Hi whiz, i told u not to use the amp at full output...
when testing the sound of a speaker u must test the on-axis response as well as the off-axis response. Room acoustics play an important role so u must also find a good position. First listen them staying in their center at about 1 m and note ur impresions. Then move left or right, therefore changing the angle to about 60degrees from the center and note the impresion. The sound shouldnt change much in color.
So lets look back a little: When u connected the zobel and the tw had 8 resistor the speakers had a loss in mids. when u connected the zobel and the tw had 2.2 resistor u havent noticed a change. Correct?
The egalisation of the woofer's impedance for that xover is achieved when the sound between drivers is as balanced as posible.
The next thing u should try if ur willing to continue is to change the woofers zobel resistor to 4.7. Leave the tw's 2.2 for its necesary for the higher SPL.
Using the 4.7 ohms should lower the woofers xo point so mb a better match can be achieved.