Product Brand & Model: ESB Italy 10" series 6000 Subs, model SW-6B.25 also known as Zapco Reference Blue 10s Each sub has a dual 4 ohm coil configuration a few quick specs Fs: 26.24 Hz Xmax 15mm sensitivity 86.8 db 1W/1m Qes .399 Qts .299 pm me if you want a full spec sheet emailed...