Hi, I have been using an Ashdown MAG 300 for the last 7 years and am now thinking of updating my setup. I play fender Jazz bass and generally go for a 60's warm tone. I think i want to go for a combo with a 1 by 15 or a 2 by 10 Ive been looking at the new Ashdown 'Dual Tube Preamp' series, any one played one? Any other suggestions? Ampeg?