Detail 01
65 dB gain
Provides up to 65 dB of gain.

Independent shopping perspective
API’s 512v is a hand-assembled 500 Series preamp for microphone, line, and instrument signals. Its front-panel Combo-style XLR/1/4-inch input keeps connections close at hand, while rear mic access adds routing flexibility in an API lunchbox, 10-position 500V vertical rack, or API console. With 65 dB of gain, a -129 EIN noise specification, variable output control, selectable 3:1 transformer setting, phantom power, polarity switching, and a -20 dB pad, it covers a broad range of input setups.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
Provides up to 65 dB of gain.
Detail 02
The preamp is specified for low noise at -129 EIN.
Detail 03
Output level can be adjusted from the front panel.
Detail 04
A 3:1 output transformer setting can be selected.
Detail 05
A -20 dB pad is available when needed.
Detail 06
The input mode can be switched between mic and instrument/line.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
It is designed for microphone, line, and instrument signals.
Yes. Phantom power is included.
The front panel has a Combo-style XLR and 1/4-inch connector.
Yes. It includes switchable polarity and a -20 dB pad.