Dual Analog Mic Preamp with Mic and Line Inputs, Analog and Digital Outputs, Clock Input, and Insert Point Between Analog and Digital Sections
API A2D image 1
API A2D image 1
Sweetwater Savings: $119.75 MSRP: $2,395.00
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Special-ordered from API and usually arrives to you within 1-2 weeks. Please note: special orders cannot be canceled or returned.
Note: While most of the items we sell ship for free, this item does not qualify for free shipping due to special circumstances.

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API Combines Analog Performance and Digital Connectivity!

The API A2D dual mic preamp marks a first for the venerated company — it includes an integrated digital output! The A2D features a pair of premium mic preamps in one chassis, fed into API's proprietary high-quality AD converter. You get both analog and digital outputs for each channel for maxiumum flexibility (especially useful when you're adding other outboard gear into the signal chain), as well as insert points between the analog and digital sections. A pair of 9-pin D-sub connectors let you link several units together while linking them all to a central clock source. As much as you'll appreciate this kind of flexibility, you'll really love the way the A2D sounds when you plug in!

API A2D Dual Analog Preamp with Analog and Digital Outputs at a Glance:
  • A new chapter of API innovation begins
  • API quality shines on the analog section
  • Sterling digital performance and features

A new chapter of API innovation begins
API's reputation as innovators has been well-earned over the decades — and they're not done yet! The A2D is the first product produced by API with an integrated digital input. Recognizing the desire for a high quality solution to raise microphone signals to a workable line level, API put one of their most popular mic preamp designs into an enclosure with their new proprietary analog to digital conversion. The result is a complete package — a pair of superb mic preamps feeding 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 as well as the level feeding the digital section means that the mic signal can be kept super-clean if desired, or driven harder on the analog side for that whallop and impact that can only be achieved by driving the transformer into saturation for that historic API sound.

API quality shines on the analog section
Being an API product, you can rest assured that the A2D doesn't skimp in the analog department. Its analog section consists of the circuitry contained in two API 312 mic preamps, or one half of the popular 3124 quad mic preamp rack product. A level control pot with an expanded 20-segment metering system shows precise mic gain levels. Control switches include polarity, 48v phantom power, input pad, 2:1 transformer routing, and Mic/Line select. Each analog input contains a balanced low-level XLR connector and a high-level line input on a 1/4" jack.

Rear panel analog connectors include an XLR input and output for each channel, as well as a balanced 1/4" TRS insert to the A/D converter. This allows the A2D to have external analog processing devices inserted in the audio chain (EQ, compression, etc.)

Sterling digital performance and features
The digital side of this dual preamp features API's hallmark quality, too. The digital section includes two 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.

Digital interface connectors provided are SPDIF single ended RCA connector and AES digital out on XLR. A coaxial BNC accepts an external word clock, which will illuminate the front panel EXT SYNC LED when locked.

In addition, there are a pair of 9-pin D-sub connectors which allow the linking of multiple A2D units, all operating off the first sample-rate clock in the chain.

API A2D Dual Analog Preamp with Analog and Digital Outputs Features:
  • A pair of signature 312 mic preamps
  • API 2520 op amps
  • 20-segment LED metering on both analog and digital sections
  • Mic and Line inputs
  • Polarity, phantom power, input pad, 2:1, and mic/line switches
  • Six sample rate choices
  • External word clock input
  • Multiple A2D units can be slaved together
  • Insert point provided between analog and digital sections
The API A2D dual preamp adds digital connectivity to a great-sounding analog front end!

What Does "Special Order" Mean?

A special-order product is one that we don't normally keep in stock. We order it from the manufacturer as soon as you order from us. We have great relationships with all the manufacturers we carry, so we can get your special order to you as fast as or faster than anyone else. Remember that special orders are non-returnable and non-cancelable, so make sure the item is right for you. A Sweetwater Sales Engineer can help you decide — call (800) 222-4700 for assistance!

Additional Media

Studio Preamp Buying Guide

Tech Specs

Preamp Type Solid State
Number of Channels 2
Phantom Power Yes
Analog Inputs 2 x XLR (Mic), x 2 x 1/4" (Hi-Z), 2 x 1/4" (Line), 1 x 9-pin
Analog Outputs 2 x XLR, 1 x 9-pin
Digital Outputs 1 x AES/EBU (XLR), 1 x S/PDIF (Coax)
Clock I/O 2 x Word Clock
Rack Spaces 1U
Height 1.75"
Width 19"
Manufacturer Part Number A2D

Customer Reviews

Based on 4 reviews
Write your review


I bought the A2D earlier this year, and I am blown away by the way this unit sounds. This is my go to pre for kick, snare, aggressive style vocals, and guitar cabs. I would recommend this pre amp to just about any one looking for the API sound.
Music background: Recording Engineer, Live Sound Engineer, Pro Musician


Api usually wires things pretty damn hot (not always a great thing) but the A2D is perfect for drums and guitars. Getting a great source for a fair price! MUST BUY!
Music background: Recording Engineer, Musician , Awesome dude.


I have used several different models of API pres, and these sound great. Its a great deal for the price to get 2 API pres and 2 professional converters. Use the spdif out to take your mbox/003 tracking up a notch. These pres are very versatile and can make almost any instrument sound great.
Music background: Producer, Musician, Engineer

It's API

The Pre - I've owned this unit for about three years now. It get's used on every project I track. It's the API sound. What more could you want? When tracking drums, it usually ends up on kick and snare, but you could put it anywhere and it would sound great. It works well with ribbons, condensers, and dynamic mics. It's a really good vocal pre, but won't work for everybody. The AD - the conversion is top notch. I have SSL, Focusrite, DBX, and Digidesign converters. The API are among the best. And you can adjust how hard the converters are hit, separate from the pre, so you can really drive the pre (which can sound fantastic on some sources) and not peak your converters. Great feature. The Routing - this is one of my favorite parts about this piece. You can patch into just the converters, allowing you to run through more analog gear, and back into the API for conversion. It's very versatile. the downside - I have no idea why, but most of these units shipped with superclock instead of word clock. You can ship them back to API for an upgrade to word clock, but it's ~$300. Having only superclock can be a real pain, if you're trying to interface with other digital gear that only has superclock. This is the only reason I didn't give this unit five stars. Other than that, this has everything you need in a preamp/converter.
Music background: Audio Engineer/Producer/Studio Owner
See also: API, API Preamps