TM
FAST RECOVERY SERIES HIGH CURRENT POWER AMPLIFIERS
MORE INFORMATION
FEATURES
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.
■ 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
M•1200/ M•1400
ARCHITECTS &
ENGINEERS
SPECIFICATIONS
■
“IN YOUR FACE”
SOUND REINFORCEMENT
& RECORDING BROCHURE
■ 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
■ 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:
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.
■ Limiter to eliminate
clipping in both channels
■ Subwoofer mode switch
with dual-frequency select
(63Hz/ 125Hz)
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
■ T-Design Constant
Gradient Cooling Tunnel
uses two short tunnels
instead of one long
tunnel for improved
cooling efficiency and
output device reliability
3) Thermal protect with
combined Ch1 and 2 Cold ■ Dual-speed cooling fan
and Hot indicating LEDs
■ Toroidal transformer for
■ SCR Crowbar DC offset
reduced EMI emissions
protect
®
Download from Www.Somanuals.com. All Manuals Search And Download.
so it doesn’t
degrade the
audio signal in
any way.
T-Design
Constant
Gradient
Cooling
Tunnel.
Most amplifi-
ers have a fan
in the back that
blows air (along
with dust and
Each channel
has an inde-
pendent gain
control with
40 detents for
accurately
setting and
matching the
gain between
channels. The
gain controls
are calibrated
in dB (from
off to 30) and
in volts (with
indications of
other contami-
nants) into the
inside of the
amplifier, across
1V, 2V, and 3V).
Six discrete
LEDs are used
the heatsinks
as well as all the other inter-
nal components, and finally
out through the front.
These designs are cheap to
implement, but not very
efficient.
Others use a cooling tun-
nel with the fan at one end.
The problem with this design
is that the heat from the
first transistors warms the
air so that by the time the
air reaches the end of the
tunnel it’s too hot to provide
sufficient cooling.
Our T-Design Constant
Gradient Cooling Tunnel
offers a much more efficient
method of providing cool
air to all the transistors with-
out blowing contaminants
all over its insides. A dual-
speed fan is located in the
center of the amplifier, direct-
ing air from the front of the
amplifier
fier operates with one input
and two identical outputs. It
accepts an input signal through
channel 1, and outputs the
same signal at both channel
1 and 2 speaker outputs.
In bridge mode, the ampli-
fier operates with one input
and one output. It accepts an
input signal through channel
1, and combines the power
of both output sections into
a single output, using the
channel 1 positive and
to indicate signal level for
each channel, including a
signal present LED, indicators
at –20, –9, –6, and –3dB
below full power, and an
overload LED to indicate
when the output has reached
the clipping point.
Outputs.
The M•1200 and M•1400
differ in their output con-
nector configurations. They
both come with heavy-duty
5-way binding posts, which
can accept standard double
banana plugs, spade lugs, or
bare wire (Export versions
will not accept banana plugs
due to European safety
requirements). The M•1200
also has 1/4" TS phone jack
outputs in parallel with the
binding posts. The M•1400
comes with Neutrik brand
Speakon® connectors in par-
allel with the binding posts.
channel 2 positive speaker
output terminals.
Clipping eliminator.
Mackie Designs power
amplifiers use a method of
protecting the amplifier and
the speakers from clipping
that doesn’t affect the low
impedance capablility of the
amplifier. A defeatable limiter
circuit is em-
ployed that
reduces the
input signal
when the out-
through a
large intake
manifold into
the cooling
tunnel. The
cool air is
evenly dis-
tributed
Stereo, Mono and Bridge
modes.
The amplifiers can be oper-
ated in one of three modes.
In stereo mode, the amplifier
operates with two inputs and
two outputs. It accepts sepa-
rate channel 1 and 2 input
signals, and outputs separate
channel 1 and 2 signals.
In mono mode, the ampli-
put of the
amplifier ap-
proaches the
clipping point.
Cooling tunnel airflow
The moment the output
level drops below clipping,
the limiter turns off and is
effectively “out-of-circuit,”
from the middle of the tun-
nel to each end, where the
warm air then exits the
amplifier on either side.
3
Download from Www.Somanuals.com. All Manuals Search And Download.
Block Diagram
17.25" (43.8cm)
M•1200/1400
WEIGHT
36 lbs.
(16.3 kg)
M•1200/M•1400
DIMENSIONS
FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN
PROFESSIONAL POWER AMPLIFIER
CH
1
CH
2
CH
GAIN/dB
GAIN/dB
CH
OL
–3
OL
–3
3v
20
3v
20
1
2
INTERNAL STATUS
ON
18
22
18
22
2v
2v
16
14
24
26
28
–6
–9
–6
–9
16
14
24
26
28
PROTECT
SHORT
–20
–20
TEMP STATUS
CH
OFF
8
8
30
1
30
1v
1&
2
v
COLD
HOT
SENSITIVITY 1.23v (+4dBu)
SENSITIVITY 1.23v (+4dBu)
SIG
SIG
POWER
19.00" (48.3cm)
Built-in subwoofer crossover.
