2 diff thoughts on X-over. 2 channel & Long!

[KingRT]

1) The cleanest possible sound will be achieved by running your signal through the fewest components possible. Each new piece of equipment, amplification stage, eq, A/D>D/A, cable etc. has the opportunity to help in some way, but will also add noise and reduce the purity of the original signal. Despite what some say, if your speakers and amplification are good enough, you can hear it! In this particular case, you'd be inserting a mediocre piece of equipment into the connection between your high quality electronics and speakers. Keep in mind your signal can only be as good as the weakest link in the chain. In fact it is usually worse than the weakest link caused by compounding weaknesses in cable connections, introduced noise etc.
Plus this would be redundant control over the crossover. Your signal is already going through a crossover in your sub. This would be duplication and would cut off the low end of your SF's. I never understand why someone would want to spend that much money on speakers, then think they know better than the manufacturer and insert crossovers to change the speaker. That is essentially what you would be doing, changing the entire design of the speaker's sound. The cabinet, drivers and crossover work in synchronicity. Change one and you change the sound of the speaker. The manufacturer did that design for you and you chose that speaker because you liked it. You shouldn't change it. (My caveat to this is if you were running HT, but you said this is music only.)


2) 80HZ might not be best for your room but it is probably not the worst either and would be a safe bet. If you can get more I'd try 90 and 100. 60 I feel is straining your speakers, remember a crossover is not a cutoff and 60hz crossover would still let some 30hz signal through to your speakers. Also, 60hz rarely is the best crossover for most rooms unless the room is VERY large
Any helpful thoughts on these 2 statements?

Sumiko (FS) says go low.
JL says go high.
Both reputable! I would like to save the $'s, but do it right the first time.