Some people find the distortion too rough sounding, even and low drive settings, and want a smoother, cleaner sound. In a lower gain tubes as 12AU7, 12AX7, 12AT7Ĭhanging tubes is the simplest and most effective mod for a Tube Driver pedal. Genz Benz bought Tube Works during the late 1990s and shipped production to Taiwan with different knobs and graphics.Ĭhanging Tubes - Cool tones can be made by subbing A small number of those were made with gold colored tops and blue cosmetic label printing. Early production was made in the USA throughout the late 1980s and 1990s. The primary difference from the 901 circuit are a few different resistor values in the drive section and a smaller Hi pot value. The RT-903 has the same PCB as the RT-901 Real Tube peda. Published information: 'RT-903 Blue Tube * Real Tube Enhancer (Tube Works) 5 knobs, blue with yellow graphics began production during 1987 as a smoother, lower gain version of the RT-901 Real Tube Overdrive pedal. MIA ~ Made In America, USA No glue, Velcro, tape or gummy mess ~ nice and clean. Difficult to notice anything but light minor wear. Direct electrical cord to wall in great shape. RT-903 BK Butler in excellent cosmetic condition. The Power Supply has the following info: 'UL-781108' and 'AD-9603. The Drive pot has 'A600k' on it's backside. Important NOTE: After a first opening of this pedal for photos, I have the following information: Four of the Five potentiometer have 'A600k' listed on their backside. Incredible blues overdrive distortion pedal MADE in the USA!!! (later versions from Taiwan) always good in getting better distortion ratings.BK Butler RT-903 Blue Tube Enhancer Real Tube and Tube Works Product 12AX7 Tube Guitar Stompbox Pedal if you only need small wattage, well get alittle more and turn it down. im just saying there are better VALUE amps out there, with better wattage ratings. not to mention all the vibration in the trunk, from subs if you have them. in my opinion, they are just not worth the extra money.

im not saying those tube amps arent worth the money.

or a JL 500/1 amp(it is DEFFINATELY 500 WATTS,and it has very little distortion for a class D amp), and picking the legacy 500. thats like looking for a 500 watt amp, and having a choice between Legacy 500 amp(if it were 500 watts it would have big distortion).

there are better quality car amps out there with better wattage, sq, and distortion ratings with much lower prices out there. Posted on Saturday, Ma03:28 GMT WHATS WITH THESE TUBE AMPS.

Bk butler tube works blue tube