(07-25-2023, 09:26 PM)michaelagiles Wrote: Does anyone have any info on the output drive capabilities of the ProtoDac? my Pass BI preamp has an input impedence of 25K and I was wondering if this is sufficient for the obviously "simple" O/P section of the ProtoDac?
Any info appreciated.
I am considering upgrading the pots on the B1 and wanted to get the best match for the DAC.
Thanks!
MG
It shouldn't be a problem. The output impedence should be less than the 420 ohms of the I/V resistor. I have driven my Icepower 500ASP (which has a relatively low input impedence of 8k ohms) using a 10k ohm stepped attenuator without problems.
Hardware: RPi Zero W | Allo Kali | ProtoDAC TDA1387 X8 | PGA2311 | Icepower 500ASP | Harbeth SHL5
Software: Moode 8.3.3
Source: Win 10 NAS
Software: Moode 8.3.3
Source: Win 10 NAS
