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.
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.