Samson MPL 1502 User Manual

Introduction
Congratulations on purchasing the Samson MPL 1502 stereo mixer! Although
this unit is designed for easy operation, we suggest you first take some time to
go through these pages so you can fully understand how we’ve implemented a
number of unique features.
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
the MPL 1502 should be connected to your existing equipment (including wiring
diagrams) and talk about the important topics of gain structure and grounding
techniques. Next, we’ll cover a number of specific MPL 1502 features (such as
panning, equalization, auxiliary sends and returns, and channel inserts) in detail.
Finally, we’ll wrap things up with a series of applications notes describing how
you can use the MPL 1502 for both live performance and recording. You’ll also
find a warranty card enclosed—please don’t forget to fill it out and mail it so that
you can receive online technical support and so we can send you updated
information about other Samson products in the future.
SPECIAL NOTE: Should your unit ever require servicing, a Return Authorization
number (RA) is necessary. Without this number, the unit will not be accepted.
Please call Samson at 1-800-372-6766 for a Return Authorization number prior
to shipping your unit. Please retain the original packing materials and, if
possible, return the unit in its original carton and packing materials.
MPL 1502 System Features
“MPL” stands for “Microphone/Program/Line” and the name describes the broad
range of signals which can be handled by this powerful stereo mixer. In fact, the
compact design of the MPL 1502 belies an extraordinary versatility. Add excel-
lent sound quality to the equation, and you’ve got a product which is equally
useful as a live performance mixer, keyboard submixer, or even for simple
recording purposes (you’ll find descriptions of each of these applications at the
conclusion of this manual). Here are some of the MPL 1502’s main features:
• Fifteen input channels, including five stereo channels. The five monophonic
channels provide electronically balanced inputs that can be used for micro-
phone or line-level input, and the five stereo channels are ideal for line-level
sources such as outboard signal processors; CD players; tape or cassette
recorders; stereo drum machines; and keyboards and MIDI tone modules.
• An electronically balanced main stereo output for connection to a power
amplifier.
• A dedicated tape input/output that allows direct recording of a live
performance and playback of prerecorded material.
• Two auxiliary sends and two stereo auxiliary returns (which can be used as
four monophonic returns). Both sends are post-fader and post-equalizer.
1

Samson MPL 1502 Specifications

Audio Specifications

frequency response	17 Hz to 30 kHz ± 1.5 dB at +4 dB
equivalent input noise channel 1-5 mic input	-128 dB (A filter, 150 Ω shorted)
equivalent input noise channel 1-15 line input	-131 dB (A filter, input shorted)
total harmonic distortion + noise	Less than 0.03 %
input level channel 1-5 mic input	-50 dBV to +4 dB (10 kΩ, balanced XLR)
input level channel 1-15 line input	-40 dBV to +14 dB (10 kΩ, balanced stereo phone jack)
input level aux return 1-2	+4 dB (47 kΩ, unbalanced phone jack)
maximum input level channel 1-5 mic input	+17 dB
maximum input level channel 1-15 line input	+27 dB
trim gain range	0 dB to +54 dB
channel fader range	+15 dB to -80 dB
aux send gain range	+10 dB to -75 dB
crosstalk ch-to-ch (1 kHz)	-80 dB
crosstalk stereo ch L/R (1 kHz)	-65 dB
standard output level main out	+4 dBV (balanced, 600 Ω loaded)
standard output level aux out	+4 dBV (unbalanced, 2.2 kΩ loaded)
standard output level headphones	150 mW (30 Ω loaded)
maximum output main out	+22 dBV (balanced, 600 Ω loaded)
maximum output aux out	+22 dBV (unbalanced, 2.2 kΩ loaded)
maximum output tape out	+22 dBV (unbalanced, 600 Ω loaded)
tone control high	10 kHz ± 15 dB
tone control mid	800 Hz ± 12 dB
tone control low	80 Hz ± 15 dB

Weight and Dimensions

dimensions	13.8 in (w) x 10.4 in (d) x 3.2 in (h)
dimensions metric	350 mm (w) x 264 mm (d) x 82 mm (h)
weight	7.7 lbs • 3.5 kg