SAMSON MPL1502
Owner's Manual

Guided Tour - Main Section
4: Stereo Auxiliary Return Level (gray) - These knobs determine the input level of signal arriving via the MPL 1502�s two stereo Auxiliary returns. Each return is at unity gain (no boost or attenuation) when set to the �0� (2 o�clock) position. The input signal is boosted when the knob is turned to the right of �0� and attenuated when turned to the left of �0.� For information on how to properly set these, see the sections in this manual entitled �Setting the Correct Gain Structure� and �Using the Aux Sends and Returns� (pages 14 and 20). 5: Stereo Auxiliary Return Balance (white) - These knobs determine the relative levels of the left and right input signals connected to the MPL 1502�s two stereo Auxiliary returns. When the knob is placed at its center (detented) position, both left and right input signals for that Aux return are at equal strength. When moved left of center, the left input signal remains at the same strength but the right input signal is attenuated; when the knob is moved right of center, the right input signal remains at the same strength but the left input signal is attenuated. When placed fully counter-clockwise, only the left input signal is heard (panned hard left); when placed fully clockwise, only the right input signal is heard (panned hard right). These �radical� positions are useful when you are using a stereo Aux return as two mono returns�see the �Using the Aux Sends and Returns� section on page 20 for more information. When only the left input of an Aux return is connected, its Balance knob functions as a constant level Pan control, allowing you to continuously place the incoming signal anywhere in the left-right stereo field. 6: Headphone Level (blue) - 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 Headphone Level has no effect on the final Main Mix output level. 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 1502 headphone preamp delivers 150 mw at 30 ohms. 8: Main Mix (green) - This knob determines the final output signal level�you can think of this as being the �master fader.� Signals from all channels and Auxiliary returns are routed here just before leaving the MPL 1502 via its left and right main output jacks. The center detented �0� position of the knob indicates unity gain (no level attenuation or boost). Moving the knob counterclockwise from the �0� position (towards �-��) causes the signal to be attenuated (at the very bottom, it is attenuated infinitely�in other words, there is no sound). Moving it clockwise from the �0� position (towards �+15�) causes the signal to be boosted by as much as 15 dB. For more information, see the �Setting The Correct Gain Structure� section on page 14.

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