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Samson MPL 1502 Manual

Samson mixer manual mpl 1502
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Summary of Contents for Samson MPL 1502

  • Page 2: Table Of Contents

    Using Aux Sends and Returns 20 Using Channel Inserts 21 Applications Notes 22 Using The MPL 1502 As A Main Live Mixer 22 Using The MPL 1502 As A Monitor Mixer 23 Using The MPL 1502 As A Keyboard Submixer 24...

  • Page 3: Introduction

    In this manual, we’ll provide you with an overview of the MPL 1502 features, followed by a guided tour of its front and rear panels. Then we’ll describe how...
  • Page 4 “effect loop.” • Input trims for each channel are continuously adjustable from +4 to -50 dB, making it possible to use the MPL 1502 with a wide variety of signal sources and outboard equipment.

  • Page 5: Guided Tour

    The following illustration shows an overview of the front panel of the MPL 1502: MIC INPUT (BALANCED -50dB TO +4dB) LINE INPUT (BALANCED 10K -40dB TO +4dB TRIM TRIM TRIM HIGH HIGH HIGH AUX 1 AUX 1 AUX 1 AUX 2...

  • Page 6: Mono And Stereo Channels

    When connecting only one monophonic signal to stereo channels, use the left (even-numbered) input; the MPL 1502 will then treat that channel as if it is a mono channel, allowing the signal to be panned (using the Balance control)—see the “Using Pan/Balance” section on page 18 for more information.
  • Page 7 MPL 1502. 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...

  • Page 8: Main Section

    1502. The left LED (labeled “Phantom”) lights steadily red when phantom power is being supplied to all 5 mic inputs (see the “Guided Tour - MPL 1502 Rear Panel” section on page 8 for more information). The right LED (labeled “Power”) lights steadily red when the MPL 1502 is powered on.
  • Page 9 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.

  • Page 10: Rear Panel

    2 and 3 of all XLR microphone connectors (mono channels 1 - 5). WARNING: Only turn this on or off with the MPL 1502 powered down. Use phantom power only when one or more condenser microphones are connected to the MPL 1502 (these microphones will correctly load the input in order to “drain off”...
  • Page 11 Guided Tour - Rear Panel 5: Main out (L, R) - These are the MPL 1502’s main outputs. You’ll usually use these to connect the MPL 1502 to a power amp and speakers. The Main out jacks are electronically balanced, so you should use balanced three-conductor cabling and TRS plugs wherever possible (unbalanced two-conductor plugs can also be inserted into these outputs, but you’ll get better signal quality and less...

  • Page 12: Connecting The Mpl 1502 - General Suggestions

    Here are a few basic rules concerning MPL 1502 connections that will apply in most situations: • In general, it’s best to make all connections with the MPL 1502 and any connected power amplifiers turned off. If you must make connections with the power on, make sure that the Main gain control is completely down (turn the knob fully counterclockwise).
  • Page 13 (even-numbered) input. When only the left input is connected in a stereo channel, the MPL 1502 treats that channel as if it is a mono channel and the signal can then be panned (using the Balance control). See the “Using Pan/Balance”...
  • Page 14 Connecting The MPL 1502 - General Suggestions • Signals that are likely to require “in-line” processing (such as compression/limiting or expansion/noise gating) should be connected to channels 1 - 5, since these channels provide an insert connection. Insert cables (sometimes called “Y-cords”) should terminate in standard 1/4”...

  • Page 15: Setting Up And Using The Mpl 1502

    Setting Up and Using The MPL 1502 Setting up your MPL 1502 is a simple procedure which takes only a few minutes: 1. Remove all packing materials (save them in case of need for future service) and decide where the unit is to be physically placed—it can be used on a table- top or optionally mounted in any standard 19”...

  • Page 16: Setting The Correct Gain Structure

    (such as direct injection boxes) from the mic jacks. ** If you’re using an instrument such as electric guitar or bass, we recommend that you connect it to the MPL 1502 with a direct injection box to ensure correct impedance.
  • Page 17 MPL 1502 Aux sends. The idea is to drive these devices as hot as possible (short of overloading them) and then to use the corresponding Aux return level to carefully adjust the amount of processed signal being blended with the dry signal.

  • Page 18: Grounding Techniques

    Three-prong plugs (such as the one used by the MPL 1502) should always be used as is; don’t use adapters to lift the ground (unless you’re using a “star ground network”—see below).
  • Page 19 Grounding Techniques If you’re using the MPL 1502 in a fixed location such as a recording studio, you may want to invest the time and money into creating a star ground network. This is by far the best technique for avoiding grounding problems. It involves using a formidable ground source such as a cold water pipe or a copper spike driven into the earth.

  • Page 20: Using Pan/Balance

    Using Pan/Balance The final Main output of the MPL 1502 is stereo—that is, there are two discrete output jacks, labeled “left” and “right,” which will normally be routed to two discrete speakers.* Because of this, you will usually be working with a stereo field that ranges from hard left to hard right.

  • Page 21: Using Equalization

    One of the most exciting aspects of using a mixer such as the MPL 1502 is the ability to shape a sound, using a process called equalization. But there are few areas of sound engineering more misunderstood than equalization, and, just as good EQ can really help a sound, bad EQ can really hurt it, so read on...

  • Page 22: Using Aux Sends And Returns

    Auxiliary return Balance control to adjust the relative level of each paired signal. In this way, you can actually connect up to four monophonic devices to the MPL 1502’s Aux return section.

  • Page 23: Using Channel Inserts

    Y-cord (see the “Connecting The MPL 1502” section in this manual for a wiring diagram). This configuration is sometimes known as an “effects loop,”...

  • Page 24: Applications Notes

    Application 1 - Using The MPL 1502 As A Main Live Mixer The main connections here involve routing the MPL 1502’s Main output to the input of a power amplifier, and, from there, to PA speakers. Microphones and monophonic line level signals requiring insert processing are connected to mono channel inputs, while stereo line level signals are connected to stereo channel inputs.

  • Page 25: Using The Mpl 1502 As A Monitor Mixer

    Application 2 - Using The MPL 1502 As An Onstage Monitor Mixer Here, the MPL 1502 is receiving monophonic signal into its line inputs from the direct channel outputs of a main live mixer. Its Main output is connected to an outboard signal processor (typically an equalizer) prior to being routed to an amplifier and onstage monitors.

  • Page 26: Using The Mpl 1502 As A Keyboard Submixer

    Application 3 - Using The MPL 1502 As A Keyboard Submixer Here, various keyboards and MIDI tone generators are connected to the mono and stereo line inputs of the MPL 1502. Signal processors are connected to Aux sends and returns and to channel inserts as required. The Main output can then be routed to a stereo input channel of a live performance or recording mixing console, with the performer having complete control over the blend of signals being provided to the sound engineer.

  • Page 27: Using The Mpl 1502 For Recording

    You can also use the MPL 1502 for making simple recordings—for example, when recording a rehearsal or practice session direct to open-reel two-track, cassette, or DAT recorder. Connect the MPL 1502 tape outputs to the inputs of the two-track tape recorder, and connect the Main outputs to a power amplifier driving the control room speakers. The two tape recorder outputs are then returned to the MPL 1502 tape inputs.

  • Page 28: Specifications

    Specifications 1. Frequency Response (0 dB = 1.0 V RMS) 2. Equivalent Input Noise Ch. 1 - Ch. 5 Mic input Ch. 1 - Ch. 15 Line input 3. THD+N (unity gain, 20 Hz - 20 kHz) 4. Input Level Ch.

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