PCI card power amplifier

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#29
panomaniac said:
Most average sound cards DO have noise problems. Maybe not on paper, but in real life. I wonder how much it would cost to do a low noise class-d amp board?
Click to expand...


One great solution is bridged configuration (balanced, differential)... in this case noise is cancelled, because most noise in PC is common mode noise...
Another solution is multilayer PCB and shilding with copper layers in PCB.

This two are basic construction solutions...

Best regards,

Boggy
 
#31
i am very interested in putting an amp inside my computer, as i am making a HTPC.

my first idea was to use a micro-atx board, which should leave room for an amp like the TA-10 (amp is of known quality, plenty of modding ability around... and shield it somehow.)

upon searching, i found the URL=http://www.si5.com/products.php?pID=4038]pci amp[/URL] which seems like it would be the obvious choice, but im skeptical that the TA1101B is as good as the Tripath 2024 that i have done so much reading about. if the pci amp is just as good, i will go that route, but if it isn't, im ready to mod (it will keep me from modding my car again).
 
#32
Hi,
Marchand Electronics, in Rochester, NY, makes an amplifier like that.
See www.marchandelec.com/pm48.html
The amp plugs into the desktop PC and uses 12V power from the same 4-pin connector as the diskdrives use.
Amplifier chip is the Philips TDA8563Q dual power amp. This device is normally used in cars.
The amplifier is available as kit or fully assembled.
Sorry for the shameless plug. 🙂
Phil Marchand
Marchand Electronics Inc.
 
#33
PC are no more used for simple data processing, you find them every where. one of them would be a PC with class room control system connected with Projector / LCD monitor, Smart Board & customized software for educational instituations with Display & smart board control. The advantage of having internal Audio Amplifier on PCI card would be an added advantage, so that it will be possible to give one box solution for small class rooms & meeting rooms.
 
#34
droptop said:
i am very interested in putting an amp inside my computer, as i am making a HTPC.

my first idea was to use a micro-atx board, which should leave room for an amp like the TA-10 (amp is of known quality, plenty of modding ability around... and shield it somehow.)

upon searching, i found the URL=http://www.si5.com/products.php?pID=4038]pci amp[/URL] which seems like it would be the obvious choice, but im skeptical that the TA1101B is as good as the Tripath 2024 that i have done so much reading about. if the pci amp is just as good, i will go that route, but if it isn't, im ready to mod (it will keep me from modding my car again).
Click to expand...

Non-economically feasable. They make 5.1 class D amps w/speakers and spdif inputs under 80$. Only if you are planning a large system would you DIY.

With a micro ATX you could integrate your $30 chinese tripath ,an E-waste PS and a blank adaptor w/ speaker jacks for a self-contained solution.

OS
 
#36
kind of already exist but for a DIY effort I would be concerned not about noise entering the class D card as this is easy to diagnose and observe and fix given enough time but the class D amp causing the computer to be unstable. Shielded inductors and spread spectrum modulation would be mandatory and even then I would want to put the whole thing in a box. Wouldn't a drive bay amplifier be a better idea as it's a much larger space and further away from sensitive areas and offers better scope for shielding (IE build into an old CDROM case).
 
#37
kipman725 said:
Wouldn't a drive bay amplifier be a better idea as it's a much larger space and further away from sensitive areas and offers better scope for shielding (IE build into an old CDROM case).
Click to expand...

Yeah but then where would you get the audio input from? Cheap USB DAC? Kinda goes against the whole "audiophile" idea. Of course, you can always pull a cable outside the case and go to the actual soundcard. But this is suboptimal in a number of ways (been there, done that).
 
#38
I have been searching for this quite a bit as well. I can't believe more manufacturers have no tapped this market. 1) less boxes taking up less room is better 2) simplicity is nearly always favored. So I am befuddled to see all these stand alone DACs popping up everywhere, as well as the tiny amps. Put both on a card and slap them in a computer. I figure it's got to be cheaper to build a computer card than a stand alone unit.

Here are some units I've found:

Sonic Impact Tio (discontinued)
MSI Model MS-4140 (discontinued)
Scythe Kama Bay SDA-1000 (discontinued)
Scythe Kama Bay SDA-1100 (discontinued)
Scythe SDAR-2000
Scythe SDAR-2100
ERC PC AUDIO AMPLIFIER PCI CARD (discontinued?)
Audiotrak Cardamp MK-II (discontinued?)
Marchand PM148
Ego Systems' PCI Audio Amplifier (discontinued?)
PREL PA2014 Personal Amplifier

Supposedly Scythe was going to release a SDAS-1000, but that seems overdue considering the announcement is 1 year old.

Then there's always Ebay:
HI-FI Digital PC Computer PCI-E Audio Amp Amplifiler Board 2x25W Expansion Card | eBay

MUSE PC21 T-AMP AMPLIFIER 2*25W TA2021 For Desktop PC | eBay
 
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#39
MSI managed to build an internal amplifier that shared a power supply and lacked a dedicated housing. Apparently interference wasn't an issue. Reviews seemed positive despite some reliability issues. But that's going to happen with a beta product. Unfortunately these computer component manufacturers jump in for the beta audio endeavors... but fail to follow up. MSI abandoned this product, the mobo with built in vacuum tube was abandoned, and Cooler Master abandoned the 5.25" add on tube buffer (Musketeer 3).

Amp Up: Give The MSI Five Channel Card A Shot : The HTPC / Windows 7 Chronicles: You Asked, We Answer!
 
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