flexibility of the individual units, you could always velcro the two together.
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