Hughes & Kettner Quantum QT-600 2007

Very, very, very, very hard to find
Less than 100 out there
Only a few made it to the US, 5 years ago
Tube
600 watts
I believe list was $3400
Was a NAMM demo unit
and never had a gigging life
Stayed in storage most of its life
but has a few scuff marks

Manual:

This is one thing that you don't really hear about in the bass world is the Hughes and Kettner line of bass amps and cabinets. You hear all day long about the guitar stuff and many people successfully use their equipment on an on going basis around the world. Their bass stuff is just killer and it is a shame that they don't put much focus on getting that name out there. I know the company like Ashdown, Ampeg, GK, and Eden dominate the market when it comes to bass rigs but this stuff is quite excellent. Utilization  Power 600 Watts
Poweramp Dynavalve
Preamp TubeTouch
Effects Loop serial
Footswitch/Stageboard FS-2 included
Switching Functions FX-Loop, Punch
Special Features Pre/Post EQ switch, Bass Shape & Mid Boost
Headphones Yes
Line Out balanced
Compressor Tube Growl
Equalizer 4-Band parallel
Tubes 1x 12AX7
Speaker Outputs 1x Speakon, switchable to 8/5, 3/4/2, 8 Ohms
Suggested Speaker Cabinet QS-Series
Dimensions 550 x 195 x 320 mm
Weight 14 kg/31 lbs Sounds  What I really like about the Hughes and Kettner stuff when it comes to bass is the growl control knobs on these thing. I love when you can get a little gritty on the bass and not so clean. You need to give it a little growl and little girth. Dirty the thing up a bit and that is what I love about these guys and their bass amps.

If there is one thing that I can't get enough of when it comes to bass is the dirt and the compression. Ashdown features this on many of their amps and heads. This is one of the things that has made them one of the best companies to go to for getting your bass tone done right. Hughes and Kettner is another one that just does is right!