API 2500+ Stereo Bus Compressor

The API Audio 2500+ is an analog stereo dynamics processor based on the famous API 2500 bus compressor. This powerful 1U rack processor features classic API 2520 op amps, a unique THRUST Filter, two compression modes, and a versatile Mix/Blend circuit. Combining classic API engineering with an enhanced feature set, this updated classic brings iconic API sound to any mix. If you're in search of a compressor with maximum versatility, look no further than the API 2500+.

SIGNATURE API SOUND

Most importantly, the API 2500+ delivers the same characteristic tone and punchy dynamics made famous by the original API 2500. Combining tried-and-true circuit design with modern updates, it delivers the rich analog tone you expect, plus added flexibility. Enjoy classic API boldness on your mix bus as well as drums, guitars, vocals, and more.

CLASSIC API 2520 OP AMPS

Celebrated for their linear response and low distortion, API's classic 2520 op amps provide a clean signal path that preserves every detail of your sound. These op amps support consistent, noise-free performance, allowing you to dial in subtle leveling or aggressive limiting. These premium components give you a clean slate to process your sound without unwanted noise or distortion.

PATENTED THRUST FILTER

The THRUST filter precisely sculpts low frequencies using frequency-dependent sidechaining. Three available settings allow you to tailor the unit's low-end response for processing bass-heavy mixes, kick drums, bass guitars and more. This patented circuit minimizes muddiness and enhances punch, delivering a tight and impactful bottom end on any source.

FEED-BACK OR FEED-FORWARD COMPRESSION

The API 2500+ offers two selectable compression modes for ultimate flexibility. In "Old" (feed-back) mode, the detector signal is derived from the output, providing smooth, vintage-style compression. In "New" (feed-forward) mode, the signal is taken directly from the input for faster transient response. This dual-mode design provides maximum flexibility for different genres and instruments. Use this feature to achieve either classic warmth or modern precision with ease.

MIX/BLEND CIRCUIT FOR PARALLEL COMPRESSION

The innovative Mix/Blend Circuit provides detailed control over the compressed and uncompressed signal blend. When engaged, you can choose from two modes. Cross mode (X) automatically balances the dry and processed signals as you adjust the Mix knob. In Parallel mode (II), the Mix knob blends the compressed signal with a fixed dry signal. This flexible circuit lets you enhance mix depth and maintain natural dynamics simultaneously.

EXPANDED THRESHOLD OPTIONS

The API 2500+ introduces an expanded variable threshold range of -20 to +20 dB. This extended range allows for precise tailoring of dynamics, accommodating a wider variety of audio sources and mixing styles. Whether you want gentle dynamic control or heavy compression, this feature ensures optimal performance for any application. From delicate acoustic recordings to energetic drum busses, the expanded threshold lets you dial in the ideal level of sensitivity.

AUTO MAKEUP GAIN

The API 2500+ features an optional Auto Makeup Gain function for maintaining consistent output levels. This setting automatically compensates for gain reduction without manual adjustment. No matter how hard you push the compressor, Auto Makeup Gain guarantees a smooth experience. Save time and focus on getting the sound you want without being tricked by volume changes.

API 2500+ STEREO BUS COMPRESSOR FEATURES:

• Signature API sound with bold tone and crisp detail
• API 2520 op amps for low-noise, linear performance
• Patented THRUST filter for low-end control
• Choose from feed-back or feed-forward compression
• Innovative mix/blend circuit for parallel processing
• Auto makeup gain for consistent output levels
• Dual-channel design for linked stereo or dual-mono processing
• Fully balanced design with stereo VU metering
• 1U, 19-inch rack-mount chassis