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Old 25th September 2013, 01:44 PM   #1
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Default USB AD/DA card for amp measurements?

Any proposals for USB connected soundcard to be used in amplifier distortion measuring and in loudspeaker measuring?
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Old 25th September 2013, 02:05 PM   #2
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I have used an E-MU 0404 USB for this purpose for some time with results that compare well with expensive Audio-Precision instruments. The problem is that this product is obsolete and Creative are no longer supporting it for things like driver updates. M-Audio are also poor in this respect.
You need a high quality sound card with (preferably) balanced inputs capable of full-duplex operation at a sample rate of 96kHz. (You need this sample rate or higher to get meaningful THD measurements across the audio band). You might find that the E-MU 0204 USB will be ok, or perhaps something from Echo Audio.
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Old 26th September 2013, 05:02 AM   #3
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I have used EMU 0404 USB but it does not work with anything newer than WinXP. This is reason why I am asking proposals for low distortion but somehow reasonable priced external soundcard.
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Old 26th September 2013, 05:28 AM   #4
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QA400 Audio Analyzer
$200, recent product and works without needing extra software or Windows components. Simple to use and almost idiotproof. A couple of 30 Mhz scope probes or BNC/RCA, Bananas, clips or whatever leads you want, might be a nice addition.
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