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RE: It's a hybrid.

Cracks me up to look at AA for the first time in maybe a year, and still nothing has changed since 2010. Some poor guy asks for some advice on components and we see the thread deteriorate rapidly into a sort of audio theory acid trip.

To the OP, a rule of thumb that has been used to pretty good effect is you want to be able to hit roughly 102dB peaks. That's instantaneous peaks, not average listening level. The industry standard (recording industry, not audiophile jewelry industry) average listening level is around 82dB, the 102dB is a headroom allowance. Not everyone listens at that 82 dB average level, but it's a good starting point for most as much over 85dB average can cause hearing damage with extended exposure. This implies that you can do the job with a 93dB sensitivity speaker and an 8W 300B amp. Saying things like the falloff at a distance greater than 1M negates the utility of the 1M loudness level figure in a large room shows a lack of practical experience. The reverberant field in the room dominates at mid field listening distances and thus one can pretty much use the 1M distance loudness figure to determine required power at the listening distance unless your system is sitting on the top of a mountain. My experience has been that this approach works quite well.

All of this of course hinges upon how honest the loudspeaker manufacturer is about the sensitivity of their speaker. Suffice it to say I think it is worth questioning a lot of the published specs.


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