Power Amplifiers

Amplifiers are commonly the most under-specified product in a signal chain.

An amplifier is the engine of your sound system, so incorrect selection of an amplifier can critically affect your system performance – and in some cases, in a damaging and expensive way. Under-powering your speakers can also have a damaging long-term effect, usually resulting in speaker failure.

Selection of the correct amplifier requires a simple mathematical calculation that will tell you just how much power your speakers need to attain optimum performance. Amplifier power should be between 1.5 and 2.5 times the rated long-term power handling of your selected speaker. In smaller applications, 1.5 times is more than adequate, while in larger high SPL systems 2 to 2.5 times the long term power handling is a necessity.

Example

Selected Speaker 12” 2-way rated at 250w, Long-Term with an 8 Ohm Impedance.

Calculation 250w x 1.5 = 375 watts @ 8 Ohms – this is the minimum per channel power amplifier requirement.

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