Feb 24, 2020 · Like the 1176, the API 2500 provides selectable ratio, attack, and release times. Additionally, it includes API Thrust, which is a switchable high-pass filter before the detector circuit. This can be useful if you’re using the 2500 as a mix-bus compressor and don’t want low-end signal (like a kick drum) to trigger compression. May 23, 2013 · 1176 DIY compressor help If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.