Universal-audio 6176 Channel Strip User Manual download pdf (Page 7)

The Two Page, Two Minute Guide To Getting Started

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Step 8: On the right side of the front panel, set the Ratio switch to BP (fully counterclockwise) in order

to temporarily bypass the 6176 limiter / compressor section. Set the Meter switch to PRE so that the

meter displays the output level of the signal leaving the 6176 preamp section.

Step 9: Power on the 6176. The purple LED above the power switch will light up.

Step 10: If a microphone requiring 48 volts of phantom power is connected to the 6176, turn on the

+48V switch (up position).

Step 11: Unmute your speakers and begin monitoring the 6176 Compressor line output. Use the 6176

front-panel Input Select switch to select the connected source and then apply input signal while

slowly increasing the Level control to approximately 7. You should now be hearing signal.

Step 12: While watching the 6176 meter, set the preamp Gain switch (on the left side of the front

panel) so that sufficient signal strength is achieved. Experiment with differing degrees of preamp

Gain and Level to hear the various amounts of coloration the 6176 can impart to your signal. For the

cleanest, most uncolored signal, set the Gain switch to its lowest usable setting with Level set

between 7 and 10. If you are using a microphone and you hear distortion even at the lowest Gain

level, employ the -15 dB pad to reduce the input level. If you are using a connected microphone or Hi-

Z instrument input, experiment also with various impedance settings to achieve optimum tonality for

your source signal.

Step 13: Experiment with the effect of the 6176’s high and low shelving filters on your source signal.

Step 14: Now it’s time to activate the limiter/compressor section of the 6176 on the right side of the

front panel. Begin by setting the Input and Output knobs to approximately 5 (12 o’clock position) for

unity gain. Then set the Ratio to 1 (or, alternatively, turn the Attack knob past its fully

counterclockwise position so that it clicks). In this mode (a compression ratio of 1:1), signal passes

through the limiter/compressor section, thus adding “color,” but with no gain reduction. Compare the

difference in tonality between ratios of BP and 1.

Step 15: To hear the effect of the 6176 gain reduction circuitry,

select different Ratios of 4, 8, 12, 20, and ALL. (ALL mode

duplicates the overdrive that occurs when all four ratio buttons

on an original 1176 are pushed in simultaneously) and varying

the Input level and Attack and Release times. Note that, unlike

many other devices, the 6176 attack and release times are faster when their associated knobs are

turned clockwise, and slower when they are turned counterclockwise. Set the Meter switch to GR in

order to view the amount of gain reduction being applied to the signal. Note that as you increase the

amount of gain reduction (by raising the Input level and/or selecting higher ratios), the overall signal

may be attenuated. If necessary, you can make up the difference by turning the Output knob

clockwise. Change the Meter switch to COMP in order to view the final output level. A meter reading

of 0 corresponds to an output level of +4dBm at the 6176 output.

Step 16: Set the JOIN/SPLIT switch in the center of the front panel to its down (SPLIT) position. In this

mode, the internal connection between the output of the 6176 preamp section and the input of the

limiter/compressor section is broken, so that each section functions as an independent device, each

with its own dedicated input(s) and output.

 Because the 6176 is a tube device, it needs several minutes to achieve stable operating

temperature. During warm-up, audio quality may vary slightly.

 For more information, refer

to the “Front Panel” and

“Rear Panel” sections on

pages 3 – 9.

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Universal-audio 6176 Channel Strip User Manual Page 7

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