The PM400L series of power amplifier modules are intended for incorporation in other electronic equipment such as powered speakers where the end user does not come into direct contact with the output speaker connections. The amplifiers are line powered and provide CSA/UL/VDE isolation from the power line. They also meet FCC class A emissions requirements. The units in the series are:
- PM400LA – This module is designed for operation off 110/120VAC power systems such as North America
- PM400LE – This module is designed for operation off 220/240VAC power systems such as Europe
- PM400LU – This module has a universal supply input and PFC for special applications where power factor correction or a wide input supply is required.