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Heat Loss and Current-Draw Charts
Heat losses are the thermal emissions from an amplifier while it is operating. It comes from dissipated waste power—i.e., real AC power
in minus audio power out. Measurements are provided for various loads at idle, 1/8 of average full power, 1/3 of average full power, and
full power, with all channels driven simultaneously. For typical usage, use the idle and 1/8 power figures. This data is measured from
representative samples; due to production tolerances, actual heat emissions may vary slightly from one unit to another. Bridged into 8 Ω is
equivalent to 4 Ω per channel; into 4 Ω is equivalent to 2 Ω per channel.
Idle
Thermal loss at idle or with very low signal level.
1/8 Power
Thermal loss at 1/8 of full power is measured with a pink noise signal. It approximates operating with music or voice with light clipping and
represents the amplifier's typical "clean" maximum level, withou t audible clipping. Use these figures for typical maximum level operation.
1/3 Power
Thermal loss at 1/3 of full power is measured with 1 kHz sine. It approximates operating with music or voice with very heavy clipping and a
very compressed dynamic range.
Full Power
Thermal loss at full power is measured with a 1 kHz sine wave. However, it does not represent any real-world operating condition.
Current Draw
The amount of AC current an amplifier demands while it is operating. Measurements are provided for various loads at idle, 1/8 of average full
power, 1/3 of average full power, and full power, with all channels driven simultaneously. The data shown in the following tables is listed for
100 V~, 120 V~ and 230 V~ operation. For typical usage, use the idle and 1/8 power data.
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TD-001585-01-B
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