I have a used head that is rated at 250 watts into 4 ohms. the amp itself is in near mint condition otherwise... looks fantastic. the Knobs crackle a little. I ran it into an in-sensitive 4 ohm cab, and i had to turn the post gain up to 10 and the pregain up to 7 in order for it to be head at TV/radio volumes. I turned both up to 9 and it still wasnt what i consider acceptable for even a low volume band practice. (fyi- i run under 110db at 99% of our normal practices.) I would not be surprised if someone told me it was a 15 watt bass head. But it's not supposed to be!!!!!!! the tone, however, was EXCELLENT. I instead ran it into a very sensitive 8 ohm cab. not much better. a little, but not much. lest you ask- my bass, cables, battery, and speakers are not the issue. A new head sitting nearby bore that out. I opened her up, and i didnt see any loose connections. It is solid state. Could something go wrong where an amp loses it's OOOOMPH but still retains its sound quality? My previous head was exactly the same wattage, and completely BLEW this away volume wise. BLEW it away. any help , advice , or insight is appreciated.