Wayne:
Thanks for your reply. What type of measurement is needed?
I'm not sure if this additional info is useful.
I'm using the DCX2496 active crossover, crossover type is L-R12 for both ways, crossing at 1kHz, also tried crossing at 1.6kHz & 2kHz.
I'm using 1.5w tube amp for the high freq & 300b tube amp for powering the 4pcs Delta 15A.
I'm sorry to have to ask you, what can cause the midrange driver to breakup?
Is the freq crossing too high, i guess the crossover type & which order does affect the sound, is it? Any advice?
Thanks.