I have an old Roland Super Cube 40 Bass amp that I got in a trade. It is a solid state, one 10" combo with a semi-parametric and bass and treble shelving filters. It is about 12.5" square and pretty lightweight. This amp seems to have potential. I patched it to an Eden D-115 and the head seemes fairly clean and toneful, but the internal speaker sounds fairly shot and beyond nasal as well! I think it is worthwhile to replace the 8 ohm internal speaker. The enclosure is an infinite baffle (no vents) and the internal volume is only about 1,035 cubic inches (without accounting for the volume taken up by the speaker itself). That's a pretty tiny enclosure (12"x11.5"x7.5")! What do you think I should look at for a replacement? I believe the output is 40 watts RMS, so handling capacity is not much of an issue. I am looking for a wide, fat bottom and as little distortion as possible. Any suggestions?