Uploaded October 2025 | Updated September 2026, 5 hours ago
In the 1960s, amplifier manufacturers were locked in a battle to claim the biggest numbers. Terms like “Music Power,” “Instantaneous Peak Power,” and “IHF Power” appeared in advertisements everywhere, but few listeners really knew what they meant. Behind the impressive figures, the same amplifier could be described as 20 watts, 40 watts, or even 80 watts, depending on the method of measurement.
This video takes you back to that confusing and fascinating period in hi-fi history — when marketing often ran ahead of engineering, and power ratings became a battlefield of exaggeration. We’ll look at how “music power” was invented, why it distorted the truth about amplifier performance, and how technical magazines such as Audio exposed the inconsistencies.
We’ll also trace how the industry began to clean up its act. The Institute of High Fidelity revised its amplifier standards around 1965, and in 1974 the U.S. Federal Trade Commission finally stepped in with strict new rules that required honest, repeatable power ratings. Those changes brought real meaning back to the word “watt.”
Finally, we’ll look at how the same problem still exists today. Modern Bluetooth speakers claiming “1000 watts PMPO” are carrying on the same tradition of inflated numbers that began more than half a century ago.
If you’re interested in hi-fi history, amplifier design, or simply want to understand the numbers behind good sound, this episode is for you. Join me, David Mellor, as we explore how the amplifier power wars of the 1960s shaped the way we measure, advertise, and listen to music today.
#HiFiHistory #AmplifierPower #AudioMasterclass #VintageAudio #Audiophile #audioengineering
NOTE
'RMS power' is more properly called 'average power'. In the interest of not being even more tedious, I used the commonly-understood term.
CHAPTERS
0:00 The 1960s battle over amplifier power ratings
0:50 The power craze of the 1960s
1:44 How power was supposed to be measured
2:43 The invention of music power
3:34 Why it mattered
4:27 Real-world listening vs. laboratory numbers
5:21 The push for standardisation
6:29 What the magazines achieved
7:23 How the debate still echoes today
7:57 What really counts in an amplifier?
8:37 Conclusion?
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OPTICAL AID - tigerspecs.co.uk/item/jelli-multi-coloured-reading-glasses
Disclaimer: Videos on this channel may include affiliate links and may feature software that has been received free of charge with an NFR (not for resale) licence, equipment that has been loaned or donated by a manufacturer or distributer, or equipment that has been bought for less than full retail price.
In the 1960s, amplifier manufacturers were locked in a battle to claim the biggest numbers. Terms like “Music Power,” “Instantaneous Peak Power,” and “IHF Power” appeared in advertisements everywhere, but few listeners really knew what they meant. Behind the impressive figures, the same amplifier could be described as 20 watts, 40 watts, or even 80 watts, depending on the method of measurement.
This video takes you back to that confusing and fascinating period in hi-fi history — when marketing often ran ahead of engineering, and power ratings became a battlefield of exaggeration. We’ll look at how “music power” was invented, why it distorted the truth about amplifier performance, and how technical magazines such as Audio exposed the inconsistencies.
We’ll also trace how the industry began to clean up its act. The Institute of High Fidelity revised its amplifier standards around 1965, and in 1974 the U.S. Federal Trade Commission finally stepped in with strict new rules that required honest, repeatable power ratings. Those changes brought real meaning back to the word “watt.”
Finally, we’ll look at how the same problem still exists today. Modern Bluetooth speakers claiming “1000 watts PMPO” are carrying on the same tradition of inflated numbers that began more than half a century ago.
If you’re interested in hi-fi history, amplifier design, or simply want to understand the numbers behind good sound, this episode is for you. Join me, David Mellor, as we explore how the amplifier power wars of the 1960s shaped the way we measure, advertise, and listen to music today.
#HiFiHistory #AmplifierPower #AudioMasterclass #VintageAudio #Audiophile #audioengineering
NOTE
'RMS power' is more properly called 'average power'. In the interest of not being even more tedious, I used the commonly-understood term.
CHAPTERS
0:00 The 1960s battle over amplifier power ratings
0:50 The power craze of the 1960s
1:44 How power was supposed to be measured
2:43 The invention of music power
3:34 Why it mattered
4:27 Real-world listening vs. laboratory numbers
5:21 The push for standardisation
6:29 What the magazines achieved
7:23 How the debate still echoes today
7:57 What really counts in an amplifier?
8:37 Conclusion?
EQUIPMENT USED TO MAKE AUDIO MASTERCLASS VIDEOS
CAMERA - Sony Alpha A6600 amzn.to/3uj7Dtq
COMPUTER - Apple Mac Mini M2 Pro amzn.to/47tW6Wg
MICROPHONE - Sennheiser MKH 416 amzn.to/3QWWvuO
ALTERNATIVE MICROPHONE - AKG C414 amzn.to/3SLqCad
BUDGET MICROPHONE CHOICE - Rode shotgun amzn.to/3G0ni36
MICROPHONE PREAMPLIFIER - Comica LinkFlex AD2 amzn.to/40SMHFT
TELEPROMPTER - Padcaster Parrot alternatives amzn.to/40A55TJ
TELEPROMPTER SOFTWARE - PromptSmart Pro promptsmart.com
AUDIO INTERFACE - Behringer UMC202HD amzn.to/3ugj6db
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OPTICAL AID - tigerspecs.co.uk/item/jelli-multi-coloured-reading-glasses
Disclaimer: Videos on this channel may include affiliate links and may feature software that has been received free of charge with an NFR (not for resale) licence, equipment that has been loaned or donated by a manufacturer or distributer, or equipment that has been bought for less than full retail price.
![Could these be the most natural sounding headphones? [Moondrop Para]](https://i.ytimg.com/vi/YYWv5cfXWGA/mqdefault.jpg "Could these be the most natural sounding headphones? [Moondrop Para]
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Music - Chloes Irritating Unboxing Music by David Mellor
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CAMERA - Sony Alpha A6600 https://amzn.to/3uj7Dtq
COMPUTER - Apple Mac Mini M2 Pro https://amzn.to/47tW6Wg
MICROPHONE - Sennheiser MKH 416 https://amzn.to/3QWWvuO
ALTERNATIVE MICROPHONE - AKG C414 https://amzn.to/3SLqCad
BUDGET MICROPHONE CHOICE - Rode shotgun https://amzn.to/3G0ni36
MICROPHONE PREAMPLIFIER - Comica LinkFlex AD2 https://amzn.to/40SMHFT
TELEPROMPTER - Padcaster Parrot alternatives https://amzn.to/40A55TJ
TELEPROMPTER SOFTWARE - PromptSmart Pro https://promptsmart.com/
AUDIO INTERFACE - Behringer UMC202HD https://amzn.to/3ugj6db
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TRIPOD - Velbon alternatives https://amzn.to/46gu2oa
GREEN SCREEN - Elgato alternatives https://amzn.to/3SG2F3L
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Disclaimer: Videos on this channel may include affiliate links and may feature software that has been received free of charge with an NFR (not for resale) licence, equipment that has been loaned or donated by a manufacturer or distributer, or equipment that has been bought for less than full retail price.")
