I'd like build a Cornscala with APT150 supertweeter and Atlas PD5 VH mid driver on the Altec 511b midhorn for my home built SE 2a3 monoblocks (I don't like loud music...:), enough about 100 dB/1W speaker ). The problem is the woofer. I find this speaker: Eminence Kappa-15LFA. 8 ohm. Parameters...