![]() Ohm tried with a more extended treble while keep the three variables the same. So, to beat the AR-3a, the speaker designer needed to compromise one of these variables. This law held that with three variables (size, low-frequency response, and efficiency), once you have chosen two, the third variable is determined. To beat it with another acoustic suspension speaker was tough because of the limits of Hoffman’s Iron Law. Extremely well reviewed and wildly popular, it was the model to beat for all other manufacturers. Introduced in 1969, is was the most refined version of Edgar Villchur’s innovation of acoustic suspension speaker design. The AR-3a was, without doubt, the standard of the industry. They were very HiFi and great for stereo reproduction in the home. These “small” speakers used designs that traded off sensitivity for size and frequency response. Bookshelf speakers could now go deeper in the bass and higher in the treble than the refrigerator-sized speakers that preceded them. These amplifiers allowed a major change in speaker design and improvement in sound. The introduction of “big” amplifiers (60 watts instead of 3 watts) at reasonable prices propelled the Golden Age of Audio. ![]()
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