[Code of Federal Regulations]
[Title 16, Volume 1, Parts 0 to 999]
[Revised as of January 1, 1999]
From the U.S. Government Printing Office via GPO Access
[CITE: 16CFR432.3]

[Page 417-418]
 
                     TITLE 16--COMMERCIAL PRACTICES
 
                   CHAPTER I--FEDERAL TRADE COMMISSION
 
PART 432--POWER OUTPUT CLAIMS FOR AMPLIFIERS UTILIZED 
         IN HOME ENTERTAINMENT PRODUCTS--Table of Contents
 
Sec. 432.3  Standard test conditions.

    For purposes of performing the tests necessary to make the 
disclosures required under Sec. 432.2 of this part:
    (a) The power line voltage shall be 120 volts AC (230 volts when the 
equipment is made for foreign sale or use, unless a different nameplate 
rating is permanently affixed to the product by the manufacturer in 
which event the

[[Page 418]]

latter figure would control), RMS, using a sinusoidal wave containing 
less than 2 percent total harmonic content. In the case of equipment 
designed for battery operation only, tests shall be made with the 
battery power supply for which the particular equipment is designed and 
such test voltage must be disclosed under the required disclosures of 
Sec. 432.2 of this part. If capable of both AC and DC battery operation, 
testing shall be with AC line operation;
    (b) The AC power line frequency for domestic equipment shall be 60 
Hz and 50 Hz for equipment made for foreign sale or use;
    (c) The amplifier shall be preconditioned by simultaneously 
operating all channels at one-third of rated power output for one hour 
using a sinusoidal wave at a frequency of 1,000 Hz;
    (d) The preconditioning and testing shall be in still air and an 
ambient temperature of at least 77  deg.F (25  deg.C);
    (e) Rated power shall be obtainable at all frequencies within the 
rated power band without exceeding the rated maximum percentage 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.
    (f) At all times during warm-up and testing, tone loudness-contour 
and other controls shall be preset for the flattest response.