Mackie FR Series M-1200 User manual

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®
1/16/97
FAST RECOVERY SERIES HIGH CURRENT POWER AMPLIFIERS
TM
1. GENERAL. The amplifier
shall have a free-standing
frame with front and rear
brackets for rack-mounting,
and supplied with four resil-
ient feet suitable for table-
top placement. The amplifier
shall be capable of two-
channel operation, with a
switch to place the amplifier
into single-channel operation
by bridging the outputs of
the two channels.
2. POWER OUTPUT.
M•1200: The power ampli-
fier, being of two channels,
shall deliver 225 watts RMS
into 8 ohms per channel,
400 watts into 4 ohms, and
600 watts into 2 ohms with
both channels operating. In
bridge-mode of operation it
shall deliver 800 watts RMS
into 8 ohms and 1200 watts
into 4 ohms.
M•1400: The power ampli-
fier, being of two channels,
shall deliver 250 watts RMS
into 8 ohms per channel,
425 watts into 4 ohms, and
630 watts into 2 ohms with
both channels operating. In
bridge-mode of operation it
shall deliver 850 watts RMS
into 8 ohms and 1260 watts
into 4 ohms.
3. POWER SUPPLIES. All
necessary operating voltages
for the amplifier shall be pro-
vided by an internal power
supply. A master power switch
shall be located on the front
panel along with a green
power-indicating light.
4. INPUT CHANNEL
CONNECTIONS. Each
monaural input channel
shall have an electronically
balanced line-level input,
accommodating a nominal
line level between –10dBV
and +4dBu, and appearing
on the rear panel as a female
XLR-3 type connector. In
addition, each monaural
input channel shall have a
parallel 1/4" TRS phone
jack and a male XLR-3 type
connector, which can be
used as inputs or “thru”
jacks for daisy-chaining the
input signal to another
amplifier. Pin 2 of the XLR
connectors, and the tip of
the 1/4" TRS phone jack,
shall be non-inverting.
5. INPUT CHANNEL LEVEL
CONTROLS. Each monaural
input channel shall be
equipped with a gain control
appearing on the front panel,
each having 40 detent
positions, and calibrated in
dB and volts.
6. FRONT PANEL INDICA-
TORS. Each channel shall
have an associated six-seg-
ment LED meter appearing
on the front panel, capable
of displaying signal present,
–20dB, –9dB, –6dB, –3dB,
and overload. Each channel
shall have internal status
LEDs appearing on the front
panel to indicate activation
of protect mode and short-
circuit protection. Two tem-

perature status LEDs shall
appear on the front panel,
one to indicate normal opera-
tion (COLD) and one to indi-
cate thermal protection (HOT).
7. PROTECTION FEATURES.
The amplifiers shall provide
delayed activation of the
outputs at turn-on. Each
channel shall have a short-
circuit protection circuit for
detecting excessive current
flow at the output that, when
activated, mutes the output
for four seconds. The short-
circuit protection shall con-
tinuously cycle on and off
until the shorted condition
is remedied. The amplifier
shall have a thermal protec-
tion circuit to protect the
power devices from over-
temperature operation. The
circuit shall activate when
the internal temperature
crosses the safe-operating
threshold and, when activated,
mute the outputs until the
internal temperature cools
to a safe-operating tempera-
ture, at which time the ampli-
fier shall resume normal
operation. The amplifier
shall have a fan to cool the
heat-producing internal
components. The fan shall
operate at two speeds, the
speed being determined by
the internal temperature and
the signal level present at
the output. The amplifier
shall have an SCR crowbar
circuit to protect the speak-
ers against a catastrophic
amplifier failure. The circuit
shall activate in the pres-
ence of continuous DC at
the speaker outputs, and
shall shut the amplifier
down by turning off the
high-voltage rails.
8. OUTPUT CONNECTIONS.
M•1200: Each channel shall
have heavy-duty 5-way bind-
ing post speaker output
connectors appearing on
the rear panel, with 3/4"
spacing for accommodating
standard double banana
plugs as well as spade lugs
or bare wires. Each channel
shall have a 1/4" TS phone
speaker output jack appearing
on the rear panel in parallel
with the binding post output.
M•1400: Each channel shall
have heavy-duty 5-way bind-
ing post speaker output
connectors appearing on
the rear panel, with 3/4"
spacing for accommodating
standard double banana
plugs (120V versions only)
as well as spade lugs or
bare wires. Each channel
shall have a Neutrik brand
Speakon®speaker output
jack appearing on the rear
panel in parallel with the
binding post output.
9. AMP MODES. The ampli-
fier shall have a three-way
switch appearing on the
rear panel for selecting the
mode of operation, which
shall include stereo (two
channels in, two channels
out), mono (one channel
in, two channels out), and
bridge (one channel in, one
channel out bridged between
both speaker outputs).
10. OUTPUT APPLICATION.
The amplifier shall have a
three-way switch appearing
on the rear panel for selecting
between limiter on, limiter
off, and subwoofer mode.
The defeatable electronic
limiter circuit shall sense
the onset of clipping and
shall limit the input signal
and thereby prevent the
output from clipping. The
amplifiers shall have a two-
way switch appearing on the
rear panel for selecting be-
tween a 63Hz and 125Hz
low-pass cutoff frequency
when subwoofer mode is
selected.
11. LOW-CUT FILTER. Each
channel shall have a low-cut
filter with a variable frequency
control appearing on the
rear panel covering a range
of 10Hz (OFF) to 170Hz.
12. CONSTANT DIRECTIVITY
HORN EQ. Each channel
shall have a two-way switch
appearing on the rear panel
for selecting a constant
directivity horn equalization
circuit. When selected, this
circuit shall provide a 6dB
per octave high frequency
boost. The EQ shall have a
variable frequency control
appearing on the rear panel
covering a range of 2kHz to
6kHz. The 6kHz position
shall be called AIR.
13. PHYSICAL CONFIGU-
RATION. The amplifier shall
be rack-mountable with
rear support rails for extra
support, and shall have a
steel chassis frame painted
grey-black. The amplifier
shall be 19" wide, 3.5" tall
(2U) and 15.25" deep, and
shall weigh 36 pounds.
®

