Kinda on a whim (after playing it for about an hour in the store), I traded in my Fender Bassman and purchased a GB NEOX400-112T. I had been looking for a more tuby sound to compliment my 74 Fender Jazz RI. Here are some of my initial impressions: Physical Characteristics: This is the perfect sized amp for me, since I am currently not playing with a number of different bands. At 57 lbs, it is quite easy to carry and it's size makes it less awkward than other combos. The built in carry handles on the top are well placed and wide, which means the don't dig into your fingers. The cabinet seems solid. There is a spring-loaded handle on the bottom of the amp which can be used to tilt the cabinet back into a monitor-like position. Because it is spring-loaded, it can be closed by simply tilting the amp back slightly. The knobs and buttons all feel solid and turn smoothly. There are no center detents on the eq knobs, which is mildly annoying. The LEDs used on the amp are VERY bright. Almost too bright. There is a footswitch which controls the preamp section that I will discuss below. Controls and Electronic Features The main reason I purchased this amp is that the preamp is switchable between solid state and tube, a really great feature for someone like me who is playing a mix of originals and covers. The preamps can also be mixed, either by a button on the face or by the footswitch. Essentially, you get three preamps in one. The "signal shape" section allows you to choose between a high boost, mid scoop, and low boost. There is a five-band eq, the master volume and a limiter. I'm not sure why anyone would turn the limiter off, but you could if you wanted to. The rear of the amp has an effects loop, a direct out, and a speaker out in both 1/4 and speakon. This amp is capable of 425 watts at 4ohm, and the internal speaker is 8 ohm. This means that you can add another 8 ohm cabinet to move more air. The fan seems pretty quiet. Playing impressions So far, I love the tone of this thing. The switchable and mixable preamps seem very versitale. The tube preamp has a very warm tone, and is capable of a little grit when the gain is pushed. The tubey sound, however, seems to drop off at lower volumes. The solid state is clean, but not sterile sounding. The signal shape seems to be a great feature. The low end extend lowers the low frequency roll-off response of the pre, to allow better response from a 5-string. Not owning a fiver, it still sound pretty good on my 4. Very fat, Precision-like tone. The mid-scoop does what you would expect. The high attack section really brightens the tone and would be great for a bass solo or when a bright, more modern tone is needed. Volume-wise, this thing gets LOUD. I haven't played it in a band setting yet, but it should be more than adequate even without an extension speaker. I played it with a GB NEOX 112 extension cab at the store, and the volume is enough to give you a headache. Unfortunately, my camera and my wife are in St. Louis, so I have no pictures to share. Here is a link to the picture on the website: http://www.genzbenz.com/pics/models/neox400-112t_lg.jpg I will update my review in the next few weeks as I get a chance to play this amp some more. If anyone else has more experience with this amp, please feel free to add to this thread.