Are you still with me Al? I was planning on sending my amp in for a tune-up and I asked CODA about some of your original querries and this was their response:
" 1k was a misprint in some manuals that keeps popping up like a zombie. I even found it on our website after we restored it from a hack.
The input stage of the CSiB preamp can easily be over driven by a DAC with that output level. Best option would be lower the DAC output and use the volume control in the CSiB to increase SPL.
FYI, the standard for balanced input before 'high end audio' got involved was 600 Ohms. The low impedance improved noise reduction. Any properly designed SS amp should not have a problem but that does not mean that some high end amps won't crap out. Again 10k not 1k"
So a misprint, but it seems they still suggest to turn the volume down on the DAC and use the volume control on the amp. Didn't say with balanced or RCA though?
" 1k was a misprint in some manuals that keeps popping up like a zombie. I even found it on our website after we restored it from a hack.
The input stage of the CSiB preamp can easily be over driven by a DAC with that output level. Best option would be lower the DAC output and use the volume control in the CSiB to increase SPL.
FYI, the standard for balanced input before 'high end audio' got involved was 600 Ohms. The low impedance improved noise reduction. Any properly designed SS amp should not have a problem but that does not mean that some high end amps won't crap out. Again 10k not 1k"
So a misprint, but it seems they still suggest to turn the volume down on the DAC and use the volume control on the amp. Didn't say with balanced or RCA though?