The eight hundred watt XS800H makes its debut as the highest-powered tube hybrid bass head in the BassMaster line. It features 800w at 4ohms and a host of features for the demanding bassist.
Switchable tube/solid state (FET) input and tube overdrive (12AX7A preamp tube)
Footswitchable Tube Overdrive and Effects Loop
Innovative Wet/Dry blend on Tube Overdrive
Wet/Dry blend on the effects loop return
Five band EQ featuring a semi-parametric sweepable mid
Unique "Variable Contour" scoop function
Bass Resonance control adjusts the damping factor for either a 'loose' or 'tight' low end bass response
12 LED highly visible signal meter allows for monitoring of output levels from across the stage
Pre/Post EQ selectable XLR balanced Tube DI output
Speakon™ and 1/4" extension cabinet outputs
Front panel mute switch for silent tuning with 1/4" tuner out jack
Switchable Limiter at the output stage
I've just come across this from their website. Any clue as to the price or when this will be available? I'll search their site again, but I didn't notice this information.
The bass head sells for $879 retail. The YBA-200, also worthy of looking at for the tube freak, is selling at $829. Poor Boogie and their "Big Block"! Yorkville stuff just kills for the money and has for decades been extremely reliable. The XS-400H actually weighs more than its big brother!
Now if we really want to start a fight, we can state truly that the SVT is a rip of the Traynor YBA-3A.......
The bass head sells for $879 retail. The YBA-200, also worthy of looking at for the tube freak, is selling at $829. 
Poor Boogie and their "Big Block"! Yorkville stuff just kills for the money and has for decades been extremely reliable. The XS-400H actually weighs more than its big brother!
