TB'ers, A guy at my work has an original 1964 Fender Blackface Showman amp head (no cab). It's not a "dual" showman head....just a regular showman. He says it has the AB763 circuit. I think it puts out 100 watts RMS. It is in excellent condition, and works perfectly with no issues. I know the guy as I have worked with him for years, so I trust him. I have been toying with the idea of buying the amp from him to use for bass. (I remember playing through a friend's Fender tube amp back in the 70's, and the tone was excellent.) The question is, what bass cab would be a good match with this Showman amp? That is where I seek input from my fellow TB bretheren. The back of the amp has two quarter inch speaker outputs: one labeled "speaker" and one labeled "external speaker", but it doesn't say what the impedance is. I presume 8 ohms?? (If any of you Fender amp experts happen to know the answer to that, please chime in.) But what I really seek by this post is input from TB'ers on what bass cab would be a good match for this amp. I have read that tube amps have much less damping factor than solid state amps, so I would presume that the cab would need to have drivers that are made to work well with a tube amp (can be vintage or something new). I look forward to receiving your input on cabs. Thanks!