This unit works great with the JL Audio CleanSweep CL-441dsp unit. Just be aware that your input connections may not match those specified in the instruction manual. For example, I needed to 2-way sum mid-range and tweeter signals, and I had to use inputs A (tweeter) and C (mid-range) for the CL-441dsp calibration to work properly. The instructions incorrectly specified using inputs A and B, since C is a dedicated low-pass signal input. Regardless, it is working great now, and I highly recommend it. Also be aware that older CleanSweep CL-SSI units have flawed hardware and will not work properly (according to JL Audio tech support--call and they can diagnose this based on serial number). Before buying from SonicElectronix, I purchased another unit on eBay that was manufactured in 2006 that did not work and had to be returned.