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Post by patate91 on Jul 31, 2019 19:54:30 GMT -5
I received my amplifier today.
Did a quick test.
Raspberry pi3's usb -> CD player DAC (analogue output 2Vrms, 98db noise floor).
Speaker with crossovers, so compression driver are certainly attenuate to match the woofers.
There's a small hiss at max volume which is clearly audible at listening spot. But don't think it can be heard with music (I won't try it lol). If I turn the volume down, let say from 5 o'clock to 3 1/3 o'clock hiss still present but not audible at listening space.
Minidsp has a better noise floor than my DAV (102db)
Looks promising. If there's no hiss at listening space it should be all good.
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Post by patate91 on Jul 31, 2019 21:12:18 GMT -5
Another quick test.
The cd player's "USB" input seems to be more noisy.
I tried with the "CD" input and there's an audible hiss only I place my ear at the horn's mouth.
No hiss when the cd player is off, so the A-100 is dead quiet.
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Post by patate91 on Aug 1, 2019 15:55:51 GMT -5
Here's the response from Emotiva about the volume pot: The A-100 has an all analog path...the potentiometer in the unit would be analog as well. Given the control on the unit, if you are wanting to do precise level calibration, the best way to do so would be via an SPL meter. Please let us know if you have any additional questions or we can help you further. Grayson Harper Customer Care Specialist Emotiva Audio Corporation 615 790-6754 www.emotiva.com
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Post by leonski on Aug 1, 2019 20:16:01 GMT -5
99% chance of it being a regular carbon potentiometer. Find value by measure with a DVM Replace with a stepper of same value with 1% or better resistors. Do the Math.
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