Radio Shack MACH, 2 speakers in very good condition as well as a pair of 15 inch Rockville speakers currently being sold on eBay for a $64.95 each eBay item number:405768838725
Rockville RVP15W8 15" 1000 Watt Raw Replacement Subwoofer. Power RMS: 500 Watts. Peak Power: 1000 Watts.
Fiber Reinforced Ultra Stiff Paper Composite Cone. Paper Composite Dust Cap. Expanded and Rolled Steel Basket. Accordion Cloth Surround.
Ultra Saturated, High BL Magnetic Motor Gap. 2.5" High Temperature CCAW High SPL Voice Coil. Linear Progressive Conex Spiders. Dual Nickel Plated Banana Plug Terminals.
Impedance: 8 Ohms. 51 oz Magnet. Mounting Depth: 5.7" inches. Frequency Response: 25 Hz to 1.5 KHz. Sensitivity: 100dB @ 1w/1m.
The Realistic Mach Two speakers are a high-quality three-way system with a 15-inch woofer, 5-inch midrange, and a dual radial super horn tweeter. They have a frequency response of 25-40,000 Hz, an impedance of 8 ohms, and a power handling capacity of 160 watts. The speakers also feature adjustable midrange and high-frequency level controls and a tuned port design for extended bass response