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Hi, Edit. I investigated the problem more, and edited this first post: I have a Rev. G Dual Rectifier. On 3 of the 5 modes, volume and sound is lacking. Here are sound samples. These are all recorded with identical settings on front panel pots, loop not engaged: Master, presence, bass & mid -...

Hi, I thought I'd ask here before taking my amp checked by my dealer. When I switch standby to on, the power tubes give blue/purple flash. If the 45w setting with the current channel is selected, only the middle pair of tubes flash. With 90 watts, both pairs flash and with 10w engaged, the two...

Hi, I'm new with Mesa's tubes, I tried forum search but I'd be glad if I got a clear answer to this matter. My Mark V has four green 6L6 tubes. I have to replace the center pair of tubes, but my local dealer doesn't have tubes with green color code right now in stock. Is it ok to use yellow...

Hi, I've never opened a Boogie amp, and just learned by first hand experience why many people whine about this matter. :) So, is there any fast way to get clear access to V1 preamp tube? Even though I'd remowe all power tubes, there's still a transformer in my way so that changing the tube is...