A good friend of mine loaned me this amp. It's a head and I have the 1X12 cab. I've used it a few times but man... I just can't seem to wrap my heart around it. It's hard to describe but I'll use the word "cold" sounding to me for an all-tube amp. The notes don't sustain well an just doesn't have much character. Strange for an American built amp that's relatively pricey. I'm thinking it needs re-biasing? Maybe different tubes? To compare, I have a Marshall SV20 (beautiful and full of character), a Marshall JVM205 (same), a Vox AC15 (def more character than the Mesa), and an Orange Tiny Terror (kick ass little amp). So I know what I'd "like" to hear from a tube amp like this. Any suggestions welcome.