Filter Filters Harmony Audio Remove All Filters Price Under $50 (3) $50-$100 (7) $100-$500 (67) $500 and above (14) Condition New (90) Refurbished (1) Size 12" (7) 10" (5) 15" (5) 18" (2) 6.5" (1) 8" (1) Voice Coils 4 Ohm (2) Dual (1) Single (1) Amplifier Class Class D (2) Stable to (Ohm) 1 Ohm (2) Make Chevy (4) Dodge (1) Ford (2) Nissan (1) Model Corvette (4) F-150 (2) Ram Truck (1) Titan (1) Sensitivity 87.1 dB (1) 89.4 dB (1) 89.5dB (1) 92.2dB (1) Channels 1 (2) Fixture Type Dual (1) Single (3) Compatible with 2002-2018 Dodge Ram Quad / Crew Truck Alpine Type S S-W10D4... $295.99 Harmony Audio HA-ML181 Competition SPL 18" Sub Subwoofer Bundle with Kicker... $599.99 Compatible with 2015 - UP Ford F150 Super Crew Alpine Type S S-W10D2 Dual 10"... $456.99 Compatible with 1999-2006 Chevy Silverado Extended Cab Truck Kicker Comp C12... $430.99 Harmony Audio HA-CMB8 Car Stereo Carbon Midbass Midrange 8" Speakers - 3 Pairs $140.99 8x Harmony Audio HA-C152 Car Competition 15" Sub 2800W Dual 2 Ohm Subwoofer New $1430.99 Harmony Audio HA-CMB8 Car Stereo Carbon Midbass Midrange 8" Speakers - 4 Pairs $182.99 Harmony Audio HA-CMB8 Car Stereo Carbon Midbass Midrange 8" Speakers - 2 Pairs $98.99 2x Harmony HA-ML181 Monolith 18" Competition SPL Sub 3500W Dual 1 Ohm Subwoofer $724.99 1997-2004 Chevy Corvette Coupe C5 Z06 Harmony F124 Single 12" Sub Box & CXA400.1 $319.99 2x Harmony Audio HA-C122 Car Competition 12" Sub 2200W Dual 2 Ohm Subwoofer New $324.99 (1) 4x Harmony HA-ML182 Monolith 18" Competition SPL Sub 3500W Dual 2 Ohm Subwoofer $1420.99 1997-2004 Chevy Corvette Coupe C5 Z06 Harmony R124 Single 12" Sub Box & CXA400.1 $295.99 2x Harmony HA-ML122 Monolith 12" Competition SPL Sub 3000W Dual 2 Ohm Subwoofer $589.99 Compatible with 2005-UP Toyota Tacoma Double Cab Truck Alpine Type S S-W10D2... $475.99 4x Harmony HA-ML121 Monolith 12" Competition SPL Sub 3000W Dual 1 Ohm Subwoofer $1174.99 2x Harmony HA-P12WS16 Replacement 12" Pro PA 500W Sub / Speaker 16 Ohm Woofer $104.99 2009-2015 Ford F-150 Super Crew Truck Harmony R124 Single 12" Sub Box & CXA400.1 $275.99 Compatible with 2005-UP Toyota Tacoma Double Cab Truck Alpine Type S S-W10D2... $464.99 4x Harmony HA-ML151 Monolith 15" Competition SPL Sub 3200W Dual 1 Ohm Subwoofer $1300.99 4x Harmony Audio HA-C104 Car Competition 10" Sub 2000W Dual 4 Ohm Subwoofer New $580.99 2x Harmony Audio HA-C102 Car Competition 10" Sub 2000W Dual 2 Ohm Subwoofer New $284.99 Harmony HA-P18WS8 Replacement 18" PA Speaker Woofer for Mackie Thump18S Sub $89.95 4x Harmony Audio HA-C102 Car Competition 10" Sub 2000W Dual 2 Ohm Subwoofer New $554.99 1234