codewritinfool Posted August 17, 2022 Share Posted August 17, 2022 Not sure where this belongs... https://www.regulations.gov/document/FTC-2022-0048-0001 1 Quote Link to comment Share on other sites More sharing options...
Dave MacKay Posted August 17, 2022 Share Posted August 17, 2022 It would be a good move to have more consistency in how amplifier performance is measured and reported so that meaningful comparisons can be made. 1 Quote Link to comment Share on other sites More sharing options...
Schu Posted August 17, 2022 Share Posted August 17, 2022 is Audio ESG compliant... I thinks not. 1 Quote Link to comment Share on other sites More sharing options...
Racer X Posted August 17, 2022 Share Posted August 17, 2022 Interesting. Apparently before 1974 the claims of amplifier performance were all over the place, and just about meaningless other than a very rough guide. When I started this game in the late 70s, it seemed more standardized with the common "25 watts at less than .04% THD 20 hz to 20 Khz" and this seemed far more reliable. 1 Quote Link to comment Share on other sites More sharing options...
michaelwjones Posted August 17, 2022 Share Posted August 17, 2022 Short cut for reading: § 432.2 Required disclosures. Whenever any direct or indirect representation is made of the power output, power band or power frequency response, or distortion characteristics of sound power amplification equipment, the following disclosure shall be made clearly, conspicuously, and more prominently than any other representations or disclosures permitted under this part: The manufacturer's rated minimum sine wave continuous average power output, in watts, per channel (if the equipment is designed to amplify two or more channels simultaneously) at an impedance of 8 ohms, measured with all associated channels fully driven to rated per channel power. Provided, however, when measuring maximum per channel output of self-powered combination speaker systems that employ two or more amplifiers dedicated to different portions of the audio frequency spectrum, such as those incorporated into combination subwoofer-satellite speaker systems, only those channels dedicated to the same audio frequency spectrum should be considered associated channels that need be fully driven simultaneously to rated per channel power. 3. Revise § 432.3(e) to read as follows: § 432.3 Standard test conditions. * * * * * (e) Rated power shall be obtainable at all frequencies within the rated power band of 20 Hz to 20 kHz without exceeding 0.1% of total harmonic distortion after input signals at said frequencies have been continuously applied at full rated power for not less than five (5) minutes at the amplifier's auxiliary input, or if not provided, at the phono input. Provided, however, that for amplifiers utilized as a component in a self-powered subwoofer in a self-powered subwoofer-satellite speaker system that employs two or more amplifiers dedicated to different portions of the audio frequency spectrum, the rated power shall be obtainable at all frequencies within the subwoofer amplifier's intended operating bandwidth without exceeding 0.1% of total harmonic distortion after input signals at said frequencies have been continuously applied at full rated power for not less than five (5) minutes at the amplifier's auxiliary input, or if not provided, at the phono input. 1 Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted August 17, 2022 Share Posted August 17, 2022 It is good that the testing and methods will be updated. The multi-channel amplifiers need a standardized test and all the amps ordered online and drop shipped from overseas need to be honestly measured and rated. 1 Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted August 20, 2022 Share Posted August 20, 2022 It always amazes me how the law can make anything, even really interesting topics, so boring. 1 Quote Link to comment Share on other sites More sharing options...
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