Mackie FR Series M.1200 User Manual

1
FEATURES
FAST RECOVERY SERIES HIGH CURRENT POWER AMPLIFIERS
M•1200/M•1400
ARCHITECTS &
ENGINEERS
SPECIFICATIONS
■
“IN YOUR FACE”
SOUND REINFORCEMENT
& RECORDING BROCHURE
MORE INFORMATION
TM
■ Fast Recovery design
for improved transient
response and recovery
from clipping
■ Rack-mountable (2U)
with rear support rails
for extra support
■ Separate left and right
detented gain controls,
calibrated in both dB
and volts
■ Balanced XLR and 1/4"
TRS input jacks
■ Balanced XLR thru jacks
■ Heavy-duty binding post
output jacks in parallel
with:
M•1200 —
1/4" TS output jacks
M•1400 —
Speakon
®
output jacks
■ 6 LED metering includ-
ing Signal Present and
Overload
■ Separate L/R Protect
LEDs indicate the
following protection
conditions:
1) Automatic turn-on
delay to prevent poten-
tially damaging thumps
and pops from reaching
your speakers
2) Short-circuit protect
with separate L/R
indicating LEDs
3) Thermal protect with
combined Ch1 and 2 Cold
and Hot indicating LEDs
■ SCR Crowbar DC offset
protect
■ Low-cut filter with
variable frequency
control (Off – 170Hz)
■ Subsonic stabilization
eliminates ultra-low-
frequency noise caused
by microphone han-
dling, stage rumble
■ Constant directivity horn
compensation with
variable high-frequency
boost control (2kHz to
6kHz)
■ Amp Mode switch for
Stereo, Mono, or Bridge
modes
■ Limiter to eliminate
clipping in both channels
■ Subwoofer mode switch
with dual-frequency select
(63Hz/125Hz)
■ T-Design Constant
Gradient Cooling Tunnel
uses two short tunnels
instead of one long
tunnel for improved
cooling efficiency and
output device reliability
■ Dual-speed cooling fan
■ Toroidal transformer for
reduced EMI emissions
The world is full of amplifiers
that do one thing – amplify
audio signals. But at Mackie
Designs, we’ve always put
out the extra effort to provide
more quality and more
features than our competitors
while maintaining a com-
parable (or lower) price.
The FR Series™ power
amplifiers are designed to
perform reliably under the
most adverse conditions,
and we’ve added a bundle
of extra features, so you
don’t have to put out the
extra bucks to buy a bunch
of add-ons or plug-ins to
make your sound system
do what you want it to do.
Meticulous Detail
Perhaps the most impor-
tant aspect of the FR Series
amplifiers is the attention
to detail in the design of
the electronic architecture.
We have incorporated a
number of unique properties
including Fast Recovery,
sustained high-current output
capability, high voltage and
current slew rate, and defeat-
able clipping eliminator, to
ensure that the output of
the amplifier is virtually
distortion-free.
®

Mackie FR Series M.1200 Specifications

General

Channels	2
S/N Ratio	> 100 dB
Input Impedance (balanced)	20 kOhms
Input Impedance (unbalanced)	10 kOhms
Input Connectors	XLR, 1/4" TRS
Output Connectors	Binding Posts, Speakon
Cooling	Fan-cooled
Amplifier Class	Class AB
Bridged Power (8 ohms)	750W
Frequency Response	20 Hz - 20 kHz
THD	< 0.03%
Input Impedance	20k ohms

Summary

FR Series M-1200/M-1400 Power Amplifiers

Key Features Overview

Lists technical highlights like Fast Recovery, rack-mountability, and versatile inputs/outputs.

Architects & Engineers Specifications

Detailed technical specs for professional sound reinforcement and recording applications.

Meticulous Design Detail

Emphasis on electronic architecture and unique properties for distortion-free audio.

Fast Recovery Technology Explained

Details the amplifier's rapid recovery from clipping using unique circuit designs.

Power Output Specifications

Lists output power in watts for M-1200 and M-1400 at various impedance loads.

Ultra-Low Impedance Capability

Highlights the amplifier's ability to drive 2-ohm loads reliably and effortlessly.

Input and Metering Features

Covers balanced input options, thru connections, and LED metering indicators.

Gain Controls and LED Indicators

Describes independent gain controls with dB/volt calibration and six discrete LEDs for signal level monitoring.

Output Connector Configurations

Details heavy-duty binding posts and specific outputs for M-1200 (1/4" TS) and M-1400 (Speakon®).

Operating Modes Explained

Explains how the amplifier operates in Stereo, Mono, and Bridge modes for flexible audio routing.

Clipping Eliminator Functionality

Describes the defeatable limiter that reduces input signals to prevent clipping without affecting low impedance capability.

T-Design Cooling Tunnel

Details the efficient cooling system design that distributes air evenly to transistors for optimal performance.

Block Diagram Overview

Visual representation of the internal signal flow and component connections within the amplifier.

Physical Dimensions and Weight

Provides detailed measurements (height, width, depth) and weight specifications for the amplifiers.

Subwoofer Crossover Feature

Explains the built-in subwoofer crossover mode with selectable low-pass filter frequencies.

Constant Directivity Horn Compensation

Describes the integrated circuit for optimizing high-frequency response with compression drivers and horns.

Low-Cut Filter Functionality

Details the variable low-cut filter to remove unnecessary low-frequency signals, saving power.

Subsonic Stabilizer

Explains the infrasonic stabilizer that dampens sub-audible frequencies caused by stage rumble or handling.

Protection Circuits Explained

Covers various protection circuits like turn-on delay, short-circuit, and thermal protection.

The FR Series Value Proposition

Highlights the FR Series as an affordable, full-featured, and durable choice in power amplifiers.

Detailed Specifications

Comprehensive technical specifications including output power, distortion, frequency response, and input sensitivity.

Limiter and Indicator Details

Explains limiter functions, meter LEDs, and status indicators like Protect, Short, and Temp.

Power Consumption and AC Line

Details power consumption at idle and full load, and AC line voltage requirements for different regions.

Physical Dimensions and Weight

Provides physical measurements (height, width, depth) and weight for the M-1200/M-1400 models.