6
Operating the S•phone
SETTING UP THE S•phone
Setting up your S•phone Headphone Amplifier is a simple procedure, which takes only a few minutes.
Remove all packing materials (save them in case of need for future service) and plug the provided AC power cord
in the rear AC inlet, but don’t plug the power cable into a wall outlet just yet.
• Connect the output from the device you want monitored to the Left/Right MAIN INPUT jacks on the
S•phone rear panel. The S•phone accepts both balanced and unbalanced signal. Generally, a balanced
signal is preferable because it provides better signal-to-noise ratio and reduced extraneous noise.
• Set the controls to the following positions:
MASTER VOLUME – OFF
CHANNEL 1 MUTE SWITCH – OUT
CHANNEL 1 ST/2CH SWITCH – OUT
CHANNEL 1 HIGH FREQUENCY – 0
CHANNEL 1 LOW FREQUENCY – 0
CHANNEL 1 PAN – CENTER, 12:00
CHANNEL 1 VOLUME – O
CHANNEL 2 - 4’s Controls - Set the Same as Channel 1
• Turn the Master Volume knob and all four headphone Channel Output knobs to their minimum (fully
counterclockwise) setting.
• Plug the S•phone power cable into a wall outlet and switch the unit on by pressing the power switch.
• Apply a signal, like the output of a mixer playing a CD, to the S•Phone’s rear-panel Left/Right MAIN
INPUT jacks. Raise the MASTER VOLUME until the meter reaches -18 to -12 dB.
• Connect a set of headphones to Channel 1 and slowly turn the channel’s Volume knob clockwise until
you hear the desired level.
WARNING: Because the S•Phone is capable of generating extremely high volume levels, always start with the
Channel Volume knob at minimum and then slowly turn it up.
