The API 2500+ Stereo Bus Compressor Offers Users Reliability, Sonic Excellence and a Long Lifespan 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. The 2500+ ensures fidelity with its fully balanced design and two front panel VU meters showing input, output and gain reduction levels. 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: OFF - compressed signal only X (Cross) - allows the MIX control to adjust between 100% uncompressed to 100% compressed - increasing one, while decreasing the other || (Parallel) - allows the MIX control to dial in compressed signal to blend into the uncompressed signal, (which remains the same). 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. API 2520 Op Amps Expanded variable threshold between -20 dBu to +20 dBu Selectable ratio, attack, and release times Patented THRUST® filter with 3 settings for frequency dependent side chain control Variable link between left and right channels Old "feed back" and new "feed forward" compression Soft, Medium, or Hard knee for easy to sharp compression Auto or manual gain make up 1/4-inch balanced side chain inputs Output clips at +32 dBu New Mix/Blend circuit "Over Threshold" LED illuminates when input audio crosses the set threshold Stereo analog meters to show input level, output level, and gain reduction Full hard-wired relay bypass SPECIFICATIONS Rear Connectors: XLR input, 1/4-inch side chain, XLR output Input Impedance: 60 kOhms, Balanced Output Impedance: 75 Ohms, Transformer coupled, Balanced Maximum Output Level: +32 dBu Frequency Response: ±0.5 dB 20 Hz to 50 kHz Signal to Noise Ratio: 120 dB Power Consumption: 28.8 Watts Size: 19 x 1.75 x 10.5 inches / 483 x 44 x 267 mm Size (Boxed for Shipping): 23.25 x 6.5 x 16 inches / 591 x 165 x 406 mm Unit Weight: 9.4 lb / 4.26 kg Shipping Weight: 13.3 lb / 6.03 kg Manufacturer: Automated Processes IncModel: 2500+SKU: I647442-N-0-WHXCWe are Chuck Levin's Washington Music CenterSince 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.
