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Volume Stabilizer Active
If the Volume Stabilizer Active light is on, then the output of the audio switcher will be routed through
the Volume Stabilizer circuitry. When the Volume Stabilizer Active light is off, the audio signal is
bypassed and the Volume Stabilization setting will not have any affect on the audio signal.
Volume Stabilization Adjustment
The Volume Stabilization circuitry lets you control the dynamic range of the audio signal to
accommodate your needs. The Volume Stabilizer light must be on for this to function. The numbers
around the knob show the ratio of the input signal to the output signal in db. Thus, the setting in the
middle of 1:1 mean that the input signal is the same as the output signal. Likewise, if you set the knob
full counter clockwise to the 10:1 setting, it means that a 10 db change in the input volume level will
result in only a 1 db change in the output level. This will tend to keep the volume constant even when
the sound changes form soft to loud and back to soft.
Setting Description Use
10:1 Maximum compression
maintains constant volume
level by compressing dynamic
range
Watching movies late at night
Background music
Making tapes for airplane use
2:1 Modest compression Making tapes for automotive use
1.3:1 Slight compression Minimal audio compression
1:1 Normal volume fluctuations Just like bypass (VS off)
1:1.3 Slight expansion Adds some impact to audio sources
1:2 Maximum expansion increases
dynamic range
Restores dynamics to old recordings
Reduces hiss and noise below noise
“floor”
Can “un-do” compression on tapes
made with 2:1 compression
Hint: If you want the minimal volume changes when changing sources, changing channels or
watching a movie, be sure the Volume Stabilization knob is set to the 10:1 position and the
VS ACTIVE light is on.
Note: It is normal to notice volume variations even with the SVS-4 set to the 10:1 setting.
This is due to the fact the human ear is more sensitive to certain frequencies and these
will tend to sound louder. Some commercials on TV have been modified to sound louder
than the normal program. Although the SVS-4 will not eliminate all of these volume
fluctuations with these types of commercials, it will help a great deal to keep the volume
level constant.
Caution: Very loud sound levels can result when using the 1:2 expansion mode. Keep
your volume levels low to avoid damage to speakers or amplifiers
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General