Me neither, honestly. It's just kind of a curiosity that myself and a few others have noticed it, specifically related to ICEpower amps. Not going to try to convince others, just asking for actual vs. theoretical experiences. :) |
My response last night didn't post, so I'll try again: I agree with Ralph et al that cool-running Class D amps don't require long warmup before playing perfectly. That said, my earlier career in lab equipment design and manufacture suggests that the key to optimal performance is apt to occur when isothermality is reached. With my old Pass Labs Class A amps that warmup effect indeed took 1-1.5hrs. This was a great annoyance, as keeping them running 24/7 at 600w idle heat was VERY annoying to both my pocketbook AND Mother Nature. My ArgentPur GaN-FET Monos reach isothermality (100F) in less than 30minutes. More importanntly, at 11w idle it's convenient to power them 24/7. Yet I want to address another factor that I believe is at play, especially with those who remarked that their systems don't sound great until a brief warmup of, let's say, 10-30min. My contention that this is a human ear-brain acclimation period to a novel acoustic environment, perhaps remarkably different from the prior acoustics, let's say, of your kitchen, bedroom, outdoors, in your car, etc. We simply need time to acclimate to the listening room, especially if there's a dedicated listening chair and well-sorted soundstage. I believe that this ONE of that program directors and conductors play a throw-away introductory piece before the main program in a serious concert. Of course other reasons, such as late-coming audience noise, musician warmup and large force temporal gelling are in play. It may be that the first few minutes don't sound necessarily BAD, but it does SOUND different a few minutes later...and usually for the better. Thoughts? |
no such thing, there is no magic component inside....There is a dwell time for thermal equilibrium in a chassis of a certain size with passive cooling (assuming you have your hvac steady). If you have a fan or something inside your device that kicks on sporadically, it may become a different story. I would wager 99.99% on the following. You are attributing an improvement in sound quality from varying powering quality levels through the day/night to a 48 hr warm-up period. If it sounded so great at 48 hrs, see if it got worse at 50 hrs, 52 hrs, 58 hrs, and got better at 60 hrs or whatever. Class D appears to be more susceptible to it. You may have a rough time testing yourself blind at different intervals though. If you are knee-bent on class D..do as follows. Drop the class D and go with a digital amp like the Technics like the SU-R1000. From the ground up, design and execution are top notch. Actually, there was an ever better one called the SE-R1, but, it is no longer offered unless you find one used. I won’t be selling mine, of course. p.s. I own a precision electronics company. I’ve been in the nitty gritty of this crap a lot deeper than some of you might have.... phd whatever and the world of theorycrafting, you don’t observe and learn the nitty gritty until you are 6 feet under on the floor everyday for months on end.
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