Audio out from PC direct to Power Amp


New member
Username: Hrdhrishikesh

Post Number: 1
Registered: Jul-10
Hey guys,

Need your help on connecting my PC directly to a power amp I've ordered (Emotiva UPA-2). This amp has 125 Wx2 @8Ohms and has a gain of 32 dB (input sensitivity voltage is not mentioned). I figure this 32 dB means that the amp can boost the input by about 42 times. I don't want to buy a preamp if I can avoid it. Can I directly connect the power amp to audio out of the motherboard. What voltages do motherboards generally output the audio with? I know that soundcards put out about 1-2 V. I'm thinking of buying the Intel DG-45 ID but online documents don't have this figure. Thanks for youe help.

Gold Member
Username: Magfan


Post Number: 1310
Registered: Oct-07
If the sound card ONLY puts out a fixed voltage of 1 to 2 volts, and you want to control the volume, you can build a simple attenuator.

otherwise, the amp will play however loud the output of the sound card will drive it....which at anything over 1 volt input will be pretty darn loud.

New member
Username: Javen

Post Number: 5
Registered: Jul-10
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