Automatic Mute Function - Audio Research VSi75 User Manual

12
Operation

Automatic Mute Function

The VSi75 has several provisions to help protect against misuse of the
exceptional dynamic range and wide band width that it offers. It is not
subject to damage itself, but some speakers are more limited in their
ability to with stand signal extremes. These provisions, both manual and
automatic, are designed not to interfere with the listening experience,
while giving reasonable protection against warm-up surges and power line
interruptions. However, for absolute protection of associated equipment,
some operator understanding and responsibility are required.
Initial "settling" time of all circuit parameters within the VSi75 requires
approximately 5 to 10 minutes. The automatic muting circuitry timer is
adjusted for about 40 seconds. (This is because recurrent interruption
"settling" time is much less. You would not want to wait for 5 to 10 minutes
each time such an interruption occurred.)
The Mute button allows manual disabling of the VSi75 inputs during the
switching of equipment. Use of this switch will minimize stress on your
VSi75 and other components. It is also highly recommended that manual
muting be employed during turn-off for maximum protection. The automatic
muting operates as follows:
1. The automatic muting always disables all inputs and overrides any manual
settings. (The "Operate" position of the manual Mute function is operational
only when the unit is not in the automatic mute mode.) Note: Power supply
regulation of the VSi75 is effective down to 100VAC (120V units) without
serious sonic degradation.
2. The automatic muting of the VSi75 is designed to be effective only against
power line interruptions and power line failures. It will not mute against
subsonic signal transmissions from your input source. Proper fusing of
speakers is essential to protect against excessive audio signal levels.