Samson MPL 1640 manual Guided Tour Main Section

Guided Tour - Main Section

6:Headphones control (black) - This knob sets the level of the signal sent to the headphone jack (see #7 below). WARNING: To avoid possible damage to connected headphones (or, worse yet, to your ears!), always turn this all the way off (to the fully counterclockwise “0” position) before plugging in a pair of headphones—then raise the level slowly while listening. The Headphones control has no effect on the final Main Mix or Bus 3/4 output levels.

7:Headphone jack - Connect any standard stereo headphones to this jack (via a standard 1/4” TRS plug) for private monitoring of the main stereo output. The built-in MPL 1640 headphone preamp delivers 150 mw at 30 ohms.

8:Main L/R Faders (white with blue line) - These linear sliders determine the relative level of the two Main Left/Right outputs just prior to being sent to the rear panel Main Mix output jacks (as described on page 8). The “0” (detented)

position of each fader indicates unity gain (no level boost or attenuation). Moving the fader below this position (towards the “-∞” dB position) causes the signal to be attenuated (at the very bottom, it is attenuated infinitely—in other words, there is no sound). Moving it above this position (towards the “+15” position) causes the signal to be boosted by as much as 15 dB.

For best signal-to-noise ratio, both Main L/R faders should generally be kept at or near the detented 0 level. See the “Setting The Correct Gain Structure” section on page 12 of this manual for more information.

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