The are a few differences with a commercial amplifier and consumer receivers. Commercial amplifiers are designed to play a quality audio 24/7 for decades, have as few as features as possible to prevent complexity, and they also output a constant Voltage at 70 Volts compared to an 8 Ohm output consumer receiver. The 70 Volt system converts to 8 Ohm at the speaker to accommodate longer speaker runs and eliminates the need for many home runs from the amplifier to the each speaker. 70 Volt systems are designed to be daisy chained like rungs on a ladder. In addition, they are typically mechanical based devices and still fully work if a remote is lost, typically there is no screen on the amplifier.
Keywords volt ohm theatre reciver