Datasheet

Mic Preamps with

Digital Output

Features:

 A pair of signature API 312 Mic Preamplifiers

 API 2510 and 2520 Operational Amplifiers

 20 Segment LED metering on both analog and digital sections

 Mic and Instrument inputs

 Polarity, phantom power, input pad, 2:1 transformer routing, Mic/Line switches

 Six sample rate choices

 Sync to external Work Clock with feed through BNC

 External Super Clock input

 Ability to be slaved with other A

D units

 Insert point provided between analog and digital sections

The first API product with an integrated digital output, the A

D contains a pair of API 312 Mic

Preamplifiers that feed an A/D section with a set of standard digital interface outputs, multiple

sample-rate choices and internal or external clock options. Precise control of both the Analog

gain and the level feeding the digital section means that the microphone signal may be kept

super-clean if desired or driven harder to#achieve#the#warm,#punchy#“API#sound.”

The A

D Analog section consists of the circuitry contained in two 312s, half of that of the popular

API 3124+. A level control pot with an expanded 20-segment metering system shows precise

mic gain levels, while control switches include polarity, 48v phantom power, input pad, Mic/Line

select and 2:1 transformer routing, which selects a lower gain contribution from output

transformer. Each analog input contains a balanced low-Z input XLR connector and a high-Z

instrument input on a ¼”#jack.

The digital section of the A

D includes two API discrete 2510 amplifiers with level pots to adjust

the feed to the A/D converters, each with a corresponding 20-segment calibrated meter. A multi-

position switch selects the desired sample frequency. The External Sync LED will light when an

external clock signal is used.

Rear panel analog connectors include an XLR input and output for each channel, as well as a

balanced ¼”#TRS insert to the A/D converter. The TRS insert allows the A

D to have external

analog processing devices inserted in the audio chain (EQs, compressors, etc.).

The A

D’s#digital interface connectors are a SPDIF single-ended RCA connector and an AES

digital out on XLR. A coaxial BNC accepts external Super Clock, which will illuminate the front

panel EXT SYNC LED when locked.

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2 AD Mic Preamps with Digital Output Features:           A pair of signature API 312 Mic Preamplifiers API 2510 and 2520 Operational Amplifiers 20 Segment LED metering on both analog and digital sections Mic and Instrument inputs Polarity, phantom power, input pad, 2:1 transformer routing, Mic/Line switches Six sample rate choices Sync to external Work Clock with feed through BNC External Super Clock input Ability to be slaved with other A2D units Insert point provided between analog and digital
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AD Mic Preamps with Digital Output Additionally, the A2D comes with a pair of 9-pin D-sub connectors that allow the multiple units to be linked together with all units operating off the first sample-rate clock in the chain. Automated Processes Inc. 8301 Patuxent Range Road Jessup Maryland USA 20794 301-776-7879 sales@apiaudio.