Samson MPL 1502 User Manual

21
Using Channel Inserts
In addition to using Auxiliary sends and returns to access outboard devices, the
MPL 1502 also provides channel inserts for the first five (mono) input channels.
These should be used when you want to affect just one channel’s signal, as
opposed to signal from several channels—most often, this will be for dynamic
processing purposes (such as outboard equalization, compression/limiting, or
noise gating). You can also use the channel insert sends as post-eq (but
pre-fade)
direct outputs, if you need to route a single monophonic signal to an
external device such as a tape deck.
The channel insert jacks on the rear panel accept 1/4” TRS plugs, with the ring
carrying the send signal and the tip carrying the return signal; this will normally
be connected to a 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,” since the signal is sent and returned over the same cable.
If nothing is plugged into the channel insert jacks, they have no effect—but if you
connect them to a passive device like a patchbay, you’ll need to
normal (perma-
nently connect) or
half-normal (connection is made unless overriden by a patch
cord) the send to the return. The insert signal is returned just before the channel
fader. For this reason, you’ll have to be careful to set the output of external
devices connected this way to unity gain.
CHANNEL INSERT - TIP RETURN - RING SEND
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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