The Dayton Audio Reference Series sets a new standard of value in high-performance loudspeaker drivers. Product Highlights Full-range capability Long-excursion motor and suspension for strong bass performance Subtle yet high-tech look makes a bold cosmetic statement Great replacement for the Dayton RS100S-8 4" Reference Shielded Full-Range Driver The Dayton Reference Series sets a new standard of value in high-performance loudspeaker drivers. Utilizing a low-distortion motor system with two short-circuit paths and a rigid aluminum cone, the Reference Series can outperform drivers that cost several times the price. Their low-distortion characteristics and high excursion capabilities provide exceptional clarity, detail, and dynamics. Woofer features a black anodized cone, heavy-duty 6-hole cast frame, low-loss rubber surround, solid aluminum phase plug, rubber magnet boot, and gold terminals.