Help with sub upgrade

JL's are a fine product for sure. If I were considering a cabinet placement of both subs room EQ would be a big concern to me. JL's have an OK set up system but I would suggest the Velodyne SMS EQ component or simply going with Velodyne subs.

As to which brand gives the better low end is almost a toss up. I had some time with the JL 113 and my DD18, using their own EQ set ups I prefer the Velodyne. After the JL has been EQ'd via the Velodyne it's very close. The JL build quality is a bit nicer than the Velodyne which means nothing after a short time.

One on one in my room I prefer the larger 18" coned Velodyne by a very slight margin, my preference really. Using both at different ends of the room really seemed to lock or tighten up the lows in my room. In hindsight I should have gone with two 12" subs. Keep in mind the EQ is everything IMO.

Even with modern HT room correction EQing the sub/subs prior to running the room correction program is important IMO. In my HT the sub settings are just a little hotter for film than music, again my preference.

Just installed dual 112's and not looking back. Thanks for the input.

My thoughts...I have a full Paradigm Signature S1's,C1,ADP1's with a SVS PB 13Ultra and it sounds incredible. I just purchased a HIFI Pyon subwoofer platform custom fit just for the SVS to raise the sub because it sits too low to ground, also to fine tune the subs overall performance. And that it has done....For the price of a PB 13Ultra and a SVS AS-EQ1 subwoofer equilyzer you would only get one JL F113. And from the reviews of this worlds best sub EQ, the Fathom wouldn't even come close to the bass performance of the SVS & EQ. Even two PB13 Ultra's + EQ would kill 3 JL's in my opinion.

My alternate choice:: Check out Paradigms new Sig Sub 25. Apparently it's a great sub with a big price tag....Great reviews online.

Regards Bacardi

Docrobbi, I am not sure if you are aware of the feet adjustments but you may want to play with those a little and then calibrate again. After you get some real good time on them, if they are new, you will need to do another calibration after break in. Then you will hear the true performance of this sub. The articulation is SOTA. Maybe not the deepest bass out there but the control and openess they provide is simply awesome. The cabinets are also built for longevity which will enable the sub to perform the same ten years or more from now. I don't think I need to go into details about the driver since it is a very tried and tested piece of gear. You made a great chioce!

Mark Seaton's Submersive is something I am looking into.

Kenobi