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Should You Buy Sensitive Speakers? Uh ... Whut?

What prospective speaker buyers should know: sensitivity and efficiency; manufacturer specifications vs. standardized, objective measurements; sound pressure level; dB, watts, and volts; in-room vs. anechoic; Hoffman's Iron Law; some noteworthy sensitive speakers. 00:00 Introduction 00:26 Efficiency and sensitivity explained 03:41 Impedance and ohms rating 04:13 Example manufacturer specs 06:48 Comparing speakers: ADS, Tannoy, and AR 07:44 What's a dB? Sound pressure level in decibels 09:22 Comparing ADS L730, Tannoy Monitor Gold, and Acoustic Research AR4x 10:52 Watts or volts? 1 W vs. 2.83 V (rms) 12:29 Pros, cons, and pitfalls of shopping for sensitive speakers 13:45 Hoffman's Iron Law 15:15 Hi-fi evolution of speaker sensitivity and amplifier power from tubes to solid state 19:13 How to compare speaker sensitivity across makes and models 21:44 Bass: What you want and how to get it 23:37 Examples of high-sensitivity speakers 28:45 How makers fudge the numbers with psychoacoustics 34:42 The bottom line for bass, box size, and efficiency 35:18 Another comparison: Hartley Zodiac 1B and Wharfedale W70D 37:11 Do I want high-sensitivity speakers? 39:49 No free lunch! 41:15 Take-home points