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<blockquote data-quote="John Roberts" data-source="post: 116416" data-attributes="member: 126">Re: 3 phase ampsWhile this is another old story, when I was at Peavey (late 1980s) I designed an amp for the AMR recording division (the PMA70+) this 2x35W continuous amp, put out 2x the voltage (4x the power) transiently. Since this peak power decayed quickly I only rated it for 100W peak for X mSec. Then I recharged the boost circuit so it would deliver 60W for something like 15 seconds, before falling back to the 35W all day long.&nbsp; This amp played much bigger than it was and was sweet for the bedroom recording monitors. Unfortunately my design did not scale up to higher power points cheaply, so this was my first and last amp using this topology. Note: others have used different variants of boosted rail designs with differing degrees of success. With modern class D amps it is simpler to just make the amp put out huge peak power and allow the PS to limit long term power.JR</blockquote>

[QUOTE="John Roberts, post: 116416, member: 126"] Re: 3 phase amps While this is another old story, when I was at Peavey (late 1980s) I designed an amp for the AMR recording division (the PMA70+) this 2x35W continuous amp, put out 2x the voltage (4x the power) transiently. Since this peak power decayed quickly I only rated it for 100W peak for X mSec. Then I recharged the boost circuit so it would deliver 60W for something like 15 seconds, before falling back to the 35W all day long. This amp played much bigger than it was and was sweet for the bedroom recording monitors. Unfortunately my design did not scale up to higher power points cheaply, so this was my first and last amp using this topology. Note: others have used different variants of boosted rail designs with differing degrees of success. With modern class D amps it is simpler to just make the amp put out huge peak power and allow the PS to limit long term power. JR [/QUOTE]

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