O F 8 P A G E S
M•800
High-Current Power Amplifier
AMPLIFIER
M
•8
00
M•800
High-Current Power Amplifier
O F 8 P A G E S
AMPLIFIER
M
•8
00
www.mackie.com
16220 Wood-Red Road NE, Woodinville, WA 98072 USA
800.898.3211, fax 425.487.4337, [email protected]
UK
+44.1268.570.808, fax +44.1268.570.809, [email protected]
M•800
High-Current Power Amplifier
1
O F 8 P A G E S
AMPLIFIER
M
•8
00
O F 8 P A G E S
M•800
High-Current Power Amplifier
AMPLIFIER
M
•8
00
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 filters 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)
Applications
Live sound/music reinforcement for churches,
clubs, schools, conference centers, hotels
High level A/V playback
Large speech systems
(continued on page 8)
M
•
1400/M•1400i
Power Amplifiers, 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.
R E L A T E D P R O D U C T S
M•800
The Mackie M•800 is a dual channel, high output
power amplifier that incorporates a number of unique
features including FR “Fast Recovery” design, high con-
tinuous current output, and a T-Design constant-gradient
cooling tunnel for improved cooling efficiency and out-
put device reliability.
The M•800 is rated at a continuous output of 150
watts per channel into 8
Ω
, 225 watts per channel into
4
Ω
and 280 watts into 2
Ω
. In bridge mode the M•800
is rated at 450 watts into 8
Ω
and 560 watts into 4
Ω
.
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 helps eliminate clipping. Inputs are
balanced/unbalanced 1/4" and XLR, and XLR thru con-
nections 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 ver-
sion. An amp mode switch selects stereo, mono, or
bridge operation.
To effectively deal with clipping, an amplifier must be
able to recover almost instantaneously. That is the defi-
nition 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 tran-
sistor senses when the Baker Clamp is active and acti-
