martykl, appreciate your contribution and i think everyone benefits from it--too many people turn up their noses at subs, incorrectly. i can see your points and find truth in them in certain applications while not changing my mind (though mine are also incorrect in select applications too).
agreed that the port does do as you describe, but the quick rolloff in turn supports mine. 6 of one, 1/2 dozen of the other. a port is a bass bump at a given freq, and the room contributes enough of those without adding more via the port. and yes, some ported subs can sound great (wilson) without the huffing, i'm just offering a 'more likely to succeed' path, and a cheaper ported sub is less likely to succeed than a sealed sub for the same $. (further, if your mains have ports but your subs don't, you will need a darn good bass-optimization feature as you need it to address both room nodes and main-generated port nodes---the JLs ARO feature will not do this, FWIW).
if you have a preamp that can filter HP v LP or accommodate temporal shifts by delaying signal to mains / sub, great (as you describe) and its likely a benefit vs alt setups. but, if you have a pre like mine (ARC Ref 5se) and most other uber products which have no such features, you're not going to dump a great pre to move backwards to a good one in order to gain the features; furthermore, the notion of adding an outboard x-over (or using the half-assed one in the sub) is going to compromise the mids / highs---bad parts, bad results. one earlier poster mentioned his einstein preamp (great pre btw, spartan in its features), and folks w/ products like that are quite particular to transparency loss. running their mains full range and integrating a sub as i advocate is the likely best choice.
(of course, using an x-over and its resultant loss in transparency may be offset by the opp to switch amps to a lowered power, better sounding choice that doesn't have to contend w/ sub-80hz bass. YMMV).
room correction above 80hz is an entirely separate matter for room acoustics, not subwoofer bass management IMO. both are required in high end systems. (well, addressing room acoustics is ALWAYS required).
if nothing else, i hope folks realize that if their first sub integration doesn't work, think about what factors you've yet to try, as it can work exceptionally well if done right...i offered my original post as a most-likely-to-succeed route, but not the only route possible.
agreed that the port does do as you describe, but the quick rolloff in turn supports mine. 6 of one, 1/2 dozen of the other. a port is a bass bump at a given freq, and the room contributes enough of those without adding more via the port. and yes, some ported subs can sound great (wilson) without the huffing, i'm just offering a 'more likely to succeed' path, and a cheaper ported sub is less likely to succeed than a sealed sub for the same $. (further, if your mains have ports but your subs don't, you will need a darn good bass-optimization feature as you need it to address both room nodes and main-generated port nodes---the JLs ARO feature will not do this, FWIW).
if you have a preamp that can filter HP v LP or accommodate temporal shifts by delaying signal to mains / sub, great (as you describe) and its likely a benefit vs alt setups. but, if you have a pre like mine (ARC Ref 5se) and most other uber products which have no such features, you're not going to dump a great pre to move backwards to a good one in order to gain the features; furthermore, the notion of adding an outboard x-over (or using the half-assed one in the sub) is going to compromise the mids / highs---bad parts, bad results. one earlier poster mentioned his einstein preamp (great pre btw, spartan in its features), and folks w/ products like that are quite particular to transparency loss. running their mains full range and integrating a sub as i advocate is the likely best choice.
(of course, using an x-over and its resultant loss in transparency may be offset by the opp to switch amps to a lowered power, better sounding choice that doesn't have to contend w/ sub-80hz bass. YMMV).
room correction above 80hz is an entirely separate matter for room acoustics, not subwoofer bass management IMO. both are required in high end systems. (well, addressing room acoustics is ALWAYS required).
if nothing else, i hope folks realize that if their first sub integration doesn't work, think about what factors you've yet to try, as it can work exceptionally well if done right...i offered my original post as a most-likely-to-succeed route, but not the only route possible.