I am not even going to try and guess on a timeline, too many subs must have scrambled my brains
Here is a list of subwoofers I have owned:
Klipsch SW-12 II (pretty sure this was my first HT subwoofer bought used)
HSU TN-1225 (pair)
NHT SubTwo pair
NHT 12" sealed sub (forgot the model)
NHT dual opposed 12" sub pair (I think W1)
NHT Evolution U2 sealed 12" sub pair
Dual Bag End Infrasub 18
Triad Platinum 18
Chiro C-150 THX sub
M&K THX sub (forgot the model)
Kinergetics research THX sub
HSU 12" there first flagship
SVS CS-Ultra Pair
Sunfire True sub reference pair
Definitive Tech Supercube reference
Revel Ultima Sub-15
JL Audio F113
Earthquake Supernova 12" and 15"
I know I am forgetting other subs but yeah, I have had a few
I really only had so many as I knew someone who had a retail store and they would sell me there demo's and over stock cheap. Most of the contracts they had would not allow for online sales so they had a work around, me
Then I got into DIY and all hell broke loose
First was just a Kove Audio sub I picked up from Parts Express on close out. Really a car audio sub but in a sealed enclosure with a Crown audio K2 and Velodyne SMS-1 for EQ it really slammed for movies, I replaced my JL Audio F113 with it but admit that it lacked the SQ for music.
I then learned about TC Sounds and ordered a pair of TC3000 (now known as the Axis) 15" subs and built new enclosures. Cleaner sounding then the Kove subs and hit harder but lacked some mi-bass punch.
From there I have had the TC Sounds TC2000 in both the 15" and 12", Audiopulse Axis 12" pair and LMS Ultra 18" pair. TC Sounds is my favorite sub Mfg and the LMS Ultra was the first DIY sub I made that rivaled the JL Audio F113 for SQ while demolishing it for slam and output. The only other sub I would consider using over the LMS Ultra is the RE Audio XXX 18" in an Infinite Baffle installation with a ton of power. I have a single XXX 18" which I have tested in a large ported I made for a Pro sub which was tuned to 25hz, not ideal for the XXX. The output with a HPF enabled was stupid though for a single sub so I can only imagine what people with an IB installation must be experiencing.
Here is a list of the other DIY subs I have owned:
Exodus Maelstrom-X 18" pair
Exodus Maelstrom-X 21"
ACI Maestro 15" driver
ACI Titan II 12" driver (8)
NHT SubTwo 10" driver (10)
Dayton Audio RSS460HO-4 18" (4)
Stereo Integrity HT 18" (4)
RCF LF21N451 21" Pro sub
RE Audio XXX 18"
JL Audio 13W7 13.5"
And probably a few I forget.
What I have learned over the years is that if you have the opportunity to go DIY or even AIY with the great flat pack options it will be by far the best performance for the money. Even then DIY is not for everyone, most people prefer the plug and play option which is understandable.
This is a great hobby, I just wish I had more time right now to enjoy it. Just like popalock I got 99 Problems but a sub ain't 1