For some time now, based on info I've read and on input from guys like bear123
), I've been increasingly-seriously contemplating replacing my two Chase SS-18.1s (SS-18s) with dual PSA XV15se's (XV15s). Everything about the XV15s indicates that they're kick-@ss subs, and given that I have a fairly large room (a little over 3,400 cu.ft.), ported subs should work better than sealed.
But there are a couple of things I'm still not clear on and I hope to get some clarification.
In my room, my old PB12-NSD - which was rated to 18Hz @ -3dB - rolled off pretty hard at ~17-18Hz and my current SS-18s (with PEQ applied to boost the bottom end) roll off pretty hard at ~17Hz. IOW, I don't think I have any room gain at all. (I sometimes think I have "room suck-out" below ~17Hz.)
The XV15s are rated to 21Hz @ -3dB and the advertised 15-18Hz in-room extension is premised on room gain...which, it seems to me, I don't have.Questions:
- Given the 21Hz rating of the XV15s and the fact that I have no room gain, can I realistically expect useful sub-20Hz performance from the XV15s in my space?
- If 'yes', would it realistically be any better at ~17Hz than what I'm already getting from my SS-18s?
- Or, to put it another way, how much louder (in dB) would it have to be at 17Hz to make it worth the upgrade?
The recent data-bass.com testing of the SS-18 seems to indicate that it outperforms the previous-gen XV15 (which, according to Tom V., was not that much different from the current version) on a number of fronts:
- Max Burst: The SS-18 surpasses the XV15 from 40Hz and up, and at 20Hz is only 4dB down.
- Basic Response and Full Range Response: The SS-18 surpasses the XV15 at every point on both FR curves.
- Maximum Long Term Output: The SS-18 beats the XV15 down to ~25Hz, after which the FR curves are intertwined.
IOW, I'm not seeing the advantage of the XV15.
(NOTE: In case it makes any difference, I never listen at reference. Regular listening is at -18 to -16dB; bumped to around -14dB for quieter movies; and to around -10dB for demos.)Questions:
- What am I missing here?
- Am I not reading the graphs correctly?
- What other factors do I need to take into consideration?
Thanks for your input.