Huge displacement and extreme linearity - that's the name of the game with the RL-s15. As noted on the Supreme Series home page, this driver features a patented variable density voicecoil capable of handling up to 2000 watts!  Where other drivers lose BL (force) during excursion in turn creating distortion, the RL-s15 maintains a constant BL, allowing for some of the cleanest low-frequencies ever produced by a subwoofer.	MSRP: $899 each Single Price: $580 each Two or More: $535 each RL-s 15" S4 Set of Two                [ Click Images for Higher Resolution ]
Due to the nature of this product's variable density voicecoil, the T/S parameters will look a little strange when judged on a conventional basis. This is normal, the product is engineered for maximum sound quality in moderate to large sealed enclosures. Single 3 Ohm Measurements Qts: 0.953 Mounting Depth: 25.5 cm Qes: 1.114 Total Depth: 26.8 cm Qms: 5.712 Outside Diameter: 40 cm Fs: 25.51 Hz Weight: 49 lbs Re: 2.92 Ohm Magnet Width: 18.8 cm Ls: 2.445 mH Mounting Cutout: 35.8 cm Rp: 2.81 Displacement: 0.22 cu ft Vas: 85.37 L Mms: 491.4 g Cms: 79.18 u Bl: 14.18 T*m SPL: 82.8 dB Sd: 0.0876 m^2 Xmax: 38.5 mm 1000 - 2000 watts RMS range