Amplifier loading: why cabinets per channel is a designed number

The arithmetic

Loudspeaker sections in parallel divide impedance: two 8 ohm sections present 4 ohms, four 16 ohm sections present 4 ohms. Professional amplifier channels deliver their rated power into 4 ohms and derate or protect below their minimum load, so the design target is simple: the paralleled sections on each channel should land on the amplifier's optimum load at the intended cabinet count.

This is why section impedance is a specification worth reading. A 16 ohm section is not a weaker section; it is a section designed to be paralleled four deep. A cabinet with 16 ohm sections throughout runs four cabinets per four-channel amplifier, halving the amplifier count of an equivalent 8 ohm design for the same hang.

The trade against control

Fewer cabinets per channel buys control resolution rather than power. With two cabinets per amplifier, gain shading and high-frequency shading can be applied in two-cabinet zones, and far-throw and downfill sections can be driven independently of the main hang. Large-format SSOUNDS elements therefore sit at two cabinets per amplifier by design, while compact elements optimised for coverage per amplifier rack sit at four. Neither number is a limit; both are choices, and the system operation notes on each data sheet state them.