I may jumping in a little late here, but I own the WTB400 and am considering the BX500.
My take on the Eden is that it's a clean, warm sounding amp. My issue with it is that I can't get enough highs out of it. My Ashdown MAG300 has screaming highs and is an aggressive sounding amp (exactly what I like), but it's noisy and has had some reliability issues, mostly with cold solder joints coming loose in the fan circuit and bridge rectifier. In retrospect, I probably should have gone with the next level up Ashdown, the ABM 500. But I got a deal and bought the Eden to replace the MAG as my main gigging amp, and I do use it for that. I've played the Eden thru an Eden D410XLT cab, a Peavey 2-10TVX and the MAG 2-10 cab that the Ashdown head came in. Sounds great thru the 410 Eden cab, but that's more cab than I normally need so I don't often get to use it like that. Currently, it resides in the Ashdown cab mainly for portability. It does sound nice, I just want more bite and crispness. I really need to crank the treble and adjust the semi-parametric to boost more highs, then bring the level on that up as well. I run the bass and mid a little past flat. It's a little better with active basses but still it's got less high end than I would like to have. Even with the highs cranked though, it's fairly quiet, not much hiss and way less than the MAG. It's got LOTS of bottom. The Enhance control is cool, but for the tone I want I don't use it much, maybe just up about 1/4 of the way.
These Eden black face WTB amps are different from the gold face WT amps, don't confuse them. The WTB's are FET amps, the WT's use tube preamp and are the "classic" Eden amp. The WTB's rose out of the Nemesis Line and have been discontinued.
Though the tone turned out to be not exactly what I wanted, I'm keeping the Eden for now, as it's the best built amp I've ever seen. Seriously, it's built like a tank, overbuilt even. I don't feel like I'll ever need to worry about reliability. I've opened it up, and the circuitry is immaculate and very robust looking. They call it military grade and I'll believe that. The adjustable level on the DI out is nice. The distortion is fair; I prefer a pedal. It will add a little bit of grind. Headphones jack is nice but there's no AUX in for practicing with CDs, iPod, etc.
So, it's really a nice amp, pretty hi-fi, quiet, warm and clean, decent EQ options with the Enhance, Semi-parametric EQ and standard bass/mid/treble controls. Just don't ask it for crisp ringing highs and you'll be fine.
For you BX500 owners, how does it handle when you push the high frequencies?
. The head came in yesterday and is a solid preformer. The distortion is alright, but coming from an Ampeg BA115HP this head sounds like heaven. Dialing in a nice tone is actually incredibly easy and the low end is really thick and heavy, for the price I paid it was a steal!
I bought it to replace the GK2001 which was also a great amp but a bit too heavy for us more seasoned bass players. The TFB550 that I had is now obsolete, being replaced currently by the TFB800. The TFB550 had more than enough power for any venue that I play anymore.
