Has anyone had a similar problem with this head? The cab is an Eden D-410XLT (4 ohm), so theoretically this should be a 450 watt rig. I have trouble getting enough volume with a passive bass. I crank the master all the way and have the input gain at about 3/4 - so there's some unwanted clipping. I've experimented with tone and eq settings but it doesn't help much. My band isn't super loud, so I don't think that's the problem. I suspect this head is either underpowered or has a problem. Aside from the lack of volume, I like the tone of the amp so I'd prefer not to replace it. Any ideas?