[Code of Federal Regulations]
[Title 16, Volume 1]
[Revised as of January 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 16CFR432.3]

[Page 428]
 
                     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 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-eighth of rated power output for one hour 
using a sinusoidal wave at a frequency of 1,000 Hz; provided, however, 
that for amplifiers utilized as a component in a self-powered subwoofer 
system, the sinusoidal wave used as a preconditioning signal may be any 
frequency within the amplifier's intended operating bandwidth that will 
allow the amplifier to be driven to one-eighth of rated power for one 
hour;
    (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.

[39 FR 15387, May 3, 1974, as amended at 65 FR 81240, Dec. 22, 2000]