NHT X1 crossover with both XLR and RCA in and out , also has LFE in for sub out of HT receiver with pass through. Outputs are high pass and sub. Right , Left and Sub in are mixed for sub out on RCA or XLR. high pass filter 50,80,110 Hz, stereo or mono, extra gain switch for 10db. Master gain and LFE gain on front with phase and low pass cutoff settings. Nice crossover. Rating this 7/10 but I think its closer to an 8, front is excellent with no wear, small light scratch on top that you really have to look hard to see.