This is only amplifier mono PP 6V6 for phono, tuner, guitar with speaker /?/ 4 ohm, 8 inch in wooden box with 3 potentiometers and selector inputs. /RCA Victor SA-20/.
how big is the cabinet? Is it ported or sealed? that is all important to have a good response. It looks like a small cabinet, so i think without that info the best guess will be a fullrange that works in a small cabinet like the new Mark Audio CHN-110. But to really point to a good driver we need that info.
Ah, open back, then you need something with a higher Q to get some bass. An Visaton B200 or a a Tang Band W8-2145 would probally be some of the better options that does not cost a small fortune. I would tend to go for the B200. Just don't expect much bass from such a cabinet, they are not build for that and the original driver did not do that neighter.
Thread moved to Instruments and Amps.