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14. OVERALL MINIMUM
SPECIFICATIONS. In addition
to specifications previously
cited, the amplifier shall
meet or exceed the follow-
ing performance criteria:
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
Bridged mono operation:
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 8Ωbridged
1400 watts into 4Ωbridged
Power Bandwidth:
20Hz to 70kHz (+0, –3dB)
Frequency Response:
20Hz to 40kHz (+0, –1dB)
10Hz to 70kHz (+0, –3dB)
Distortion:
THD, SMPTE IMD, TIM
< 0.025%@8Ω
< 0.050%@4Ω
< 0.150%@2Ω
Signal to Noise Ratio:
> 107dB below rated
power into 4 ohms
Channel Separation:
> 80dB@1kHz
Damping Factor:
> 350 from 0 to 400Hz
Input Impedance:
20kΩbalanced bridging
Input Sensitivity:
1.23 volts (+4dBu) for
rated
power into 4 ohms
Gain:
30.25dB (32.5V/V)
Maximum Input Level:
9.75 volts (+22dBu)
Rise Time: < 4.4µs
Slew Rate:
Voltage Slew Rate > 50V/µs
> 100V/µs bridged
Current Slew Rate
> 32A/µs at 2Ω
Continuous Average Output Power,
both channels driven:
®
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
Bridged mono operation:
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 8Ωbridged
1280 watts into 4Ωbridged
Note: Power ratings are specified at
120VAC (U.S. and Canada) and
240VAC (Export) line voltages.
TM

MACKIE DESIGNS INC.
16220 Wood-Red Road NE
• Woodinville, WA 98072 USA
Toll-Free 800/258-6883 • FAX [phone]
Outside the U.S., Phone [phone] • FAX [phone]
®
4
4
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. 091-097-00 Rev. B 2/98.
©1997-1998 Mackie Designs Inc. All Rig/hts Reserved.
CMRR:
> 40dB, 20Hz to 20kHz
Transient Recovery:
< 1µs for 20dB overdrive
@ 1kHz
High Frequency Overload
and Latching:
No latch up at any frequency
or level
Variable Low-Cut Filter:
10Hz (Off) to 170Hz,
2nd Order Bessel
Subwoofer Low-Pass
Filter:
Switched: 63Hz/125Hz,
3rd Order Bessel
Constant Directivity High
Frequency Boost:
2kHz to 6kHz (+3dB points)
6dB/octave high-frequency
shelving filter, (shelving occurs
at approximately 30kHz)
Turn On Delay:
3 seconds
Limiter Section:
Complementary Positive
and Negative Peak Detecting
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
TM
Power Consumption:
M•1200 120V 240V
65 watts at idle 0.9A 0.5A
500 watts with musical
program fully loaded
(4Ωper side, or 8Ωbridged)
6.4A 3.2A
850 watts with musical
program fully loaded
(2Ωper side, or 4Ωbridged)
10.0A 5.0A
800 watts at full power
into 8Ω(cont. sine wave)
9.3A 4.7A
1400 watts at full power
into 4Ω(cont. sine wave)
15.0A 7.5A
2400 watts at full power
into 2Ω(cont. sine wave)
24.3A 12.2A
M•1400 120V 240V
65 watts at idle 0.9A 0.5A
550 watts with musical
program fully loaded
(4Ωper side, or 8Ωbridged)
6.7A 3.4A
900 watts with musical
program fully loaded
(2Ωper side, or 4Ωbridged)
10.5A 5.3A
850 watts at full power
into 8Ω(cont. sine wave)
9.6A 4.8A
1500 watts at full power
into 4Ω(cont. sine wave)
15.6A 7.8A
2500 watts at full power
into 2Ω(cont. sine wave)
24.8A 12.4A
AC Line Power:
US 120VAC, 60Hz
Europe 240VAC, 50/60Hz
Japan 100VAC, 50/60Hz
Korea 220VAC, 60Hz
AC Drop-out Voltage:
At approximately 50% of
rated line voltage
Physical:
Height: 2U = 3.5" (89mm)
Width: 19.0"(483mm)
Depth: 15.25" (387mm)
Handle Depth:1.25" (32mm)
Overall Depth:16.25"(413mm)
Weight: 36 lbs (16.3kg)
15. DESIGNATION.
The power amplifier
shall be a Mackie Designs
(M•1200, M•1400).
®