- Joined Apr 5, 2008
The amazing one that I saw was a set of amplified computer speakers with a claim of 100 watts output, powered by a wall wart specified as "12 volts @100mA. It might have been 100 MILLIWATTS output, a believable number.I have one of those. On the face of it are the words "1200 Watts PMP" Looking inside there were about six TO-92 transistors and not much more. It was worth the US$10 equivalent just for the laugh.
Ah, yes, the infamous "peak music power".I have one of those. On the face of it are the words "1200 Watts PMP" Looking inside there were about six TO-92 transistors and not much more. It was worth the US$10 equivalent just for the laugh.
That "PMP" may stand for "Peak Milliwatts Power", which might be close. IHF power was an interesting term, as was IPP.Ah, yes, the infamous "peak music power".
That's like all of the air compressors, with a 115 VAC 15 A plug, that are labeled as 5 HP or even higher. I've been waiting for someone to call it "peak air power".
Most of these have little, if any, technical merit at all. They are pure marketing hype coined by marketing people because they think people that don't know any better will be impressed by the technobabble. In some cases they make some effort to tie them to something that might possibly have a definition -- such as the peak power that a speaker could absorb for no more than one microsecond without damage -- so that they have something to baffle the courts if they ever get sued, but in most cases they have never actually measured anything related to it.That "PMP" may stand for "Peak Milliwatts Power", which might be close. IHF power was an interesting term, as was IPP.
IHF was the power output if a solid pwer supply were connected in place of the actual power supply, so that the voltage would not vary at all.
IPP power is the power of the first half-cycle of a tone burst, before the supply voltage drops or anything heats up.
RMS watts is an an interesting claim, possibly the product of RMS volts out times RMS amps out, but it is never mentioned in any engineering books of any kind. Probably it relates to steady-state watts at some distortion level.
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