Originally Posted by uddup76
I am looking to buy speakers but i see some speakers rated like Recommended Amplifier Power 20-150 watts per channel.. like polk audio for example they rate all speakers the same way..my question is usually whats the rms for speakers rated like Recommended Amplifier Power 10-100 watts per channel?
The actual power required to drive a speaker without amplifier distortion primarily depends on:
(1) Speaker efficiency
(2) Listening distance from speaker to listener
(3) Preference for SPL.
Based on SPL meter readings (fast response, peak hold, C weighting) My main audio system generates peaks of about 90 dB when my wife and I are using it to listen to CDs, DVDs, streaming media, TV, etc. This takes much less than 20 wpc. My speakers have average efficiency and there are subwoofers crossed over at 80 hz in the system. The listening distance is about 12 feet.
If I turn this system all the way up, the SPL meter finds peaks of 107 dB which is uncomfortably loud. No audible clipping. The system is optimized using Audyssey Multieq, and the channel trims are less than +12 dB so I could push them all up and obtain even louder levels, but I don't know if there would be clipping.
Looking at the current state of audio technology, speaker power recommendations should be taken as just that - not hard and fast rules but recommendations. The people who make them have no idea what your specific situation is, and so they are broad approximations.