The 500W Gallien-Krueger MB Fusion tube preamp incorporates the same all-tube preamp of the GK Fusion 550 and maintains the amazing portability of the MB2-500. The ultra-light bass amp delivers 500W at 4 ohms, 350W at 8 ohms, and is equipped with an all-tube, 3x12AX7 preamp. The GK MB Fusion bass head also has a 4-band active EQ, variable contour with mid frequency select, and Deep and Bright switches, so you've got total tonal control.
* 500 watts @ 4 ohms, 350 watts @ 8 ohms
* All tube preamp (Three 12AX7s)
* 4-band Active EQ
* Variable contour with mid frequency select
* Deep and Bright switch
* Mute switch
* Active/passive switch (-14dB)
* Effects loop
* Tuner out
* XLR out with pre/post EQ and ground light
* 2 Speakon outputs
* 4 lb.
- why did I wait? Review by Fredrick V.
Value Quality Features
The tone is nice and warm from the tube preamp section, but it has the punch and fast attack of a ss amp. The tone is pure GK.
The foot-switch is a nice feature, allowing you to quickly go between the 2 channels for leads or whatever.
All in all a very well thought out amp that is lightweight, portable (fits in my backpack) and sounds great. I wish I hadn't waited so long to pick up an ultralite. (Posted on 6/21/2012)