I have to say out of the 3 Champs, 5F1 (Clapton) 76 VC and drip edge 68 VC with original Jensen alnico the original was the best. Not most resistant to farting or distortion but most pleasant sound. But the two Sigs were very good and close overall. Straight cone alnico spikier with breakup. Ribbed ceramic smoother with a little more headroom. Expecting 12" levels of bass or even 10" levels you are going to be disappointed. But - it's a 5 watt amp. If used within context as a loungeroom moderate volume amp with natural moderate tube clean to overdrrive it is more than fine. Maybe not if you're running lots of boost and distortion or diming everything it's farty. Then - maybe it's not the amp for you? This is never going to be a gigging amp unless you mic it (which I have and it works great - sounds like a big amp).