The amplifier has a sub-
woofer mode that allows you
to turn on the built-in sub-
woofer crossover. When
activated, the signals appear-
ing at the left and right inputs
are summed, directed to a
low-pass filter, and routed
to both output stages. A
switch selects the cutoff fre-
quency of the filter at either
63Hz or 125Hz, and the ampli-
fier can be set to either mono
or bridge mode of operation.
Built-in constant directivity
horn compensation.
When a compression driver
is attached to a constant
directivity (CD) horn, it requires
a certain amount of high-
4
Download from Www.Somanuals.com. All Manuals Search And Download.
frequency signals that the
loudspeaker cannot reproduce.
Each channel of the FR
to the speakers.
Separate left and right
Short LEDs indicate if there
Series amplifiers has a con- is a short circuit at the
tinuously variable low-cut
filter. Simply dial in the fre-
quency at which the loud-
speaker output terminals.
This lets you know at a glance
to check the speaker wiring
speakers drop off (anywhere for shorts (or recalculate the
from OFF to 170Hz), and
reap the benefits of saving
amplifier power with
cleaner, tighter bass.
Built-in subsonic stabilizer.
speaker load impedance)
right from the get-go, so you
don’t waste precious time
searching for the problem.
Combined left and right
Cold and Hot LEDs indicate
if the amplifier has overheated.
Under normal operation,
the Cold LED remains lit. If
the Hot LED should light,
the outputs become muted
until the amplifier cools to
a safe operating temperature,
then normal operation ensues.
frequency boost to compen-
sate for the natural roll-off
inherent in all compression
drivers. Some speaker manu-
facturers provide external
processors with plug-in
modules for each of the
various combinations of
horns and drivers (at an
additional cost to you!) to
compensate the CD horns.
Each channel of an FR
Series power amplifier has
its own built-in CD horn
compensation circuit. All you
need to do is set the variable-
frequency horn EQ control on
the amplifier to the manu-
facturer’s recommended mass
breakpoint frequency (the
point where the frequency
response begins to roll off).
As an added feature, if you’re
not using CD horns, set the
frequency control fully clock-
wise to the AIR setting to en-
joy Mackie’s exclusive AIR
EQ, a gentle high-frequency
boost that brightens and
lightens the sound.
Even with the low-cut
filter set to the OFF position,
each channel of the FR Series
amplifiers has a built-in
subsonic stabilizer (technically
called infrasonic stabilizer).
This dampens the very low
frequencies, which can be
caused by microphone
handling or stage rumble.
These frequencies are below
the threshold of human
hearing, and rob the amplifier
of power and contribute to
intermodulation distortion.
The FR Series: The most
affordable, full-featured
power amplifiers available.
As you can see, there is
every reason the M•1200
and M•1400 are fast becoming
the premier affordable choice
for many sound reinforcement
and recording applications.
With their proven durability,
professional features and
specs, and certainly not least,
low cost – the FR Series is
destined to be a classic.
There are no other power
amplifiers in their class with
all these features at such
an affordable price.
Protection circuits.
Both amplifiers are
equipped with a number of
unique and innovative protec-
tion circuits to ensure the
safety of your speakers and
the amplifiers.
Separate left and right
Protect LEDs on the front
panel indicate when a protec-
tion circuit has been activated.
For example, when the am-
plifier is first turned on the
outputs are muted for three
seconds, during which time
the Protect LEDs are lit. This
allows time for all the equip-
ment in the system to power
up and stabilize, and prevents
potentially damaging thumps
or pops from propagating
Low-cut filter.
And that’s why people
Virtually all loudspeakers
have a low-frequency cutoff
point somewhere above
20Hz. Many low-frequency
drivers have a –3dB point
at 35Hz to 40Hz, while many
stage monitor speakers cut
off at about 100Hz; there’s
no sense in amplifying low-
from all professions, with
all kinds of different applica-
tions, prefer Mackie’s FR Series.
You’ll like them because of
their low price, easy-to-use
features, and rugged construc-
tion. That’s got to sound good.
And, of course, Mackie does.
5
Download from Www.Somanuals.com. All Manuals Search And Download.
