Minimum Speaker Load
Minimum Speaker Load is the lowest loudspeaker impedance an amplifier is specified to drive, in ohms (Ω), under the maker’s stated conditions.
A 6–16 Ω range has a 6 Ω minimum; retain the upper limit too. The amplifier’s own opposition to current flow is its output impedance. Labelled output taps are connections for specified speaker loads.
Minimum Speaker Load — Power Amp
Nominal impedance is a speaker’s stated rating; its actual impedance changes with frequency. Check whether the amplifier’s limit refers to nominal ratings rather than treating every dip as a mismatch.
Use the limit for the selected mode: bridged mono combines channels and may require a different load. Parallel speakers lower their combined impedance. Check the manual’s speaker-count limits, impedance setting and tap instructions. Unsupported loads can cause distortion, protection shutdown or overheating. A lower minimum does not establish better sound.
Sources
- AHB2 manual: load guidance and protection — Benchmark Media Systems
- Measuring amplifiers with reactive loads — Audio Precision
- R-N600A: speaker loads and simultaneous outputs — Yamaha
- R-N600A: speaker impedance setting — Yamaha
- Speakers: parallel connections and impedance — Yamaha
- Amplifier output impedance and speaker load — Benchmark Media Systems
- MC2.1KW: labelled speaker output connections — McIntosh