Headphone Peak Led; Headphone Monitoring; Headphone Gain; Headphone Source Selection - Sound Devices 664 User Manual And Technical Information

664 User Guide and Technical Information

Headphone Peak LED

The Headphone Peak LED is located just left of the Headphone Encoder.
This LED will illuminate red to indicate clipping in the headphone amplifi er.
Monitoring without a visual indication of headphone clipping can mislead the
sound mixer into thinking that the output or return feeds are distorted.

Headphone Monitoring

Headphone Gain

Headphone output level is controlled by turning the Headphone Encoder while viewing the Main
Screen or Input Sett ings Screen. When adjusting the headphone gain, the gain value (in dB) is dis-
played in the lower right corner of the LCD (Near the Headphone Encoder). This space displays the
currently selected headphone source when the headphone gain is not being adjusted.
The 664 can drive headphones to dangerously high volumes. Turn down the headphone gain before
selecting a headphone source to prevent accidental signal extremes.

Headphone Source Selection

To select the monitor source, push the Headphone Encoder while viewing the Main Screen to display
the Monitor Source List. This will display a list of available monitor sources. Turn the Headphone
Encoder to highlight a source, and press the Headphone Encoder to select that source. The signal to
the headphone outputs will immediately change to the selected program.
Monitor Source
LR ST
LR Mono
L Mono
R Mono
LR MS ST
X1X2
HP Preset
14
v. 1.0 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
Master Bus in stereo.
Master Bus summed mono to both ears.
Left channel of Master Bus sent to both ears.
Right channel of Master Bus sent to both ears.
Mid-Side Stereo - Master Bus decoded MS stereo to headphones, this is not to be used if the inputs
are already linked as an MS pair.
Aux Bus in stereo.
HP Presets 1-6 are customizable monitor sources.
Headphone gain during adjustment
Headphone Encoder
Description
See Headphone Presets