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On 07/09/13 10:22, Mark Evans wrote:
I used to have an interest in audio amps which tended to be specced for sales purposes as PMP (peak music power) but their "real" power should be quoted as RMS (root mean square), a much lower figure. This is true of any AC system but marketing like bigger numbers. A transformer on its own will be specced at RMS power. What a 500W switched mode power supply refers to I don't know but it sure isn't a 500 watt heater sitting in my computer.-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 06/09/13 10:12, Gordon Henderson wrote:On Fri, 6 Sep 2013, Tom wrote:Do the standard pc power supplies have a transformer in them. Just wondering as I found a 500W job for £12 and I cant get a 500w transformer for anything like thatIn addition to the exitsing replies - always take PC PSU ratings with a huge pinch of salt. If you tried to suck 500w out of one rated to 500w my bet is that it would perform very badly.The same is often true of "customer level" audio amplifiers. So maybe some similar questionable maths is involved. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlIq8EgACgkQsoRLMhsZpFdgcwCeKOe22P9+4nxXTb8Thqr210bd lD4AoIhfugWPWGwPu5Lv1HypJaqgtGTF =r7yc -----END PGP SIGNATURE-----
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