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An obsessively accurate emulation of API’s flagship compressor.

The API 2500 Bus Compressor is a permanent fixture on the stereo bus of many of the world's top engineers and producers. Considered the best of the Paul Wolff-era API circuit designs, this famed compressor adds energy, movement, and tone to stereo mixes and subgroups unlike any other compressor.

The API 2500 Bus Compressor plug-in for UAD-2 hardware and Apollo interfaces is a spot-on emulation of this classic compressor, capturing its all-discrete signal path with Thrust® circuitry — and features a fanatically detailed modeling of API's custom transformers and 2510 and 2520 op amps.

Glue together your stereo mixes and subgroups with the world’s finest circuit emulation of the iconic API 2500 compressor

Select between "Old” and "New” compression, with feedback or feed-forward sounds

Sharpen your workflow with plug‑in‑only Mix and Headroom controls

Punch up low frequencies with API's patented Thrust technology

Contour your mix's stereo interaction with percent-based L/R Link controls

Mix with artist presets from Jeff Balding (Faith Hill), Vance Powell (Jack White), Ryan Hewitt (Red Hot Chili Peppers), and more

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  • Runs in realtime with Apollo on Mac and Windows
  • UAD Spark native version included
  • Requires Apollo or UAD hardware
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TAKE A LISTEN

API 2500 5-Minute Tip
API 2500 5-Minute Tip

API 2500 5-Minute Tip

Learn how to use the API 2500 on drums, bass, guitars, and your entire mix.

The Only End-to-End API 2500 Emulation

The Only End-to-End API 2500 Emulation

Poring over proprietary "for-your-eyes-only" schematics made available to Universal Audio by API, our team of DSP experts analyzed two classic API 2500s — rackmount and in-console — ensuring one of UA's tightest behavioral circuit models to date. Working together with API's engineers, we scrutinized every facet of the plug-in against its analog counterpart, delivering the definitive representation of this iconic compressor. Early beta testing with UA artists confirmed that the plug-in ranks among the most accurate analog emulations in UA history.

Built for the 2-Bus

Built for the 2-Bus

API designed the 2500 compressor with program material firmly in mind. Its Release control includes fixed or variable options, while the Attack, Threshold, and Ratio controls offer musical tweaking throughout their range, making the API 2500 a toneful dynamics overlord for your stereo bus.

Shaping Tone and Dynamics

Shaping Tone and Dynamics

The API 2500 allows selection between three custom-voiced compression Knees — Soft, Medium, and Hard. You can shape the tone further with two compression types; "Old" for characterful peak-detection harkening back to API's earliest, highly-coveted 525, or "New", which features a modern feed-forward design.

Thrust Control for Unmatched Punch

Thrust Control for Unmatched Punch

Taken from their Paragon series of consoles, the API 2500’s Thrust feature puts a filter before the RMS detector, evening high and low frequency energy — so neither triggers the compressor more than the other. This gives you a tight hallmark API punch beyond any other compressor.

Enhance Energy and Motion

Enhance Energy and Motion

Most compressors only allow you to turn left/right linking on or off. The API 2500 Bus Compressor Link parameters allow for precision control of your mix's L/R dynamic interaction. Set exactly how much dependence — or independence — you want your L/R spatial dynamics field to have, and hone your dynamic contours even further with the Shape control.

Watch The Reviews

      Key Features

      Painstakingly modeled by Universal Audio's plugin design team, licensed and authenticated by Automated Processes, Inc.,
      Beloved Paul Wolff-era API design, exclusively measured from the all-discrete, in-console version of the 2500
      Provides the entire circuit path and control set of the API hardware including custom API op amps and transformers
      Signature API 2500 features include patented Thrust® sidechain filtering, "New" and "Old" Compressor Types, and Variable Sidechain Link
      Plug-in-only features include Dry/Wet parallel processing and Headroom for user-customizable operating level
      Includes artist presets from Vance Powell, Jeff Balding, Ryan Hewitt and Adam Hawkins

      Customer Reviews

      API 2500 Bus Compressor

      Overall Rating

      A. Viktorovich

      November 14, 2022

      Great of 2500

      One of the most beloved compressors

      D. Lee

      October 14, 2022

      Sounds great subtle or aggressive!

      I'm a fan of this. My favorite drum bus comp!

      N. Liebich

      August 14, 2022

      Like the hardware

      I’m happy to own the HW of this… but the Plug-in is the real deal and so much more handy! Going to sell the HW!

      I. Papagiannidis

      July 18, 2022

      The best for mixbus

      Perfect for mixbus and almost every source! The weight and lows it gives to drums are amazing! Combined with distressor is a grate combo!

      R. Chiga

      July 18, 2022

      ohhhh! wow!

      A new go to on my mixbus! really amazing even if subtle compression is on!

      F. WIOROWSKI

      July 16, 2022

      Must have !

      I have tons of plugins comp, and some hardware too. This API 2500 is really nice, can be subttle or not, i really like it in loud mode. It s amazing on mixbus.

      J. Rosso

      July 14, 2022

      An inspring compressor for me to compress hard

      The compressor of the pros

      h. kim

      July 8, 2022

      oh..? wow..!!

      i love it..!!

      R. Matias

      June 28, 2022

      Quality

      Workhorse Im going to use on every track

      C. Domenico

      June 17, 2022

      Bus Compression

      The enthusiasm lies in its sound and its numerous special functions. After all, only the best should be used for processing sums :-)

      R. Bouma

      June 16, 2022

      A clean useful comp-lim

      Not something I would buy as hardware but in plug in style yes. The sound is good on drum tracks. From acoustic to EDM.

      D. Morris

      June 16, 2022

      secret sauce

      I will use this on all my productions

      P. VALLEJO

      June 13, 2022

      Best compressor for Drums

      I have many compressor plugins., But nothing compares to this one if you use it with drums. Really natural and organic...best purchase in some time !!

      A. Gray

      June 12, 2022

      Infamous bus compressor

      So versatile

      j. Pettit

      June 10, 2022

      Api on the buss

      I'm an API guy and I owned an actual one of these. I enjoy that the plug is easier for me use in the box. It's still pretty new so I'm still getting used to it but I sent a couple songs out to a client today and got an email back congratulating me on the quality sound of the tracks. I like that.

      D. Faggiolino

      May 25, 2022

      API 2500

      Bus Compressor at its best!

      r. lewis

      May 18, 2022

      Favourite 2500 plugin version

      The api 2500 is one of my favourite bus compressors, excellent for shaping, making drums especially punchy and bringing out the room tone in creative ways, I’ve tried a few different plugin versions, waves, sk note (which I love), Softube American class a (which is excellent but limited controls in console 1).

      Uad version is my favourite yet, doesn’t quite capture the sense of space for whatever sound you send it like the hardware, but it’s close, also like the tone of the hardware slightly more, but the compressor action is superb. Find the dsp hit to be reasonable, overall happy with my purchase.

      K. Dobracki

      May 18, 2022

      Perfect bus compressor

      It is a must in every studio!

      R. Tolbert

      May 16, 2022

      More versatile than you think.

      My favorite thing to use the 2500 on is BGV's. There is just something about it.

      H. Holzheu

      May 16, 2022

      API, Great Sound

      It works great, on all busses and instruments, that‘s what I missed.