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API 2500 Stereo Bus Compressor

Discrete stereo bus compressor with API 2520 Op-Amp, variable threshold between -20 dBu and +10 dBu, and selectable ratio, attack and release times

MFR# 2500

Product Description

The API 2500 is a versatile stereo bus compressor that allows adjustment of sonic qualities that can alter the punch and tone of the stereo mix. The 19" rack-mountable unit features API's patented "thrust" circuit for a chest-hitting, punchy bottom end. With its dual-channel design, the API 2500 is set up for stereo compression, but can also be used as two separate units via a single compression setting. The 2500 boasts a range of parameters that make it incredibly musical.

API pushes the envelope of flexibility further with selectable "old" or "new" compression. The old-style uses the feedback type of compression found in the API 525, Universal Audio 1176, and the Fairchild 660/670. The new style uses a feed-forward type, similar to other popular compressors.

The output stage features API's auto-makeup gain button, permitting the user to vary the threshold or ratio while automatically maintaining a constant output level. Fidelity is ensured with an all-discrete, fully balanced design, and two front panel VU meters show input, output, and gain reduction levels.

FEATURES:

  • API 2520 Op-Amp
  • Variable threshold between -20 dBu and +10 dBu
  • Selectable ratio, attack and release times
  • Patented THRUST selectable high-pass filter before RMS detector
  • Variable link between left and right channels
  • Old "feedback" or new "feed forward" compression
  • Soft, medium or hard knee for easy to sharp compression
  • Auto or manual gain make up
  • 1/4" balanced side-chain inputs
  • Output clips at +28 dBu

Product Specifications

Condition New
Tube or Solid State Solid State
Channels Dual-Channel
Chassis 19-inch Rack-mount
Rack Spaces 1U
Digital I/O No
Compression Type VCA

Product Reviews

5 out of 5 stars.
Review Count (2)

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Thrust Circuit is Amazing!

By Mike P on April 4, 2020

The Drum Bus magic box!!!!!!!!!! My drum tracks always lacked that punch, loudness, and vibe of professionally mixed songs. After I got this box on the reccomendation of my VK rep, things done changed! I've been using my UA plug ins for individual compression and EQ on the kick and snare and then mixing all the drums tracks out to a stereo bus/hardware insert, through the 2500 and back in. It's been a game changer for me.

By James on May 5, 2017

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
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In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
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The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
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