Why do you guys pursue a flat frequency response when you buy a subwoofer?


As we all know, most audiophiles spend a fortune for that flat frequency response displayed on the manufacturer's specs when you buy a subwoofer. Why do you do this? The minute you put that flat sub in your room and take some measurements, it is anything but flat (it's a rollercoaster with all kinds of peaks/nulls etc, EQ to the rescue).....So, why do you dudes continue to look for the flat line? What's going on in your mind when you're shopping around?
deep_333
@m-db  yes that is Terra Mar :-) red tide going.... on top of reopening...
On the subject subs. Too much over thinking I have 4 15 inch woofers in my 4 way speakers total of 60 inches of woof, you can feel your rib cage vibrate at just the right volume problem solved enough said have a nice evening.
I gave this bit of thought on the airplane trip today - IF ya get Soular Energy sounding “ right “
then everything else is recording variability...

OP I sent you a PM offering help gratis but I see you have taken many many steps to better sound...


@audiokinesis --

Deep: "I sure would not want to add another adc/dac into the chain with a subpar DAC on something like miniDSP for bass management (when i have a Denafrips DAC in my 2 channel setup). Guys i know have waaaay more expensive speakers, DACs, monoblocks, etc on their 2 channel music setups than i do. They are probably not gonna do that either. "


You bring up an excellent point: How do we roll off the bottom end of the mains without any undesirable side effects? Not sure there is a totally transparent solution.

Unless your speaker platform is all-active to begin with, in which case (expectedly quality) digital filtering is already a vital part of the configuration - sans passive cross-over parts that would otherwise be regarded the bottleneck. There are pro vendor, excellent digital cross-overs out there that doesn't cost a fortune, like the ones from Xilica, but even with passively configured main speakers - the primary focus in this context, it would seem - I find they're nigh on fully transparent being implemented into the chain. I'm stressing 'nigh on' despite my not being able to detect a sonic degradation with a Xilica unit put into the signal chain that ends with passive speakers (based on my experience with my previous, passive speaker set-up), because I wouldn't want to presume its total transparency in more academic or theoretical terms.

Forest for the trees, as they say; with passive speakers in mind, what does the outcome of putting a quality digital cross-over/DSP into the signal chain potentially bring with it advantageously, high-passing the main speakers instead of letting them run full-range, compared to the (mostly theorized?) audible influence the added component itself will have? That's certainly up to debate, but I find high-passing passive main speakers with a quality digital DSP for subs augmentation to be worthwhile, and with an all-active configuration like I'm using now it's a naturally integrated option. High-passing mains to me is all about relieving them and the amp(s) driving them, rather that protection per se. 
@tomic601 , here are some tracks i use when i'm tinkering with it and listening for things (non compressed FLAC versions of these, 24bit 96khz when possible). Overall SPL levels are relatively high (farmhouse/no neighbors).

Hans Zimmer - Mombasa
https://www.youtube.com/watch?v=CPgPxGX6nNo

Rom Di Prisco - Caverns of  Suursonnabu
https://www.youtube.com/watch?v=EqKyS8WES7Y

Jesper Kyd - Approaching Target 3 
 about 2.35 onwards
https://www.youtube.com/watch?v=NipZFlauZ8E

Yaeji - After that
https://www.youtube.com/watch?v=tAtkZ9iVEwc 

Strappin young lad - love
https://www.youtube.com/watch?v=mL9Aohgd79I

John Peasano - First Contact Protocol
 https://www.youtube.com/watch?v=ZJO6i2b5pH8