API audio 312 User Manual
Introducing the
BLO CK D I AGRAM
PREAM P STAGE
ANALOG VU
M ET ER
GAIN
PEA K LED
PAD
2520
-20
48V
48V
MIC INPUT
BLO CK D I AGRAM
PREAM P STAGE
ANALOG VU
M ET ER
PO L A RI T Y
PH A SE K
3:1
K
K
+
-
BALANCED OUT
GAIN
PEA K LED
PAD
2520
-20
48V
BLO CK D I AGRAM
PREAM P STAGE
ANALOG VU
M ET ER
PO L A RI T Y
PH A SE K
3:1
K
K
+
-
BALANCED OUT
GAIN
PEA K LED
PAD
2520
-20
48V
API 312 Mic Pre
The 312 is one of API’s most sought after and famous
mic preamps. First introduced in the 1970s, it is well known and
respected throughout the recording industry, and is the building
block of the modern 3124 rack unit.
www.APIaudio.com
the API 312 Mic Pre combines our 2520 op-amps and proprietary
transformers. It delivers the analog warmth, massive headroom
Following the success of the hand wired 312 50th Anniversary
Edition, this standard production version offers the classic API
sound at an affordable price. Like all API products, the 312 is
Based on API co-founder Saul Walker’s original designs,
and unmistakable sound for which API is known,
in a convenient 500 series format.
backed by API's unique five year warranty.
312 Mic Preamp Features:
•API's Classic 312 Microphone Preamp in a 500 Series module
•Vintage Style Analog VU Meter
•Maximum 69dB of gain
•Traditional API fully discrete circuit design with 2520 Op Amp
•Proprietary AP2516 Input Transformer
•20 dB pad switch
•3:1 Output Transformer Tap Selection
•Switchable 48V phantom power
•Peak LED
•API’s Five Year Warranty
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