Found mine in its' like new box at a yard sale in Luling Tx last fall while visiting parents. Paid 5 bucks for it, more as a novelty as I did not have a bass or other to run thru it...just thought it was cute. 
But once back home, I put in batts, plugged in one of my 5 stringers and it surprised me how well it sounded. Not great at all thru the lil speaker. But the way I've used it a couple times was with good headphones or even earbuds. It works for running thru a tune or two at sit in gigs just to refresh myself of the tunes' bassline right before the gig.
I rarely use the built in speaker as it distorts too easily but sometimes at home in a pinch I'll use it and I can use at least 4 of the 5 strings clearly enough.

But once back home, I put in batts, plugged in one of my 5 stringers and it surprised me how well it sounded. Not great at all thru the lil speaker. But the way I've used it a couple times was with good headphones or even earbuds. It works for running thru a tune or two at sit in gigs just to refresh myself of the tunes' bassline right before the gig.
I rarely use the built in speaker as it distorts too easily but sometimes at home in a pinch I'll use it and I can use at least 4 of the 5 strings clearly enough.
