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Gear / Technical Help => Microphones & Setup => Topic started by: RyanJ on September 10, 2025, 02:22:20 PM

Title: Quick Question for 4.7k Mod - Plug In Power Voltage?
Post by: RyanJ on September 10, 2025, 02:22:20 PM

Using the FR-AV2 and tried to run Plug In Power with the AT853s that have a 4.7k mod. The 32 bit float has some nasty hiss in the recording. Did I overcook the mics? I set the plug in power to 5V. But there was an option for 2.5V as well. Nothing else. Could that have been why I have such bad hiss/noise floor on the recording? I did crank the gain up. But didn't think that would affect the tape so much.

Title: Re: Quick Question for 4.7k Mod - Plug In Power Voltage?
Post by: nulldogmas on September 10, 2025, 02:53:30 PM

Quote from: RyanJ on September 10, 2025, 02:22:20 PM

Using the FR-AV2 and tried to run Plug In Power with the AT853s that have a 4.7k mod. The 32 bit float has some nasty hiss in the recording. Did I overcook the mics? I set the plug in power to 5V. But there was an option for 2.5V as well. Nothing else. Could that have been why I have such bad hiss/noise floor on the recording? I did crank the gain up. But didn't think that would affect the tape so much.

I run 4.7k-modded AT853s with a 12v battery box all the time with no problem. Chris at Sound Professionals also confirmed they can handle 12v.

What was your recording peaking at before you cranked the gain up?