Api Audio 2500+
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- This item is covered for 3 years
The Essentials to Know About the API 2500+ Stereo Bus Compressor
The Essentials to Know About the API 2500+ Stereo Bus Compressor
- Legendary stereo bus compression with Blend function for integrated parallel compression.
- API dynamic signature thanks to 2520 amps and the THRUST circuit for punchy lows.
- Two detection philosophies, " Old " (feedback) and " New " (feed-forward), to shape punch and color.
- Variable L/R linking, auto make-up gain, and Sidechain input for full mix bus control.
Manufacturer Information
Api Audio
https://www.apiaudio.com
service@apiaudio.com
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A Modernized API Classic
The 2500+ continues the sonic aesthetic of API consoles and outboard gear while adding refinements expected in modern studios. The "+" version modernizes the famous 2500 by notably integrating a blend control for parallel compression, while preserving the musicality and robustness that have made the brand renowned.Who Is It For and What Are Its Uses?
Ideal on the mix bus to "glue" a mix without squashing it, the 2500+ also excels on drum buses, instrument groupings, and summed mixing configurations. Its ability to shift from transparent compression to more energetic action makes it a relevant choice for mixing and pre-mastering.Key Features to Sculpt Punch and Tone
THRUST: Solid and Controlled Lows
The patented high-pass filter, placed before the RMS detector, protects detection from low frequencies to preserve the impact of the low end while controlling the entire mix.Two Detection Behaviors
The "Old" mode (feedback type, legacy of the API 525) offers more musical and organic compression. The "New" mode (feed-forward type) provides faster and more precise action, ideal for modern punch.Variable Stereo Linking
Finely adjust the degree of correlation between left and right channels: from dual-mono compression to perfectly linked stereo, preserving width and image stability.Blend and Make-up Gain
The Blend control facilitates parallel compression without external routing. The automatic make-up gain maintains a constant output level during threshold or ratio changes.Technical specifications
| Dual-channel design | linked stereo or use as two separate units. | Selectable envelopes | "Old" (feedback, API 525 type) and "New" (feed-forward). |
Questions frequently asked
API Audio 2500+: Is parallel compression built-in?
The Blend control allows mixing the compressed and uncompressed signals directly within the unit, without any external routing.
How does the THRUST mode work on this compressor?
The THRUST high-pass filter is placed before the RMS detector. This position limits the influence of low frequencies on the detection. The impact of the low end can thus be preserved during compression.
What is the difference between the Old and New modes?
The Old mode uses feedback detection inherited from the API 525, providing organic compression. The New mode operates in feed-forward for faster and more precise action.
Can the 2500+ process two separate sources?
Its dual-channel design allows for either stereo linked use or two separate processes. The variable stereo link adjusts the correlation between channels, from dual-mono to full link.
Does the output level change with threshold or ratio?
An automatic make-up gain maintains the output level when threshold or ratio settings vary.



