“The API 2500+ is the epitome of my very favourite kind of bus compressor: one that adds deliberate sonic character & personality in its own uniquely distinct way. The variations of punch & presence from the Thrust detector, the noticeable differences in knee selections and the feed-back/feed-forward compression styles all offer a very broad palette of subtle & drastic colours to add to your canvas. With the rich sounding 2520 op amps plus the new mix/blend circuit superb for parallel compression use, the 2500+ has become an essential part of the way I make records. Vital!”
— Julian Kindred, Producer/Engineer, London, England
(Ellie Goulding, Nao, Aimee Mann, Hammock, Max Cooper)
The API 2500+ Stereo Bus Compressor allows adjustment of sonic qualities to alter the punch and tone of the stereo mix. The 19-inch, rack-mountable unit features a dual-channel design that can be configured for stereo compression or for use as two separate units via a single compression setting.
Among the many qualities which make the 2500+'s unique is its use of API's patented THRUST® circuit for a chest-hitting, punchy bottom end. Another distinctive feature of the 2500+ is its selectable "old" or "new" compression, with the old style using the "feed back" type of compression found in the API 525, and the new style using the "feed forward" type in which the compressor side chain is fed directly from the unit input. Additionally, the output stage of the 2500+ offers an auto-makeup gain button that permits the user to vary the threshold or ratio while automatically maintaining a constant output level.
Added to the 2500+ is the Mix/Blend circuit. First featured in the limited production 50th Anniversary Edition, Mix/Blend control provides either cross fader or parallel mixing of the compressed and uncompressed signal. Three different user settings are offered:
The 2500+ ensures fidelity with its fully balanced design and two front panel VU meters showing input, output and gain reduction levels. The 2500+ features API's industry exclusive five-year parts warranty and offers the user the reliability, sonic excellence and long life characteristic of all API products.