Are there any manufacturers that make a model of bass head with the following features: Hybrid - Tube pre and ss power 2 channels that are blendable and footswitchable At least 450W per side at 4 ohms or more in output - conservatively rated. Obviously a lot more in mono bridged mode if it has that capability Minimum impedence of 2 ohm Good eq for both channels independently, but I would almost settle for simple treble, mid, bass all together at this point Passive and Active inputs or a pad to switch preamp out or slave out to send to external power amp No more than 26 lbs in weight, but hopefully lighter Rackmountable XLR output for recording Tuner out Toroid / toroidal transformer design/technology Bi-ampble would be nice, but not necessary Models that Im currently considering include: Genz Benz GBE 600, several Eden heads, Fender 1200 pro/Sunn 1200s. Mesa? Weight issue. Im really leaning toward the Genz Benz GBE 600 or the new Eden WT1205 or a WT 800, 600, or 550. Any info on the Genz vs. the Eden heads would be appreciated: headroom, bi-amped vs. straight mode, thoughts on tone, etc. I have noticed that I dont particularly care for Edens when they are not in bi-amped mode, but maybe Im doing something wrong I would be curious as to others thoughts on this. Im wondering if that also means I wouldnt like the tone when ran mono-bridged (I havent tried that with the Eden yet). If I understand it correctly, the Eden has either one or two tube pres (model dependent) and two power amp sections (stereo), while the Genz has two preamp sections (tube and fet) and one power amp section and Im wondering what effect the design of each has on tone. Models Ive pretty much rule out, but am still on the fence on: Mesa M2000 Basis Epifani (not tube) please correct me if Im wrong Walter Woods (not tube) please correct me if Im wrong. Also, no local dealer, never heard in person, would love info though. Thunderfunk (not tube) - no local dealer, never heard in person, would love info though. Aguilar DB 750 (weight) and AG 500 (not tube) Gallien Krueger (not tube) Ampeg (just not what Im looking for) Fender Pro 800 I would also entertain ideas on a good pre-amp/power-amp set up., but I really wanted an all-in-one for medium size gigs where I wouldn't need the external power amp all the time, but the capability was there if I wanted to add it for a larger or outdoor show. Thanks in advance for your input.