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RE: Why Do You Believe Audio Equipment "Sounds Better" After It's Warmed Up?

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In Reply to: RE: Why Do You Believe Audio Equipment "Sounds Better" After It's Warmed Up? posted by thetubeguy1954 on May 02, 2008 at 08:38:31

There are undoubtedly small effects on the sound due to the mechanical changes, ie expansion /contraction, which occur as a result of heat cycling. The more dominant effect for the majority of designs will be the thermal drift of the electrical properties of many of the components being used, and not the mechanical effect. As others have mentioned below, electrical components functionality changes predictably based on temperature. The reason many pieces of equipment sound better after being warmed up is designers often understand this heating is going to change things and so work hard to have the design lock into it's best sounding configuration after the thermal drift due to running in normal operation mode finally settles out. For example if a gain transistors curve gets more linear at a certain biasing point then the idea would be to get the circuit to settle at that bias point when everything is warmed up to operating temps whereas if the circuit is designed to have the transistor biased at the sweet spot while cold then when the equipment warms up the bias point will change to somewhere other than at the ideal bias point.

Follow Ups:

Nice answer. Kudos. - Enophile 15:21:31 05/02/08 (1)
- Thanks. - Ugly 16:49:22 05/03/08 (0)

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