Mackie M 800 Parts list
M•800
M•800
The Mackie M•800 is a dual channel, high output
power amplier that incorporates a number of unique
features including FR “Fast Recovery” design,
tinuous current output, and a T-Design constantcooling tunnel for improved cooling efciency and output device reliability.
The M•800 is rated at a continuous output of 150
watts per channel into 8Ω, 225 watts per channel into
4Ω and 280 watts into 2Ω. In bridge mode the M•800
is rated at 450 watts into 8Ω and 560 watts into 4Ω.
Variable low-cut lters 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 helps eliminate clipping. Inputs are
balanced/unbalanced 1/4" and XLR, and XLR thru connections allow the full-range signal to be routed to
another M•800. Speaker connections on the M•800
are 1/4" and binding posts for the U.S. version, and
Speakon® and binding posts for the international version. An amp mode switch selects stereo, mono, or
bridge operation.
To effectively deal with clipping, an amplier must be
able to recover almost instantaneously. That is the denition of “Fast Recovery.” Rather than using negative
feedback to help control clipping distortion, the M•800
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 acti-
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high con-
gradient
High-Current Power Amplier
Features
800 watts max, 560 watts continuous @ 4 ohms bridged
Ultra-low-noise/low-distortion design
Fast Recovery circuitry reduces distortion at clipping
Two 2nd order, 12 dB/octave, Bessel low-cut lters with
variable frequency from Off to 170Hz
Constant directivity horn EQ/Air EQ with variable frequency
from 2kHz to 6kHz and on/off switch
Limiter with on/off switch
Balanced/unbalanced 1/4" and XLR inputs
XLR thru outputs
1/4" jacks (Speakon® connectors on international version)
and 5-way binding post outputs (both models)
Detented gain controls calibrated in dB and volts
Signal present and OL LEDs
Channel Status LEDs
Superior T-Design cooling
Five-year, limited warranty (U.S. only)
AMPLIFIER
M•800
R E L A T E D P R O D U C T S
M•1400/M•1400i Power Ampliers, 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.
Applications
Live sound/music reinforcement for churches,
clubs, schools, conference centers, hotels
High level A/V playback
Large speech systems
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O F 8 P A G E S
M•800
High-Current Power Amplier
M•800 Specications
AMPLIFIER
Maximum Power, mid band (@ 1kHz with 1% THD):
175 watts per channel into 8 ohms
275 watts per channel into 4 ohms
400 watts per channel into 2 ohms
550 watts into 8 ohms bridged
800 watts into 4 ohms bridged
Continuous Sine Wave Average Output Power, both
channels driven (FTC power rating 40Hz - 20kHz):
M•800
150 watts per channel into 8 ohms from 40Hz to
20kHz, with no more than 0.025% THD
225 watts per channel into 4 ohms from 40Hz to
20kHz, with no more than 0.05% THD
280 watts per channel into 2 ohms from 40Hz to
20kHz, with no more than 0.1% THD
Bridged mono operation:
450 watts into 8 ohms from 40Hz to 20kHz, with no more than
0.05% THD
560 watts into 4 ohms from 40Hz to 20kHz, with no more than
0.1% THD
Power Bandwidth:
20Hz to 70kHz (+0, –3 dB)
Frequency Response (1 watt, 8 ohm load):
20Hz to 40kHz (+0, –1 dB)
10Hz to 70kHz (+0, –3 dB)
Rise Time:
<5µs
Slew Rate:
Voltage Slew Rate >40V/µs
>80V/µs bridged
Current Slew Rate >20A/µs at 2 ohms
CMRR:
>40 dB, 20Hz to 20kHz
Load Angle:
8(±jx) time independent at 8Ω
4(±jx) time dependent, T >6 min. at 4Ω
2(1±jx) time dependent, T >2 min. at 2Ω
Transient Recovery:
<1µs for 20 dB overdrive @ 1kHz
High-Frequency Overload and Latching:
No latch up at any frequency or level
High-Frequency Stability:
Unconditionally stable driving any reactive or capacitive load
Turn On Delay:
3-4 seconds
Variable Low-Cut Filter:
10Hz (Off) to 170Hz, 2nd Order Bessel
Distortion:
THD, SMPTE IMD, TIM (250mW to rated power)
<0.025% @ 8 Ω
<0.05% @ 4 Ω
<0.15% @ 2 Ω
Signal-to-Noise Ratio:
>104 dB below rated power into 4 ohms
Channel Separation:
>70 dB @ 1kHz
Damping Factor:
>250 @ 400Hz
Input Impedance:
20kΩ balanced bridging
Input Sensitivity:
1.23 volts (+4 dBu) for rated power into 4 ohms
Voltage Gain:
28.0 dB
Maximum Input Level:
9.75 volts (+22 dBu)
Constant Directivity High-Frequency Boost:
2kHz to 6kHz (+3 dB points)
6 dB/octave high-frequency shelving lter,
(shelving occurs at approximately 30kHz)
Limiter Section:
Complementary Positive and Negative Peak Detecting
Indicators:
5 meter LEDs per channel
–20, –9, –6, –3, OL (Overload)
TEMP STATUS
NORMAL/HOT LEDs
Power Consumption:
55 watts at idle
400 watts with musical program fully loaded
(4 ohms per side, or 8 ohms bridged)
600 watts with musical program fully loaded
(2 ohms per side, or 4 ohms bridged)
550 watts at rated power into 8 ohms
(continuous sine wave)
950 watts at rated power into 4 ohms
(continuous sine wave)
1500 watts at rated power into 2 ohms
(continuous sine wave)
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O F 8 P A G E S
M•800
19.00" (48.3cm)
17.25" (43.8cm)
15.25" (38.7cm)
3.50"
(8.9cm)
2U
16.25" (41.3cm)
High-Current Power Amplier
AC Line Power:
US 120 VAC, 60Hz
Europe 240 VAC, 50/60Hz
Japan 100 VAC, 50/60Hz
Korea 220 VAC, 60Hz
AC Drop-out Voltage:
At approximately 65% of rated line voltage
Physical:
Height 3.50" (89 mm)
Width 19.00" (483 mm)
Depth 15.25" (387 mm)
Overall Depth 16.25" (413 mm)
Weight 28 lbs (12.7 kg)
O F 8 P A G E S
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