I cannot, however, recommend the same levels for the Smaller Advent (sadly) good way to damage both drivers at the same time. I have run many pair of Large Advent at or above 90 watts RMS (against recommendation) with peaks exceeding 300 watts and suffered no ill effects. It has excellent meters, so I am certain my level was proper. The Yamaha M 60 operates as a class A amp (.001% thd) up to 25 watts, and as a class AB above that (.03% thd). I have done my own measurements using a run-of-the-mill SPL meter, with pink noise through a Yamaha M 60 amplifier and have come up with a reading of 89db at 1 meter in an average sized room with no special baffling or other special dampening. Later in the article, they declare 25 watts of amplification to be sufficient but also stated that 50 - 75 watts is not excessive. At 2 volts input (slightly more than 1 watt, but less than 2) at "3 feet" they came up with a 90db SPL on axis. They used volts as opposed to watts for their measurements. The closest I was able to come is based on a 1970 review by "Audio" magazine.
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