I've always left purchasing a sub for my 5.1 (music/film/gaming) system, not sure why maybe because I thought one wouldn't fit, would be too expensive for a good one or maybe because the only subs I have experience of were car audio and HT sub/sat systems. Budget was upto £500 (preferably around 3 though) I had shortlisted the Rel Q50, Pro50 and the CHT-10. Measuring up the rel and velodyne would *just* fit, placement would be restricted to the corner also whereas the Pro50 would comfortably fit behind my front left b&w 602. I knew all 3 were great subs, I had faith in uncle erics opinons that the cht-10 would perform, plus the Q50 would probably be the best bet from the rel camp. After reading some more particularly glowing reviews (and chatting to the guys at hifijunkies) plus the size issue, I decided to plump for the Pro50 in black. Hifijunkies were superb (I really can't rate these guys enough) all through the order, and while they didn't have any in stock the day I ordered some came in the day after and arrived on my door the next day. Out of the box it comes, not expecting much from the povety spec black finish but it looks superb in the high gloss piano black finish. Controls feel very nice, nice switchgear, the whole unit feels very well made. Plug in the power and phono cable from the 3802 leaving all the knobs at their default position I fire up some Black Sunday. I'm greeted with big bouncy bass more akin to the trunk of a corsa. Ok time to break out the SPL meter. After being a little nervous of the sub test tone noise I finally get all levels calibrated. I remember some saying to have the sub at maximum gain and adjust on the amp. Well with the denon on it's lowest setting I adjust the sub gain slowly until the meter shows me what I want to see. It finished with the sub gain at about 85% and the denon on it's lowest -12dB. Adjusted the phase to 90 as instructed for downfiring subs in the manual and left it at that. The manual states 'at one end' the crossover control is bypassed, I presume this meant it's default lowest setting of 40Hz. All speakers now set to small with an 80Hz setting. I'll forward on now until last night when I gave the sub it's first real work out, Monsters Inc dvd. I was well pleased with my setup, low frequencies blended perfectly with the 602's giving the impression of a single, low reaching speaker. As others have commented one of the first things I noticed was not the bass but the midrange seemed to get a slight boost in presence. Back to the film, the first real indication of the sub doing it's job were Sully's thumping footsteps which sounded great. Everything sounded very tight and controlled, not a hint of flabbiness. They kept pace perfectly with the 602's. ***tiny weeny monsters inc. spoiler ahead*** The part where boo, the little girl started to wail causing the power to go mad made me nervous. Suddenly there's this big blast of bass, getting wilder and wilder as the kid screams, I was just about to reach for the volume control (-6dB dts) as I thought such a small sub will surely croak under the pressure. Not a thing, no flapping, slapping or any sort of distortion, just rattling doors and big clean bass. I was well impressed to say the least, especially as the pro50 weighs in at a modest 8' and a 'measley' 50 watts. Musically so far the Pro50 has seen some Nelly, Cyrpress Hill and a touch of Eminem. I think the best way to describe it's musical abilites is very punchy, tight and definitely not flabby. In short...I love it.