Like all M Series models, the M30D is optimized for 4?, and with its output power ideal for small to medium sized sound systems where e.g. no more than two 8? loads are connected in parallel to an amplifier channel: Why overpaying for amplifiers capable of driving 2? loads?
Alternatively, the M30D can drive constant voltage lines directly where multiple loudspeakers are required, but only few different signals.
Maximum efficiency warrants minimum current draw, heat dissipation and power consumption, resulting in “green” products, saving the user a substantial amount of money over time.