Highland Born: A Scottish Medieval Romance (Highland Legion)

ALTO TX18S 900W 18" Subwoofer, DSP-Enhanced Powered PA Speaker with 3" Voice Coil, Superior Bass, Easy Setup

Resilient Sounds Platinum 18" subwoofer D2 Conservative 2,000RMS

The Buick: A Complete History (90th Anniversary Edition) (Automobile Quarterly Library Series)

Sundown Audio M18 Car Subwoofer – 18" Dual 1 Ohm, 2000W RMS/4000W Peak, 3" Aluminum VC, 35mm Xmax, Mega Roll Surround, Quad Magnet Motor, Low-Distortion SPL Sub

Harmony Audio HA-P18LS8 Replacement 18" Pro PA 1600W Subwoofer/Speaker 8 Ohm Woofer

Behringer DR18SUB Active 2400-Watt 18" PA Subwoofer with Built-In Stereo Crossover

H YANKA BSF-18-4 18 Inch Subwoofer - 2500W MAX Power Car Audio Bass Speaker - 2.5" Dual Voice Coil, 4 Ohm Impedance, Aluminum Basket, Paper Cone Subwoofer for Cars

Sound Town METIS Series 2400 Watts 18" Powered Subwoofer with Class-D Amplifier, 4-inch Voice Coil, High-Pass Filter (METIS-18PWG)