I use it for two years to a motor driver 4 "JBL 2425J and 2426J in multicast. (Use 2 x 16 Ohms per channel into 8 ohms = turning. Very good clarity of the treble, nothing to say (cut passes up to 800 Hz). Beware of turning off the device, the relays open late, once the amp is already cut, so a large crack is heard on your speakers (although lower knobs before turning off the amp, otherwise you destroy your bowls). I tested it on one of my pairs of RCF ART 300: very good treble, medium high, but the bass is very dry. I do not get much roundness with the Inter-M. I am a little disappointed knowing that it's still the CROWN! Value / price ... Yeah it's still tough and not very expensive. With the experience I not think of buying models in this series. I put 7 / 10 for the history of snapping to the extinction of the device. (FYI, I have a XLS Series D)