CP,
No, it does not work like that.
Your UCD400 puts out 400 watts at 4 ohm (loudspeaker impedance).
In voltage terms that is 40 V RMS (40 squared divided by 4 = 400).
Let's presume you have a logarithmic potentiometer as volume control (which is normal).
At 50% the volume control might be at minus 30dB (realistic).
Minus 30 dB is 0,013 times full output (40V) which is 0,52 V.
0,52 V RMS is 0,07 wats at 4 ohm.
Now you understand that at normal listening levels power amplifiers usually deliver less than 1 watt. 400 watts are peak powers which seldom occur.
When you want your UCD400 to put out no more than for instance 100 watts at 4 ohms you must reduce the output voltage to 20 V RMS by reducing the power supply voltages to + and - 30 volts. UCD400 runs well on lower power supply voltage AFAIK.
Pieter
No, it does not work like that.
Your UCD400 puts out 400 watts at 4 ohm (loudspeaker impedance).
In voltage terms that is 40 V RMS (40 squared divided by 4 = 400).
Let's presume you have a logarithmic potentiometer as volume control (which is normal).
At 50% the volume control might be at minus 30dB (realistic).
Minus 30 dB is 0,013 times full output (40V) which is 0,52 V.
0,52 V RMS is 0,07 wats at 4 ohm.
Now you understand that at normal listening levels power amplifiers usually deliver less than 1 watt. 400 watts are peak powers which seldom occur.
When you want your UCD400 to put out no more than for instance 100 watts at 4 ohms you must reduce the output voltage to 20 V RMS by reducing the power supply voltages to + and - 30 volts. UCD400 runs well on lower power supply voltage AFAIK.
Pieter
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