Well, I got bored tonight so I took apart my practice amp. Everything. I'll start by saying that I love this little amp . It's a sealed box and is surprisingly warm sounding. These are the things that could be improved: *The speaker surround is part of the speaker and is very stiff. A looser surround would give me better bass response *I'm not getting enough treble out of the amp. I know it is capable because I have used it with an external cabinet. * There is no insulation. How would adding some improve the sound of the cabinet portion? That said, does anyone know of a good 8" coaxial speaker that is relatively cheap? I couldn't find any 8" car audio speakers... Thanks.