When selecting and connecting an amplifier to a passive loudspeaker, it is important to understand the relationship and impact of impedance load and power wattage between amplifier and loudspeaker. Caution must be used to ensure impedance load of loudspeaker system is compatible with the selected amplifier’s operable range, especially when loudspeakers are wired in parallel, series, or a combination of the two. Incorrect impedance matching may cause irreparable harm to your audio equipment.
When considering power of your amplifier, most audio professionals and audiophile will recommend an amplifier with an output power above the loudspeaker’s power handling rating. A 20-30% "headroom" is typically recommended. This is the ideal set up to maximize audio performance as the extra power will ensure delivery of sufficient power during short periods of audio peaks along with fuller dynamic range and effortless loud volume output. However, the ability to deliver extra power may cause potential damage to the loudspeaker, especially when playing loudly in a sustained period. Caution and restrain must be used to ensure longevity of the loudspeaker under the ideal set up. We definitely do not recommend matching a loudspeaker to an amplifier with headroom above 50% as this is a recipe for blowing out loudspeakers. If longevity and safe operation is more important than optimal audio performance, you should select an amplifier with a RMS power rating at or slightly below the loudspeaker’s rating. Please consult a professional installer if you are unsure about impedance and power level matching.