So if anyone read my earlier thread on this amp, they know that I had SERIOUS reservations about this amp.... But I bought it anyway with the assurance that I Could return it anytime in the next two weeks if I was unhappy. My Current setup included a BBE Bmax-T preamp, Crest LT1000 power amp and a Schroeder 410. The power amp died, and I was forced to use an AMPEG SVT-5 Pro in the meantime. ( not recommended, but that's another story) I was not unhappy with my sound from the BBE rig, but I wasn't thrilled either, and the weight of this crap in the road-case was beginning to be a serious problem. I had this nice, warm sound from my rig, but it sounded a bit undefined and when paired with the Schroeder gave off some unpleasant frequencies live, which I couldn't quite seem to dial out. This was not boominess per se, but kind of a very low mid wave that had a tendency to sound unpleasant during breakdowns and softer parts. After much in store use, I bought the Evo. I was VERY concerned about not getting enough volume, as the Evo only gives 575 watts and I had been running almost 1300. I was also concerned about the Subwave octave circuit, as it seemed to track really slowly in the store. I was later to discover why. I Brought the amp back to the rehearsal space. The first thing I noticed was what a pleasure this thing is to move around. It weighs next to nothing for such a powerful amp. And it IS powerful. Perhaps something is lost in the translation between English watts and American, but from a pure power standpoint, the Ashdown 575 watts seemed more responsive to transients and seemed to have more in reserve than the 1000 Ampeg watts listed on the back of my Loaner SVT-5, but more on this later. Aesthetically, I loved the look. The controls were firmly mounted and had a very smooth feel, altho I would liked to have seen metal posts on the sliders as opposed to plastic, and the face lettering seems like it may wear off over time. I love having the DI on the front panel along with the tuner out and mute button, and of course the VU meter is a great touch. First off, this amp has a very powerful eq section. This is of the interactive sort where you can tell each control is run serially, so that if you bottom out all the controls, you have almost no signal left at all. The amp includes a FLAT / SHAPE button which is similar in effect to a lot of these type of controls, which aim to scoop out your sound a bit, and add punch. I left it flat. The main eq dials: Bass, Mid and Treble, are very cool. The bass Frequency seems to be set very low, and have a very limited bandwidth compared to the other two, in that you FEEL more bass as the dial turns, rather that actually hearing an increase in bass frequencies. This is an excellent sound in my opinion as a lot of amps seem to just increase boom and loose definition once the bass dial passes 3'oclock. The mid sections seems to have a much broader bandwidth than the others. If you listen really carefully, you can almost sense that the boosted bandwidth gets narrower the more you boost it. In other words, with the dial set at 2 o'clock, you get a very nice, subtle boost in a very wide range, and as you keep boosting, the center frequency makes itself more evident, as cutoff frequencies east and west of center are boosted slightly less. This is an excellent system, as you never find yourself adding honk or notching the tone at the extreme ends of the control. The treble Controls works in the same fashion as the bass, adding in a lot of boost gives you this nice high-end sheen to the notes, without any harshness at all, even with the cabinet crossover dimed. There are a world of tones available with just these three controls, and they are all useable. I can't stress enough how powerful and interactive these controls are. I've never had any experience with an EQ section this well sorted out with the possible exception of the Epifani UL series, and even then they're very different in feel. The In-between each of these bands are two sliders. The first two are labeled at 180 hz and 340 Hz. These seem to act quite differently than the main controls, in that they have a smaller bandwidth and boost or cut those frequency ranges more evenly. Boosting the 180kz slider ever so slightly gives that musical boom so many fans of the classic bass sound adore, however this control requires a judicious touch, as boosting it much past 75% of it's range can clip the amp....it's that powerful. I found myself cutting this band slightly, which doesn't affect that fatness of the bottom , but does lend a certain amount of clarity. The 340 hz slider is very useful, and a slight boost brings out that bump that helps you cut through the guitar at any volume. The second set of sliders are labeled 1.3khz and 2.6 khz respectively. There is A LOT of tone here at the first slider, and boosting it to about 80% lent a very serious edge to the sound, without sounding "clanky". The 2.6khz slider should be left alone or used for cut only IMHO, as this is a fairly noisy frequency range to the human ear. All in all, this is the most well sorted and musical eq I've ever used. Now on to the Subwave. In the store this effect seemed to track slowly. This was due to the fact I wasn't using enough input volume. The input stage has a lot of room in it and seemingly the more you give it, the better it works. I also learned in application this is meant to be a more subtle effect than a regular Octave pedal, in that it will add a bigger bottom to your sound at it's extreme, and fatten things up slightly when used more carefully. The Valve drive works this way also. Only at its's extremes will you get a really distorted tone, and you hafta be past noon to get a real overdrive, but I found engaging this control and setting it at about 10 o'clock gave me the sound I wanted and retained the clarity I need. Now, The power section. As I said, I was very nervous about these 575 watts. Not only because I was used to a lot of power, but because I was concerned about under powering the cabinet. I gave Jorg Schroeder a call, and he said that under powering was unlikely, and that he knew several Ashdown / Schroeder users who were very happy. Now here's the clincher: This thing actually SOUNDS louder than the previous 1200 watt setup. Now there's a lot of argument regarding loudness vs. watts and perceived volume etc, and I will leave that to the tech-heads, but I can tell you this thing SEEMED louder than the old setup. I had the Input about 3 o'clock ( so that my loudest B String transients just hit the red-zone on the VU meter ), and the master at about 3 0'clock as well. Just rockin. Filled the room up in a way the BBE never did even with 1200 watts behind it. Maybe it was the eq, who knows, but am VERY satisfied. On the downside, the speakers did begin to fart out at a certain volume due to the lesser wattage, and you could hear and feel the power section losing it's grip on the cones a lot sooner, but this was only at volumes which almost noone would need in a live scenario. In return I'm developing a softer touch with my right hand, and the volume is just killer. And the fans are barely audible even after playing at these settings for over 3 hours. A bonus. All in all the Ashdown has quieted all my concerns and ended up being a peasant surprise. I highly recommend this amp for players of just about any style.