Hertz HMX 6.5 6-1/2 2-way marine/powersports speakers – PAIR (2 SPEAKERS = PAIR). Hertz designed their HMX 6.5 6-1/2 marine speakers to bring high-quality audio to any boat. These rugged speakers will handle up to 75 watts RMS, so they’ll be able to cut through the noise from your engine and the wind.