Marshall 9005 Monoblock Shuguang EL34-B
I have used all the popular brands of tubes over the years, some seem to sound better in specific amps. The Marshall 9005 Monoblock Power Amp originally came with Sovtek EL34G tubes. These Amps were noted to have bias supply problems. Biased hot at 47ma as well. Once sorted these Amps are Ultra Reliable and will run 4 4/12 cabinets. I recently tried a set of Shuguang EL34B tubes and I would have to say sonicly it now sounds better than my later gold face 50/50 monoblock. Sounds like it has a boost pedal in front of it. Cleans are amazing and is a gain monster. Amp used to have a pronounced amount of hum with and is now almost dead silent. Wished I had tried these tubes a lot sooner.