Philips 231B4LPYCB/75 Service Manual page 85

3.17.3 Power Handling
Each speaker transducer shall accept up to the specified Wattage of audio
power without damage or exceeding the frequency response and total
harmonic distortion specifications.
3.17.4 Audio Amplifier
The amplifier shall provide two channels of audio up to 1.5 Watts per
channel from 100 Hz
to 20 kHz, based upon an audio signal input of 1.3V RMS per channel.
3.17.5 Volume Control
For monitors with a manual volume control, the direction (at the bottom) of
the bezel volume control is "-" key for Minimum volume and "+" key for
Maximum volume. The default shipping position of the Volume Control shall
be approximately 90%.
3.17.6 Speaker Sensitivity
The speakers shall support a minimum sensitivity of 75 dB +/- 3 dB at 2W/1m at
1 kHz.
3.17.7 Maximum Audio Card Output
The monitor audio amplifier shall accept a maximum input voltage of
1.5 Vrms and meet the following requirements at the maximum monitor
volume setting:
1. The ratings of the audio amplifier may not be exceeded.
2. The ratings of the speakers may not be exceeded.
3. There must not be any clipping of the audio amplifier output signal.
Voltage dividers may be used to reduce the input signal level.
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