Why so many JL Audio Fathom subs for sale I wonder

IME, it's difficult (tho not impossible) to properly integrate subwoofers into a 2 channel music system by ear. Many, many moons ago I tried and failed. I didn't revisit the idea for three decades. Now, I use Audyssey and it's simple and straightforward. However, I doubt that many people here want to go that route. Instead, they try manual set-up and, not surprisingly IME, are disappointed with the results and sell the subs.

As to JL specifically, I suspect it's because JL and REL share the biggest piece of the high end audio market for subwoofers. At any given time, I'd think that one or the other would dominate the re-sale listings here. OTOH, given the lower price point offerings, I'd think that you might see more Velodyne products on e-bay, or the like.

I own Rythmik subs, but I've auditioned JL extensively and think that (provided they're properly set-up) they are outstanding performers.

Marty

The last time I demoed subs was +/- 4 years ago, when I was looking to replace a pair of Velodyne SPLs. Those were pretty good subs (especially considering their compact cabinet size) but I set out to see what a larger sub could do and I subsequently spent A LOT of time around SoCal auditioning.

These demos always vary with the set-up, but - at their best - the JL was very impressive. Overall, outstanding subs. Deep, tight, effortlessly loud on HT demo. Seamlessly extended the bottom end of excellent mains in a two channel system. I personally preferred JL to any other sub I heard on demo (including Velodyne, REL, Martin Logan, TBI and several other well regarded brands that I'd have to work to recall).

I also did a lot of test result study and found that Rythmik and SVS are both monsters on the test bench. Both brands are sold factory direct with an in-home trial period. I ended up buying a pair of Rythmiks for an in-home demo with the idea that they would go back if they didn't measure up. I should note that the Rythmiks are about half the price of the comparable JL, so I figured it was worth the effort. I never did a direct A-B in my system, but I was very happy with the Rythmiks so I kept 'em (and a few bucks, too).

I should also note that, while the Rythmiks feature excellent fit 'n' finish, the JL is a much slicker looking product, IMHO. I'm sure that many people would find the delta in price justifiable, but I decided to pass.

Marty