
COMMERCIAL AMPLIFIERS / MIXER AMPLIFIERS
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QSC CMX SERIES
POWER AMPS All models
drive low-impedance loads
down to 2 ohms and have barrier strip, XLR and 1/4" TRS inputs, Speakon™ and ter-
minal block outputs. Other features include recessed and detented 1dB gain controls
with security covers, as well as recessed rear DIP switches. All models can drive 70V
and 100V (CMX300VA is 70V only) systems in bridged mono mode while the 800 and 200
models can drive them in stereo mode (70V only on the 800). The amp section features
Class “AB” and Class “H” architecture, and all models also feature a high-current
toroidal transformer. All models offer DC current protection systems and automatic
current limiting to prevent damage from shorted inputs. All are 2RU tall, except for
the CMX2000VA (3RU tall).
MODEL 8
Ω
/ST 4
Ω
/ST 70V/ST DRCT DRIVE 70V DRCT DRIVE/BRGD MONO PRICE
CMX300VA...... 185W .......... 280W ................. N/A............................. 600W...................... 567.00
CMX500VA...... 260W .......... 400W ................. N/A............................. 1200W.................... 716.00
CMX800VA...... 450W .......... 650W ................. 400W .........................2000W.................... 979.00
CMX2000VA.... 1050W ........ 1600W ............... 2500W .......................5000W.................. 2059.00
STEWART AUDIO HALF-RACK AMPS
The AV50-2 has RCA inputs and will accept unbalanced signals (1/4" TRS). The AV25-2
offers RS232 control over volume, as well as music and fire alarm muting. The PA
amps are convection-cooled and provide clean power at a great price. With high
speed switching power supplies, ultra-efficient circuitry and balanced inputs.
ITEM DESCRIPTION PRICE
AV-25-2..................... Power amp, 25W @ 8Ω/35W @ 4Ω, pole-mountable ................ 179.00
AV-50-2..................... Power amp, 25W @ 8Ω/50W @ 4Ω, pole-mountable ................ 279.00
PA50B ....................... Power amp, 25W @ 8Ω/50W @ 4Ω ........................................... 339.00
RMK50....................... Rackmount kit for AV series, 1RU.................................................. 22.50
AV-POLE .................... AV Series pole mount .................................................................... 14.50
RMK-70-D ................. Rackmount kit for DA series, 2RU ................................................. 30.00
RMK-70-S.................. Rackmount kit for DA series, 1RU ................................................. 22.50
RMK100..................... Rackmount kit for PA series .......................................................... 22.50
AV-50-2
RADIO DESIGN LABS
HD-MA35/35U, HD-PA35/35U,
HD-RE35U STEREO POWER AMPS All
models feature master volume with remote
adjustment capability, selectable output
impedance, balanced inputs and amplified
outputs on terminal blocks, unbalanced
input and output via RCA jacks, an analog
compressor/ limiter for increased audio
fidelity, and more. HD-MA35U, PA35U, and
RA35U all use an adjustable automatic sleep mode to conserve energy (HD-PA35A
offers manual standby mode); HD-MA35, MA35U, and RA35U also feature manual/
automatic vocal priority ducking. RA35U supports remote control (sold separately)
via RJ45 jack. All models include power supply.
ITEM DESCRIPTION PRICE
HD-PA35 ................... 1-input, 35W, low impedance output .......................................... 206.12
HD-PA35A ................. As above, for 25V/70V/100V systems .......................................... 222.56
HD-PA35UA ............... As HD-PA35A, with sleep mode ................................................... 230.76
HD-MA35A ................. 3-input, 35W(zone 1)/2W(zone 2), ducking/muting ..................... 272.63
HD-MA35UA............... 4-input, 35W(zone 1)/4W(zone 2), sleep mode, ducking/muting . 336.41
HD-RA35U ................. 4-input, 35W(zone 1)/4W(zone 2), sleep mode, ducking/muting,
remote controllable ..................................................................... 324.36
HD-RA35UA ............... As above, for 70V/100V systems ................................................. 336.41
DS-RC3M................... Remote audio mixing control with mute function ........................ 139.01
RADIO DESIGN LABS
EZ-MXA20 MIXER AMP
A stereo
mixer amplifier with (1) XLR mic
input and (2) RCA line inputs. The
front panel has level controls for
each channel as well as bass and
treble controls. It is rated at 10W RMS per channel at with an 8Ω load. Other fea-
tures include phantom power and switchable speaker impedance (4Ω or 8Ω). The
optional TX-70A interface allows the EZ-MXA20 to be used with 70V systems, while the
TX-J2 can be used to sum stereo output to a single mono channel.
ITEM DESCRIPTION PRICE
EZ-MXA20 ................. Mixer/amp, 3-channel, 2x10W ..................................................... 222.56
TX70A ........................ Speaker level input interface ...................................................... 230.76
TXJ2........................... Unbalanced input transformer ...................................................... 56.69
RADIO DESIGN LABS EZ-PA20 AND
TX-PA40D STEREO POWER AMPS
EZ-PA40D offers 10W RMS per channel into
8Ω, and 8W RMS per channel into 4Ω. Features
include switch-selectable load impedance,
switch-selectable stereo/mono mode, and inte-
gral overload limiter with LED. TX-PA40D offers 20W
RMS per channel into 8Ω (40W total), and 15W RMS per
channel into 4Ω (30W total). Features include switch-
selectable stereo/mono operation, compressor/limiter,
LED to indicate audio compression threshold, thermal
and short-circuit protection. Includes power cord.
ITEM DESCRIPTION PRICE
EZ-PA20 .................... 20W stereo audio power amp with power supply......................... 127.14
TX-PA40D .................. 40W stereo audio power amp with power supply......................... 217.92
ROLLS PA202 STEREO 20W/
CHANNEL AMP This lightweight
and compact Class ‘D’ amp has 20W per channel stereo @ 4Ω, and 40W when in
bridge/mono mode @ 8Ω. The Class ‘D’ low-heat design enables it to be mounted
in very tight applications. Works great in ceilings with projectors, or anywhere small
and heat free amplification is required. Has an all-metal chassis and bottom mounts
are provided for permanent installations. It has an included 24VDC IEC laptop-type
external power supply.
ITEM DESCRIPTION PRICE
PA202 ....................... Stereo 20W/channel Class ‘D’ amp ............................................. 168.75
PA50B
QSC ISA SERIES
Available in either low
impedance versions and
25/70/100V versions. Housed
in a rugged 3-space rack-
mount chassis, features rear
controls, XLR and Euroblock
inputs and barrier strip for
outputs, selectable high pass
filters and variable speed fan.
The “TI” versions will drive both 4Ω/8Ω loads and high voltage distributed systems
on the same channel simultaneously.
ITEM 8Ω 4Ω 2Ω 70V PRICE
ISA280 ........................ 185W .................280W .................. 430W ................................... 474.00
ISA300TI ..................... 185W .................280W .................. 430W ...............300W ........... 633.00
ISA450 ........................ 260W .................425W .................. 700W ................................... 574.00
ISA500TI ..................... 260W .................425W .................. 700W ...............500W ........... 731.00
ISA750 ........................ 450W .................650W ................ 1200W ................................... 781.00
ISA800TI ..................... 450W .................650W ................ 1200W ...............800W ........... 953.00
ISA1350 ...................... 800W ...............1300W ................ 2000W .............1500W ......... 1475.00
ISA450
ISA450 REAR
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