I just purchased a used Peavey TNT 115 bass combo for $100. The 15 inch speaker in the combo would not produce any sound, while the tweeter worked just fine. I pulled the unit apart and checked the 15 inch driver, first with a 9 volt battery, then with an ohm meter. The speaker made no sound and did not budge using the 9 volt battery. Testing across the speaker leads, the ohm meter showed the circuit to be open. Would this be indicative of a blown or damaged speaker? I'm not much of a speaker tech, more of a straight electronics guy, so I want to be sure I've properly diagnosed the problem to be a bad speaker. The amplifier itself tests out just fine. So, if the problem is indeed the speaker, any recommendations on replacement speakers? Peavey has the direct replacement, 1502-8 BW, for $149.99, or you can replace the speaker basket for $81.99. Any thoughts on these options would be greatly appreciated as well. Thanks Guys!