Carver Crimson 275

Excellent Condition Bob Carver Crimson 275. One of the Best Values in Performance Tube Amps Available today.

As with our more expensive amplifiers, Bob employs his unique twist on a DC restorer circuit which has two main benefits —lower distortion without dissonant side effects and extended tube and amplifier life.

Totally cool.  Literally!

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   Our amplifiers simply do not run hot. Like their more expensive siblings, they are the coolest running tube type amplifiers in history allowing you to actually touch the tops of the mighty KT120's and never be burned! The internal temperature of our amplifiers is a bit warmer than the inside of your mouth, resulting in an indeterminate lifespan.

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   Due to the unique design, all the components in the amplifier undergo much less stress than in conventional designs. Due to the efficiency of the concept, our transformers can be lighter and despite Bob Carver specifying esoteric steel for their cores, it helps us sell a $4000 amplifier for under $3000. Transformers are traditionally the most expensive component so if there’s no compromise in performance, this is a genuine benefit.

An amplifier that actually listens to the room.

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All loudspeakers generate voltage as they play. It’s generated from the driver movement necessary to reproduce music but also all loudspeakers technically “listen” to the room. Did you know that the loudspeakers in prisons are also microphones? It enables the authorities to monitor the prison’s pulse in real-time. All loudspeakers are microphones. You might not want to use one for recording but conceptually, they are microphones in reverse.

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Loudspeakers are electric motors. Electric motors all kick voltage back to the power source whether it’s a loudspeaker, a refrigerator or an electric drill.  Manufacturers of line conditioners have a point. Your refrigerator motor not only adds noise to the AC line, they actually send electricity back through the wall outlet. We call this Back-EMF.

With a tube type amplifier, when back EMF appears at the output terminals, to the loudspeaker the output transformer’s secondary becomes a primary! The back EMF enters the amplifier through the transformer and affects frequency response downstream. With ordinary tube type amplifiers, speaker matching becomes critical. Our amplifiers are load-invariant. Through decades of experimentation and some pretty heavy mathematics, Bob Carver has been able to use the Back-EMF to increase efficiency in the mighty SunFire subwoofers, and to improve the soundstage and openness of his full range amplifiers.

This is done in a unique fashion, and, as in the case of our extended tube life, unique to our products. The amplifiers listen to the room through the loudspeakers and preserve a large soundstage. It took literally decades to get the circuit right without creating artificial coloration. If you’re concerned about naturalness, consider that Harry Pearson, the founder of Absolute Sound Magazine, noticed this phenomenon, pointed out to Bob (who already knew about it) and kept our Silver Seven amplifiers as his personal reference for years. Dick Olsher from Stereophile Magazine called this series the most important tube amplifiers in decades.