Sweet old solid Crate bass taxi with 2 Peavey Black Widow 15" speakers.
Black Widows (design:1504) = 15", 4 ohms, 700 watts each
That makes the taxicab either a 2 ohm or 8 ohm taxi with 1400 watts !!! That's super loud. Plus the speakers are made from Kevlar and are generally unbreakable.
Photos show the original speakers however I will certainly set up the black widows depending on if you desire 2 ohms or 8 ohms.