B15 speaker help

Hello all, I just got this new Ampeg B15-NC. It sounds fantastic at low volumes, but when turned up a bit the speakers seem to be giving out and distorting(It's not the amp). Do you think I should keep the original speakers as is and use it just for recording in the studio, or should I get the speakers reconed, or should I drop new speakers in (if so which speakers)? will reconing hurt the value? I've got plenty of ampeg gear but I'm new the the B15 game. Any and all suggestions are welcome. Thank you kind TBers in advance!
-Harrison

 

Thats a great suggestion. I'll see if he chimes in soon, if not I'll go ahead and shoot him a PM. Thanks for the help thus far. I value all of your input as I want to do right by the amp and keep it as original as I can.

 

@coreyfyfe yes it is both speakers that distort at the same time.
@beans-on-toast I have tried the amp with other cabs and it doesn't seem to be the problem. I haven't thought of or ruled out the other potential problems you mentioned. It does sound very similar to blown speakers I have had in the past though. I'll try to test the speakers like you suggested though. Thank you both for the speaker recommendations. Perhaps I'll drop new speakers in and keep the originals on the side.

 

I took a picture of one of the speakers. Usually when I've had blown speakers you can see the cracks in the cone, but this cone looks perfect to me. Is it possible to have a blown speaker but not show visible signs? Maybe something is loose and needs to be tightened. Is it safe to play the speaker without the top on? It wouldn't be sealed anymore. I would just like to see if the speaker is blown or if it's a different problem.

 

Ok scratch my last post... I went ahead and tested out the speaker alone and it's definitely blown. The cab seems solid. Now the only question left is recone or new speakers. The delta 15s sounds like a great idea for new speakers but unfortunately they come in at 8ohms each and I need a total load of 8ohms so those don't work. Any other 16ohm speaker that's a good replacement?

 

Ok that sounds like the move. Is the Eminence Delta - 15B 15" driver 16ohm speaker the same as the eminence delta 15 8ohm speaker? Just different ohms?

 

You answered my question before I could even get it out lol. Thank you guys so much for your help I really do appreciate it.

 

Perfect! I am correct that I need 2 16ohm speakers though right?

 

Update: I did infact drop in the deltas and the same problem persisted, then got the adapter to plug the amp into my 810 and still had the same problem. Once the volume got the point where the power tubes were really pushed, it made a bad sound, not like the beautiful tube breakup that usually happens. Got the amp services by Andy at revamp in LA and still had the same problem. I'm at a loss as to what to do, but I'm very happy with the sound of the amp at lower to medium volume, which is more than enough for most of my applications. If I need something with some distortion, a B15 probably wouldn't be my first choice anyway.