I have an early Peavey-era Trace Elliot 1210 combo. Details here. I recently got a used Mesa PH1000 cab that is just amazing sounding to me. Details here. I removed the TE amp section from the cab to power the Mesa. The 600-watt TE head really shines through the Mesa. As you can imagine, though, the setup is not terribly portable due to bulk and weight. My idea was to emulate this home setup as a more portable live rig. The first step was to get the preamp dialed in. I favor a barely-overdriven tone, one with tube warmth that makes the overtones and harmonics stand out but without aggressive break-up/distortion. I was hoping the TE Transit B pre-amp pedal might closely emulate the AH600 preamp's sound. I know that electronic distortion is not the same as tubes and that the Transit B lacked a 12 band EQ (which I barely use, anyway), but I thought the dual-band compressor featured on the pedal might give me some of the same sound shaping ability that the dual-band compressor on the AH600 did. And anyway, wouldn't Peavey try to emulate the "Trace sound" as closely as possible since it's their own brand now? The pedal arrived and I put it through the paces for two weeks, setting the amp totally flat with no tube drive to let the pedal do the talking. To make a long story short, I returned the Transit B. It is not a good substitute to my ears for the tube-preamp AH600. The overdrive is crunchy and brittle and fizzy which are three words I wouldn't use to describe the tube overdrive sound. In the past, I also purchased a Darkglass B7K Ultra and couldn't get the kind of sound I was looking for that matched my amp. So, next step is to continue investigating preamp pedals, preferably tube-driven. Besides the Two Notes Le Bass, I'm not aware of any worthy candidates. Oh, well... the tone quest goes on. Suggestions welcome.