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The third channel is missing gain and oomph (bass), channel 2+ has more on tap. My first guess was that it has something to do with the preamp tubes but these are fairly new and it also happens with other tubes. Is there something more I can test?

This might be a long shot because of me being from The Netherlands but I'm putting up my Diezel Herbert up for sale for €1600 which is about $1860. The reason for selling is that the Herbert is collecting dust at the moment and this amps deserves better. I'll throw the Columbus in for free...

A few months ago me and my band went to the studio to record two new songs for promotion purposes. Both songs (A Thousand Years of Dreams - Failsafe Protocol) can be downloaded for free from MySpace, Last.fm and Bandcamp. It probably isn't everybody's cup-o-tea but I would appreciate it if you...

Last Saturday I did a gig with my Herbert when it suddenly died on me. So after a while I discovered the main fuse was blown and replaced it with the spare one, which blew immediately after turning on the amp. Today during rehearsal I removed all of the powertubes, replaced the fuse and turned...

Since I retubed my Herbert I get this weird distorted hum on the clean channel. It occurs sometimes but at high volumes it scares the shit out of me when I switch to channel 1. :P I'm guessing it has something to do with faulty (power) tubes but I want a conformation from you guys before...

Yesterday we recorded some guitar parts for our drummer to practice at home, so I figured to post it over here too. The Herbert is fitted with SED Winged C KT88's and JJ ECC803S HIGH GAIN pre tubes and the cab is a FL412 G12K100 (German made). I used a Edirol FA-101 firewire interface and a...

Yesterday during band practice I discovered none of the loops (parallel, switchable and serial) are working anymore on all the three channels. First I thought it was the Xpression that didn't work but I ran some pedal effects through the loops but got no signal either... :( I noticed that two...