I used Free Traynor (Marslands) speakers from a PA cab (originally with a horn) to build a 2x12 Fender Pro Jr Total Monster combo amp built from a cut down 2x12 bassman cabinet from the 70's. It sounds great and all my friends with expensive tube combo's said I got it right tone wise. Maybe luck, deep cabinet, lotsa bass. Use em they are likely to sound good. Ever take many speakers apart? they are all quite similar more similar than different. Yes there can be major differences in sound but its all relative to taste and when you're cranked up with your favorite pedal it doesn't seem to matter. Its the player mostly that'll make it sound good. Give a drummer a pair of sticks and a cardboard box and you'll soon know if he/she is any good. Note that speakers from a ported cab may not work well in a closed cab or vica versa. Who really knows for sure here will likely speak up.