Mackie FR Series M.1400 Specifications

M•1400/M•1400i
The Mackie M•1400/M•1400i is a dual channel, high
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output power amplifier that incorporates a number of
unique features including FR "Fast Recovery" design,
high continuous-current output, built-in subwoofer
crossovers, and a T-Design constant-gradient cooling
tunnel for improved cooling efficiency and output device
reliability.
The M•1400/M•1400i is rated at a continuous out-
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put of 250 watts per channel into 8Ω, 425 watts per
channel into 4Ω and 630 watts into 2Ω. In bridge mode
the M•1400/M•1400i is rated at 850 watts into 8Ω
and 1260 watts into 4Ω. Variable low-cut filters on
each channel, with a range from off to 170Hz, enable
tighter bass response and a Constant Directivity Horn
EQ improves high-frequency reproduction. The CD Horn
EQ is 6 dB/octave and its "knee" position is sweepable
from 2kHz to 6kHz. The built-in limiter is channel
independent and helps eliminate clipping. Inputs are
balanced/unbalanced 1/4" and XLR, and XLR thru con-
nectors allow the full-range signal to be routed to another
M•1400/M•1400i. Speaker connections on the M•1400
are Speakon® and binding posts, while speaker connec-
tions on the M•1400i are 1/4" and binding posts.
To effectively deal with clipping, an amplifier must
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be able to recover almost instantaneously. That is the
definition of "Fast Recovery". Rather than using nega-
tive feedback to help control clipping distortion, the
M•1400/M•1400i employs a very sparse amount of
negative feedback. The use of Baker Clamp circuits on
the positive and negative voltage amp stages prevents
saturation (and latching) during periods of overdrive. In
addition, a transistor senses when the Baker Clamp is
active and activates the internal limiting circuits. This
results in no latching, instant recovery from overdriving
the amp, and a superior sound.
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R E L A T E D P R O D U C T S
M• 800 Power Amplifier, 1202-VLZ PRO 12-Channel
Mic/Line Mixer, 1402-VLZ PRO 14-Channel Mic/Line
Mixer, 1604 VLZ PRO 16-Channel Mic/Line Mixer,
1642-VLZ PRO 16-Channel Mic/Line Mixer, SR24•4-
VLZ PRO 24 Channel Mic/Line Mixer, SR32•4-VLZ PRO
32 Channel Mic/Line Mixer, CFX Series 12, 16, and 20
Channel Mic/Line Mixer w/Digital Effects, C300z 2-Way
Loudspeaker, C200 2-Way Loudspeaker, SWA1501 and
SWA1801 Active Subwoofers.
M•1400/M•1400i
High-Current Power Amplifier

Features

1400 watts max, 1260 watts continuous @ 4 ohms
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bridged
Ultra-low-noise/low-distortion design
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Fast Recovery circuitry reduces distortion at clipping
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Two 2nd order, 12 dB/octave, Bessel low-cut filters with
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variable frequency from Off to 170Hz
Constant Directivity Horn Eq/Air EQ with variable
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frequency from 2kHz to 6kHz and on/off switch
Limiter with on/off switch
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Balanced/unbalanced 1/4" and XLR inputs
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XLR thru outputs
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1/4" jacks (M•1400i) or Speakon® (M•1400) connectors
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and 5-way binding post outputs (both models)
Detented gain controls calibrated in dB and volts
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Signal present and OL LEDs
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Channel Status LEDs
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Superior T-Design cooling
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Five-year, limited warranty (U.S. only)
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Applications

Live sound/music reinforcement for churches,
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clubs, schools, conference centers, hotels
High level A/V playback
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Large speech systems
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