If the two are identical, complete cancellation will occur.
To match transfer functions, the target amplifier's output signal is inverted, and summed with the output of the amplifier to be tweaked. Theoretically, amplifiers with identical transfer functions will sound identical. An amplifier's transfer function is the change between input and output signals imparted by the amplifier. He used a technique that matched the transfer function of his own amplifier to that of the C-J. Gordon Holt's and Larry Archibald's satisfaction, make his inexpensive solid-state amplifier sound like the C-Js. Without repeating the details, the result was that Carver could indeed, to J. Stereophile accepted the challenge, chose the Conrad-Johnson Premier 5 tube monoblock as the target amplifier, and invited Bob out to Santa Fe. The Carver Challenge was precipitated by Bob Carver's announcement that he could make one of his amplifiers sound identical to any other amplifier. Many readers are aware of the famous Carver Challenge, detailed in these pages ( Vol.8 No.6). Now, demand is so great that Silver Sevens are built in groups of 30 pairs. When those sold quickly, another 10 pairs were manufactured. Bob built three pairs of Silver Sevens, not expecting to sell many at the $17,500 asking price. The Silver Seven uses fourteen KT88 output tubes per channel, and puts out 375W into 8 ohms. Interestingly, Bob Carver chose vacuum tubes to realize his dream of building the ultimate power amplifier. The result was the four-chassis, $17,500 Silver Seven. It was more of an ego exercise than an attempt to build a product with wide commercial appeal. In 1988, Bob Carver set out to design the best amplifier he possibly could, without regard for cost.
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