Universal Audio 4-710d Four-Channel Tone-Blending - Manual (Page 8)

Getting Started
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Step 10: Make sure the Power switch is off (down position) and then connect the supplied IEC power
cable to the rear panel AC power connector.
Step 11: Power on the 4-710d. The front-panel meters will light up.
Step 12: If a microphone requiring 48 volts of phantom power is connected to the 4-710d, turn on the
channel’s +48V switch.
Step 13: Unmute your monitors and slowly raise the channel’s Gain control. You should now be
hearing signal, with that channel’s meter becoming active.
Step 14: While viewing the meter, set the channel’s Gain control until optimum input signal strength
is achieved. Change the channel’s Meter switch to OUTPUT (its up position) and set the Level control
until optimum output signal strength is achieved.
Step 15: Experiment with differing degrees of Gain to hear the various amounts of coloration the 4-
710d can impart to your signal. (CAUTION: Very high Gain settings will result in significant amounts of
distortion). For the cleanest, most uncolored signal from the 4-710d, set the Gain knob to its lowest
usable setting, change the Meter to OUTPUT, and then adjust the Level control as necessary. If you
hear distortion when using a connected microphone even at the lowest Gain level, employ the -15 dB
pad to reduce the input level. If you hear low frequency rumble, employ the Low Cut filter switch.
Step 16: Finally, experiment with the Blend control to hear the different sonic signatures imparted by
the two discrete preamplifiers contained within the 4-710d. At the fully counterclockwise (TRANS)
position, only signal from the solid-state preamplifier is heard. At the fully clockwise (TUBE) position,
only the signal from the tube preamplifier is heard. Most uniquely, it is the in-between settings that
allow you to access the “twin-finity” of sounds offered by the 4-710d and create a custom blend that
best complements your signal source.
 Because the Model 4-710d utilizes a tube, it needs several minutes to achieve a stable
operating temperature. During warm-up, audio quality may vary slightly.
 For more detailed information, refer to the “Front Panel” and “Rear Panel” sections on
pages 9 and 14 of this manual.