^ @harkpabst It is common to put a serial resistor (say 100 Ohm) in line with the output to avoid trouble with marginally stable input circuits. WiiM has not done so.
WiiM Ultra direct to Purifi amp (Audiophonics LPA-S450ET): audible hiss – anyone else experienced this?
- Thread starter Corchea
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- noise wiim ultra
What are the input impedances for your NCore and the NAD's aux input?
Also what are the output impedances for the NAD's preamp out and the Ultra?
Are you using the same cable between the Ultra and Purify amp as you're using between the NAD and Purify amp?
Also what are the output impedances for the NAD's preamp out and the Ultra?
Are you using the same cable between the Ultra and Purify amp as you're using between the NAD and Purify amp?
slartibartfast
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Which amplifiers are unstable with a low output impedance source?
I do not know. What I do know from this thread is that the input boards in these Audiophonics amps have had issues with their integrated circuits and that the op has had no hiss problems when using his NAD to feed the power amp.
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