Maximum Input Voltage

I’m looking for the a technical specification on Adcom’s GFP-750.

Anyone know what the “maximum input level” in Volts RMS for the balanced inputs?

I recently purchased a DAC with only variable balanced output. I don’t want to overdrive the preamp’s input. Any help appreciated.

This is the only related specs I could get from the Adcom documentation. I contacted Adcom and they do not have any additional data.

Input Sensitivity (@ Rated Output) Balanced 183mV

Input Impedance Balanced 94k Ohms

mjjw12-14-2022 12:30am

dpop Details Discussions Posts This discussion Message User 293 posts 12-14-2022 at 12:48am Copy Comment URL Report Comment Edit Delete Anyone know what the “maximum input level” in Volts RMS for the balanced inputs? It looks like the Adcom’s GFP-750 manual does not state this information, so I’m not sure how anyone would know it. Here’s a good rule of thumb; most balanced analog pro-gear has an input clip level of +24 dBu. You definitely don’t want to exceed that, and it’s doubtful your equipment could even provide such a high output. I still stand by the old standard of supplying a +4 dBu (or 1.23 volts) output signal (@ 1 KHz) to an analog balanced input. This then allows +20 dB of headroom on the balanced analog input. The pre-amp circuitry should then provide the gain needed to feed the power amplifier.