QA470 Low Noise Mic Pre-amp [Retired] noshowbutton this will be a Tri-Mag

this will be a Tri-Mag L6R18-120 or similar

The QA402 can operate standalone

For customers outside the US

fixed gain (10 dB ± 0

tightly-spec'd MEMS mics

QA470 Low Noise Mic Pre-amp [Retired] noshowbutton this will be a Tri-MagNOTE: The QA470 has been replaced by the QA471, which is the same product with 10 dB of mic gain instead of 20 dB. There were many cases where mics with high acoustic overload points (AOPs) were requiring the attenuator to be engaged on the QA401 at 125 to 130 dBSPL. The lower gain will help with that. Since the QA401 input noise floor is 115 dBV (20 kHz, no weighting), there's still plenty of margin to measure the at the noise floor even with just 10