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Ganqi Amp Module for Earphones (GAME card)

post #1 of 35
3/3/10 at 1:21pm
Thread Starter 
The original amplifier module of HM-801 player, Ganqi Amplifier Module Standard (ST card), was designed for both earphones and full size headphones. ST can provide 70mw at 32 Ohm, and 45mw at 320 Ohm. Gain was set as 1.6. It is a powerful amplifier and can drive most headphone cans and high impedence earphones. However, some customers complain that ST is too powerful and too much gain when driving high efficiency in-ear (more than 120db).

Now we are releasing Ganqi Amp Module for Earphones (GAME card). It is a card using the hi-end OPA627 opamp plus 634 buffer. GAME card was designed for earphones so that the gain is only 0.9. We believe such a low gain will help high efficiency IEM users minimize imbalance in low volume (Analoge volume control always have such problem at low volume), and will make customers more comfortable when adjusting volume (volume will not jump to much when move the volume control). We will provide more data about GAME card soon.

GAME card will be retail as 170usd. Because GAME's cost is much higher than ST, and does not have enough output when driving high impedence full size headphones, we will not sale GAME with HM-801.

GAME card will be available at HEAD-Direct website in the next two weeks.
head-direct: The Web Store of HiFiMAN
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post #2 of 35
3/3/10 at 7:25pm
Which op-amp and buffer is the ST card using?
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post #3 of 35
3/4/10 at 6:00pm
Thread Starter 
OP275+transistor circuit buffer
head-direct: The Web Store of HiFiMAN
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post #4 of 35
3/4/10 at 6:25pm
Interesting.. so its all IC based now? Are the new opamps on sockets or are they soldered on?
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post #5 of 35
3/4/10 at 6:37pm
So this is the high end amp module?
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post #6 of 35
3/4/10 at 10:37pm
Thread Starter 
GAME is the hi-end amp module for IEMs.
head-direct: The Web Store of HiFiMAN
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post #7 of 35
3/4/10 at 11:00pm
Are there any plans for high end card for high gain ...

Thx
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post #8 of 35
3/4/10 at 11:26pm
Uhm... don't get me wrong, I think OPA627+BUF634 is a nice combo, but the discrete output stage on the standard model is likely "more high end" for full sized headphones.
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post #9 of 35
3/5/10 at 12:06am
Thats what I was thinking too.. that discrete was always better then the IC version
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post #10 of 35
3/5/10 at 12:40am
Thread Starter 
Quote:
Originally Posted by FallenAngel View Post
the discrete output stage on the standard model is likely "more high end" for full sized headphones.
Bottleneck: portable.
head-direct: The Web Store of HiFiMAN
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post #11 of 35
3/5/10 at 5:42am
I have some IEMs as well as Yuin OK1. Can GAME card drive OK1?
Due to lower gain, will HM-801 get a longer battery life with GAME card?

Thanks.
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post #12 of 35
3/5/10 at 10:53am
Ye battery life is good question?
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post #13 of 35
3/5/10 at 12:14pm
Thread Starter 
According current test result, there shouldn't be a big difference.
head-direct: The Web Store of HiFiMAN
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post #14 of 35
3/6/10 at 1:51am
good,wait for GAME Card
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post #15 of 35
3/7/10 at 6:31pm
Put me down for one please Has the pre-order begun yet?
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