they also sound outstanding

Ultra Class D Digital Mono Amplifier1 x 450/800/1250 W/RMS @ 4/2/1 ΩSubsonic 10 - 100 HzLPF 50 - 20000 HzBass Boost 0 - 12dB @ 30 - 70 HzRCA low-level input mono 0

Use as a second layer of insulation over existing vibration insulation (aluminum butyl)

Format (12 - 96 kHz)

Product Type: Amplifier Connection Kit / Cable Set

T2S1/S2-16 impedance:D1 - Dual 1 Ohm they also sound outstandingRockford Fosgate T Series The POWER T2 subwoofers look really smart and aren't just made from off the shelf parts. We wanted something better and we knew our fanatics would expect it. Designed for only the most extreme car audio fanatics, the new T2 Series features an oversized driver and a massive 4" (100mm) coil that delivers massive continuous output. Features: Edge wound 100mm (4") aluminum voice coil Glass fiber aramid honeycomb glass fiber cone