Frequency Response:
20Hz to 40kHz (+0, –1dB)
10Hz to 70kHz (+0, –3dB)
Limiter Section:
Complementary Positive and
Negative Peak Detecting
SPECIFICATIONS
Continuous Average Output
Power, both channels driven:
Indicators:
Six meter LEDs per channel
SIG (Signal Present),
–20, –9, –6, –3, OL (Overload)
CH 1 & 2
PROTECT LEDs
SHORT LEDs
TEMP STATUS
COLD, HOT LEDs
Distortion:
THD, SMPTE IMD, TIM
M•1200
225 watts per channel into
8 ohms from 20Hz to 20kHz, with
no more than 0.025% THD
400 watts per channel into
4 ohms from 20Hz to 20kHz, with
no more than 0.050% THD
600 watts per channel into
2 ohms from 20Hz to 20kHz, with
no more than 0.095% THD
< 0.025%@8Ω
< 0.050%@4Ω
< 0.150%@2Ω
Signal to Noise Ratio:
> 107dB below rated
power into 4 ohms
Channel Separation:
Power Consumption:
M•1200
65 watts at idle
500 watts with musical program
fully loaded 6.4A 3.2A
(4Ω per side, or 8Ω bridged)
850 watts with musical program
fully loaded
(2Ω per side, or 4Ω bridged)
> 80dB@1kHz
Bridged mono operation:
120V 240V
0.9A 0.5A
Damping Factor:
800 watts into 8 ohms from 20Hz
to 20kHz, with no more than
0.05% THD
1200 watts into 4 ohms from
20Hz to 20kHz, with no more
than 0.095% THD
Maximum Power at 1% THD (per
IHF-A-202):
250 watts per channel into 8Ω
425 watts per channel into 4Ω
640 watts per channel into 2Ω
850 watts into 8Ω bridged
> 350 from 0 to 400Hz
Input Impedance:
20kΩ balanced bridging
Input Sensitivity:
1.23 volts (+4dBu) for rated
power into 4 ohms
10.0A 5.0A
800 watts at full power into 8Ω
(cont. sine wave)
9.3A 4.7A
Gain:
1400 watts at full power into 4Ω
30.25dB (32.5V/ V)
(cont. sine wave) 15.0A 7.5A
Maximum Input Level:
2400 watts at full power into 2Ω
9.75 volts (+22dBu)
1280 watts into 4Ω bridged
(cont. sine wave) 24.3A 12.2A
M•1400
65 watts at idle
550 watts with musical program
fully loaded 6.7A 3.4A
(4Ω per side, or 8Ω bridged)
900 watts with musical program
fully loaded
(2Ω per side, or 4Ω bridged)
120V 240V
0.9A 0.5A
Rise Time:
< 4.4µs
M•1400
250 watts per channel into
8 ohms from 20Hz to 20kHz, with
no more than 0.012% THD
425 watts per channel into
4 ohms from 20Hz to 20kHz, with
no more than 0.025% THD
630 watts per channel into
2 ohms from 20Hz to 20kHz, with
no more than 0.050% THD
Slew Rate:
Voltage Slew Rate
> 100V/ µs bridged
Current Slew Rate
> 32A/ µs at 2Ω
CMRR: > 40dB, 20Hz to 20kHz
> 50V/ µs
10.5A 5.3A
850 watts at full power into 8Ω
Transient Recovery:
< 1µs for 20dB overdrive @ 1kHz
(cont. sine wave)
9.6A 4.8A
1500 watts at full power into 4Ω
Bridged mono operation:
High Frequency Overload and
Latching:
No latch up at any frequency or
level
(cont. sine wave) 15.6A 7.8A
850 watts into 8 ohms from 20Hz
to 20kHz, with no more than
0.025% THD
1260 watts into 4 ohms from
20Hz to 20kHz, with no more
than 0.050% THD
Maximum Power at 1% THD (per
IHF-A-202):
280 watts per channel into 8Ω
480 watts per channel into 4Ω
700 watts per channel into 2Ω
960 watts into 8Ω bridged
2500 watts at full power into 2Ω
(cont. sine wave) 24.8A 12.4A
AC Line Power:
Variable Low-Cut Filter:
10Hz (Off) to 170Hz,
2nd Order Bessel
US
120VAC, 60Hz
240VAC, 50/ 60Hz
100VAC, 50/ 60Hz
220VAC, 60Hz
Europe
Japan
Korea
Subwoofer Low-Pass Filter:
Switched: 63Hz/ 125Hz,
3rd Order Bessel
AC Drop-out Voltage:
At approximately 50% of rated
line voltage
Constant Directivity High
Frequency Boost:
2kHz to 6kHz (+3dB points)
6dB/ octave high-frequency
shelving filter, (shelving occurs at
approximately 30kHz)
Physical:
1400 watts into 4Ω bridged
Note: Power ratings are specified
at 120VAC (U.S. and Canada) and
240VAC (Export) line voltages.
Height:
Width:
Depth:
2U = 3.5" (89mm)
19.0" (483mm)
15.25" (387mm)
Handle Depth: 1.25" (32mm)
Overall Depth: 16.25" (413mm)
Power Bandwidth:
20Hz to 70kHz (+0, –3dB)
Turn On Delay:
3 seconds
Weight:
36 lbs (16.3kg)
Mackie Designs Inc. is engaged in a continuous
program of product evaluation and improvement
and reserves the right to change product
specifications at any time without notice.
®
®
The following are trademarks or registered
trademarks of Mackie Designs Inc.: “Mackie.”,
the Running Man, and FR Series.
Speakon is a registered trademark of Neutrik.
Part No. 091-096-00 Rev. B 2/ 98
MACKIE DESIGNS INC.
1997-1998 Mackie Designs Inc. All Rights
©
16220 Wood-Red Rd. NE , Woodinville • WA • 98072 • USA
Toll-Free 800/ 258-6883 • FAX 425/ 487-4337 •
For distribution information outside the USA,
425/ 487-4333 • FAX 425/ 485-1152
Reserved.
Download from Www.Somanuals.com. All Manuals Search And Download.
|