I've been using a DSPeaker Antimode 2.0 for several months. It really made a positive difference taming the bass coming from a pair of B&W Matrix 801 S2s in a 15' x 15' (bad, I know) square room.
Did a correction up to around 300Hz.
Tried the DSPeaker in my office setup: Harbeth SHL5+40s and four subwoofers.
Tried several different correction ranges.
What I learned from the office setup is that although there was a noticeable improvement in bass control, the DSPeaker actually was making up for my poor placement of two of the subwoofers.
After an afternoon moving around the subs (two of them are mounted up high about a foot away from the ceiling), I noticed less of a correction offered up by the DSPeaker.
A/B testing still showed a difference if I listen closely but I am challenging myself to achieve as flat a curve as I can with some more subwoofer placement adjustments.
I also just tried the DSPeaker with a pair of old 15 ohm Rogers LS3/5As from the '70s. No subs. Not much difference with these in A/B testing. Probably because they don't (can't) produce low bass frequencies with enough power to sound boomy in the first place.
But good luck in your search! Definitely was (and still is) worth it for me!
Did a correction up to around 300Hz.
Tried the DSPeaker in my office setup: Harbeth SHL5+40s and four subwoofers.
Tried several different correction ranges.
What I learned from the office setup is that although there was a noticeable improvement in bass control, the DSPeaker actually was making up for my poor placement of two of the subwoofers.
After an afternoon moving around the subs (two of them are mounted up high about a foot away from the ceiling), I noticed less of a correction offered up by the DSPeaker.
A/B testing still showed a difference if I listen closely but I am challenging myself to achieve as flat a curve as I can with some more subwoofer placement adjustments.
I also just tried the DSPeaker with a pair of old 15 ohm Rogers LS3/5As from the '70s. No subs. Not much difference with these in A/B testing. Probably because they don't (can't) produce low bass frequencies with enough power to sound boomy in the first place.
But good luck in your search! Definitely was (and still is) worth it for me!