5515-22 15" DVC 2-Ohm Car Audio Subwoofer

The MTX 5515-22 tops out the 55 Series at 15 inches, keeping the same 400 watt RMS / 800 watt peak rating as the smaller subs in the line while adding the low-frequency extension that comes with a larger cone. Frequency response reaches down to 19 Hz, noticeably lower than the 10 and 12 inch versions, which matters for anyone chasing deep, felt-more-than-heard bass rather than just SPL.

The Inverted Apex surround increases usable cone surface area for higher output per watt, while Spider Plateau Venting and a radial ribbed t-yoke manage heat at the voice coil during extended play. A progressive suspension keeps excursion under control as power climbs, so the low end stays defined rather than breaking up. At 8.0 inches of mounting depth, the 5515-22 needs a bit more room than the smaller subs, fitting a 1.5 cu ft sealed enclosure for tighter bass or a 2.48 cu ft vented box for maximum output. It is the option for anyone who has the trunk space and want the deepest bass the 55 Series offers.