®
FEATURES
2/25/98
FAST RECOVERY SERIES HIGH CURRENT POWER AMPLIFIER
CHECK OUT OUR
WEBSITE
WWW.MACKIE.COM
■
“IN YOUR FACE”
ALL PRODUCT
BROCHURE
MORE INFORMATION
TM
■
Fast Recovery design
for improved tran-
sient response and
recovery from clip-
ping
■
Rack-mountable (2U)
with rear support
rails for extra support
■
Separate left and
right detented gain
controls, calibrated in
both dB and volts
■
Balanced XLR and
1/4" TRS input jacks
■
Balanced XLR thru
jacks
■
Heavy-duty binding
post output jacks in
parallel with 1/4" TS
output jacks
■
6 LED metering
including Signal
Present and Overload
■
Four levels of protec-
tion circuitry
1) Automatic turn-on
delay to prevent
thumps and pops
from reaching your
speakers
■
Subwoofer mode
switch with dual-
frequency select
(63Hz/125Hz)
■
T-Design Constant
Gradient Cooling
Tunnel uses two
short tunnels instead
of one long tunnel
for improved cooling
efficiency and output
device reliability
■
Dual-speed cooling
fan
■
Toroidal transformer
for reduced EMI
emissions
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 qual-
ity and more features than our competitors while
maintaining a comparable (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.
2) Short-circuit
protection with
separate L/R indicat-
ing LEDs
3) Thermal protection
with combined CH1
and CH2 Cold and Hot
indicating LEDs
4) SCR Crowbar DC
offset protection
■
Low-cut filter with
variable frequency
control (Off – 170Hz)
■
Infrasonic
1
stabiliza-
tion eliminates ultra-
low-frequency noise
caused by micro-
phone handling,
stage rumble
■
Constant directivity
horn compensation
with variable high-
frequency boost
control (2kHz to
6kHz)
■
Amp Mode switch for
Stereo, Mono, or
Bridge modes
■
Limiter to eliminate
clipping in both
channels
OL
–3
–6
–9
–2
0
–3
–6
–9
–2
0
SIG
OL
SIG
CH
1
30
28
26
20
22
18
24
16
14
8
0
0
1.23v (+4dBu)
SENSITIVITY
GAIN
/dB
CH
2
PROTECT
COLD
HOT
SHORT
TEMP STATUS
INTERNAL STATUS
CH
1
CH
2
CH
1&
2
ON
OFF
POWER
3v
2v
1v
30
28
26
20
22
18
24
16
14
8
0
0
1.23v (+4dBu)
SENSITIVITY
GAIN
/dB
3v
2v
1v
PROFESSIONAL
POWER
AMPLIFIER
FULL S
Y
MM
E
TR
Y
D
U
A
L DI
FFER
EN
TI
A
L
H
IGH
CUR
RE
N
T DE
SI
G
N
with Architects and
Engineers Specifications
1
a.k.a. Subsonic.
