dear all, Question A: Speaker A : 60Hz to 20kHz. Speaker B: 40Hz to 20kHz. what can i hear from speaker B but not in speaker A? i notice high end speakers can goes down on low frequency..... Question B: Speaker A: 85dB Speaker B: 91dB what can i hear from speaker B but not in speaker A? Question C: Bi-amping and bi-wire means wat? notice some crossover can do this.....explain in detail to me pls? thanks. desmond.