Description
API A2D – The first API product with an integrated digital output. The A2D 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. Moreover, precise control of both the analogue gain and the level feeding the digital section means the microphone signal may be kept super-clean if desired or driven harder to achieve the warm, punchy “API sound.”
API A2D Mic Preamps with Digital Output – A virtual console Experience
The A2D Analog section consists of the circuitry contained in two 312s, half of that of the popular API 3124+. In addition, a level control pot with an expanded 20-segment metering system shows precise mic gain levels. The 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. Moreover, each analogue input contains a balanced low-Z input XLR connector and a high-Z instrument input on a 1/4″ jack.
The Digital Selection Includes:
The digital section of the A2D 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 analogue connectors include an XLR input and output for each channel, as well as a balanced 1/4″ TRS insert to the A/D converter. The TRS insert allows the A2D to have external analog processing devices inserted in the audio chain (EQs, compressors, etc.)
The A2D’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.
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.
The main features of the API A2D include:
- A pair of signature 312 mic preamps
- API 2520 op amps
- 20 Segment LED metering on both Analogue and Digital sections
- Mic and Line inputs
- Polarity, Phantom power, Input pad, 2:1, and Mic/Line switches
- 6 sample rate choices
- External Super Clock Input
- Multiple A2D units can be slaved together
- Insert point provided between Analogue and Digital sections
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