Amazon.com: Pioneer TS-SW3001S4 12-Inch Shallow Step Up S4 Subwoofer (Discontinued by Manufacturer) : Everything Else
Amazon.com: Alphasonik AS10DF 10" 1200 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
Rockford Fosgate R2SD210 10" 400W 12 Gauge Car Audio Shallow/Slim Subwoofer Sub - Walmart.com
Amazon.com: American Sound Connection Dual 12" Subwoofer Regular Standard Cab Truck Sub Box Enclosure 5/8" MDF - Gray : Electronics
Rockford Fosgate Prime R2S-1X12 Single R2S 12” Shallow Subwoofer Loaded Enclosure : Electronics
Shallow Subs for Big Bass in a Tight Space
Amazon.com: PIONEER 12" Single 1500W Slim Box W WOOF : Electronics
DS18 12" Shallow Subwoofer Bass Package 700 Watts 2 Ohm with Built In Amplifier - Walmart.com