Many of you have seen my thread on the Kustom kxb500: http://www.talkbass.com/threads/nad-the-best-amp-ive-ever-heard-kustom-kxb500.1094234/ The Kustom name is not what most think of in great sounding bass amps. But, after posting my opinion of the kxb500, many players have taken the plunge and agreed that the kxb500 is as good or better than amps considered the best amongst today's crop of bass amplifiers at a much more affordable price. Ever since I discovered the kxb500 I have been curious about the kxb800. Last week a deal came along on one I couldn't pass up and it arrived yesterday. Here's my thoughts: First off, it's not a class D and it doesn't weigh 4 lbs like the kxb500. Spec sheet says it weighs 35lbs, but it feels much less. The fact that it is a "lead sled" is one reason I was curious about it as my experiences with Class D overall have not been favorable. First thing I notice is the quality. It appears to be built like a tank, very solid build and the hardware appears to be of very good quality. Features Include: 800 Watt RMS Output @ 4 Ohm Single ¼" Input with pad, signal and clip light, foot-switchable Mute -- flashes when engaged Three rack space, solid steel chassis - rugged construction for years of touring. Three band EQ, each with Individual Frequency mid-point select. Bass (50 / 100Hz) Mid (400 / 800Hz) Treble (3k / 6kHz) Nine band Graphic EQ for the Ultimate in tone tweaking in a concert environment Fully vented front and back, two speed fan cooled for whisper quiet operation manual:http://www.kustom.com/Content/20136/KXB800-manual-RevB-07Oct2011mc.pdf When turning it on there is some fan noise, but nothing obnoxious. Plug in my bass and immediately I notice is how similar the tone is to that of the kxb500. Uncolored, sounds like my bass. The EQ is voiced slightly different than the kxb500, but I think I might actually like it better. I'm able to get a tighter and more focused tone. I don't know if that is the EQ or the power section, but that's what I hear. It also seems to have more body to the sound, and that I would guess is more attributed to the power section. The graphic EQ is very useful in dialing it in even better. Haven't had it on a gig yet, so not much to add at this point other than the power difference is VERY noticeable! It sounds MASSIVE!! The only other 800 watt amp I have had very recently is the GK MB800, and although it was a very powerful amp, the tone and power of the kxb800 is much better IMO. Bottom line, much like the kxb500, only more of it. I mentioned in my other thread how this may be the DB751 slayer. For my tastes I prefer the sound of the uncolored tone of the kxb800. Very easy to dial in my sound, especially with the graphic EQ. It also weighs less than the DB751 and seems to have as good of build quality. And of course it cost a fraction of the DB751. Unless someone just prefers the Aguilar tone or needs an amp that will go to 2 ohms I can see nothing that the DB751 has on this amp. For an amp that has a street price of about $649, my opinion is that Kustom has another sleeper on their hands that bass players on any level need to take a serious look at. btw, a dealer has these brand new for $500 shipped on eBay.