recently inherited a large 1x15 "bullfrog" cab with a blown alumapro 15. I doubt the speaker is worth a recone..makes a nice looking ashtray though...so I been thinking about replacing it. The cab is on the large side (internally 25x24x16 not including the large slot port that runs the width of the bottom). I have been able to look up the specs on the alumapro 15 http://tinyurl.com/bb87dr6 and I am assuming (though this might be wrong...) that the cabs were built to match the speakers spec. Based on the internal volume and alumapro spec, can anyone recommend a 15 that would work in this cab? it would be used more as a sub rather than a stand alone, 4 string bass.