Rated Power into 4 Ohms
Rated power into four ohms is an amplifier’s stated output in watts for that load, usually given per channel.
“2 × 200 W, both channels driven” means 200 W per channel with both tested together. It describes amplifier output, not speaker power handling or electricity taken from the wall.
Rated Power into 4 Ohms — Power Amp
At the same output voltage, four ohms demands more current than eight. Amplifiers have current and supply limits: do not double an eight-ohm figure to invent a four-ohm rating.
Compare the same load, frequency range, distortion limit and number of channels driven. A short burst at 1 kHz does not establish continuous output across 20 Hz–20 kHz. Unstated conditions remain unknown.
Follow the amplifier maker’s permitted speaker loads and operating-mode instructions. Higher watts alone prove neither better sound nor suitability for every speaker.
Sources
- Amplifier Anatomy — QSC
- Speaker requirements — Yamaha
Sources
- AHB2 power specifications — Benchmark Media Systems