Quick Start - Mackie M-800 Owner's Manual And Warranty Registration

QUICK START

INSTALLATION
If you connect lower impedance speakers, the
amplifier may overheat and shutdown.
DO NOT BLOCK THE VENTILATION PORTS.
The M•800 draws its ventilation air in from the
front and out through the side panels. It needs
plenty of fresh air to stay cool.
CONNECTIONS AND SETTINGS
1. Be sure the POWER
making connections.
2. Turn the GAIN
(counterclockwise) for now.
3. Set both LOW CUT FILTER
their TYPICAL marks (35Hz).
4. Set both CONSTANT DIRECTIVITY
switches OFF (unless you're using constant
directivity horns with compression drivers).
5. Turn the LIMITER
protection against clipping.
FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN
CH GAIN/dB GAIN/dB
1 SIG OL OL
3v
18 – –
3 3
16 20 16
2v
– –
14 22 6 6 14
– –
12 24 9 9 12
– –
20 20
6 26 6
CH STATUS
28
1v 1&2
1.23v (+4dBu)
SENSITIVITY SENSITIVITY
NORM HOT
4
You can mount the M•800
amp in any standard rack
system (see page 18), or
place it horizontally on a
floor or table.
Note: 4 ohms is the mini-
mum impedance you
should connect to the am-
plifier in BRIDGE mode
and 2 ohms is the mini-
mum per side for STEREO.
switch is off before
controls fully down
switch ON to provide
CH
2
3v
18
20
2v
22
24
26
28
1v
1.23v (+4dBu)
6. Determine which AMP MODE
for your application:
• STEREO mode (separate left and right
inputs, separate left and right outputs) is the
typical setup for amplifying stereo signals.
• MONO mode (sometimes called Dual-
Mono mode — one or two inputs, two
mono outputs) is for sending the same
signal to two different speakers, with
separately-adjustable level controls.
• BRIDGE mode (sometimes called
Bridged-Mono — one or two inputs, one
mono output) uses both sides of the amp to
power one speaker. An M•800 power
amplifier in BRIDGE mode delivers 800
watts (into 4 ohms).
7. In STEREO mode, connect line-level cables
from your mixer or preamplifier to the
INPUT
• The balanced XLR inputs are wired
pin 2 = hot (+)
pin 3 = cold (–)
pin 1 = shield (ground).
• The 1/4" TRS inputs are wired
tip = hot (+)
controls to
ring = cold (–)
sleeve = shield (ground)
They can accept either balanced (TRS) or
unbalanced (TS) cables.
• The XLR and TRS inputs for each
channel are internally wired in parallel.
8. In BRIDGE mode, connect an input cable
to CH 1 or CH 2 INPUT or both.
is best
jacks, either XLR or TRS:
PROFESSIONAL POWER AMPLIFIER
ON
OFF
POWER