Pair of Yamaha A12 PA Speakers. The A Series speakers by Yamaha are designed for live P.A. system use. They are 2-way systems featuring bass reflex, trapezoidal cab design, heavy grille, recessed handles, and black carpet covering. The A12 has a 12" woofer, 1" high-frequency horn, 300W program handling (600W peak), and 125dB SPL.