Mackie UP4121 Parts list

UP 4000 Series

Power Amplifier

UP4121

AMPLIFIER

■ The UP4121 is designed for continuous duty in

speech, music, paging and sound reinforcement appli­cations in churches, schools, offices, arenas, hotel
meeting rooms, convention centers, recreation facili­ties and other venues demanding high performance,
flexible features and rugged dependability.

■ The UP4121 offers two discrete inputs with priority.

The main program input is actively balanced and termi­nated to a barrier strip connection on the rear panel.
The second input is unbalanced, and terminated to a
single RCA connector. A contact closure will give priori­ty to the balanced input. Activation of the balanced
input priority turns on 18Vdc (300mA) power at a barri­er connector on the rear panel, which may be used to
drive LEDs or relays. The unbalanced input features a
parallel output and 0/–20dB sensitivity switch.
12dB/octave Bass and Treble shelving equalization
with up to 12dB of boost or cut at 100Hz and 10kHz
can be applied to the output signal.

■ Output modes include 4Ω and 25V, 50V, 70V and

100V constant voltage. The output stage is fully pro­tected against permanent damage caused by overload­ing, shorts and extreme temperatures.

■ The UP4121 will operate on either 115 or 230VAC,

50/60Hz, supplied by a detachable IEC power cord.
Insulated terminals to connect a back up 24Vdc battery
are provided on the rear panel. Switchover to DC is
automatic. A programmable stand-by mode allows the
amplifier to be turned on remotely with a contact clo­sure.

■ The front panel provides a master volume control

and controls for the bass and treble shelving filters.
The control knobs can be easily removed for security
and the recessed shafts covered with inserts supplied
with the unit. LEDs indicate power, stand-by mode, sig­nal present at the output, peak and output overload.

■ Accessories include rack mounting ears.

■ All products from Mackie Industrial are covered by

our exclusive, one-time, NO FAULT repair policy in
addition to a five year limited warranty.

Features

■ 120 Watt RMS Convection Cooled

■ 4Ω - 25V - 50V - 70V - 100V Outputs

■ 2 Inputs w/ Priority

■ High-Pass/Low Pass Filters

■ 2 RU Rack Mounting Kit Included

■ Automatic 24Vdc Backup Power Input

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UP4121

APPLICATIONS

■ Foreground/Background Music Systems

■ Sound Reinforcement Systems

■ Paging Systems

■ Continuous-duty Applications

Power Amplifier

UP4121

AMPLIFIER

UP4121

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Specifications

Performance

Amplifier Power: 120W, nominal, 180W peak (10mS)
Frequency Response: 50Hz–15kHz ±3dB
Distortion: Less than 1% THD at 1kHz

nominal power

Noise: Better than 80dB

Equalization

Output: Treble shelving: ±12 dB at 10kHz,

Bass shelving: ±12 dB at 100Hz

Inputs: H-P filter: 12dB/oct. at 300Hz,

L-P filter: 12 dB/oct. at 7kHz

Audio Inputs

Line Level, Balanced: 775mV, 100kΩ, barrier connector
Line Level, Unbalanced: 775mV, 50kΩ or 80mV,

50kΩ, RCA connector

Audio Outputs

Number of Channels: One
Impedance: 4Ω
Constant Voltage: One each, 25V, 50V, 70V,

100V, barrier connectors

Line Level: Parallel to Unbalanced In, RCA connector

Control Inputs & Outputs

Outputs: Overload Indicator: 18Vdc (300mA)
Inputs: Priority Switch Input: Dry contact closure
Stand-by Switch Input: Dry contact closure,

barrier connectors

Controls

Front Panel: Power switch, master Volume,

Treble shelving, Bass shelving

Rear Panel: Unbalanced input sensitivity switch,

H-P Filter in/out switch,

L-P Filter in/out switch,

Mains Voltage Selector switch

Power Supply

115/230VAC (±5%), 50/60Hz, 450VA,

DC (24V battery) 10A/Hr

Environment

Maximum Ambient: 131°F (55°C),

Non-precipitating humidity

Physical

Dimensions (HxWxD): 3.46" x 17" x 12.4"

(88mm x 433mm x 315mm)
Weight: 30.5 lbs. (11.4kg)
Finish: Black painted or treated

steel, white nomenclature

Warranty

3 years, parts & labor

one-time, no-fault repair policy

Power Amplifier

UP4121

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ON

PEAK

SIGNAL

UP 4121 - P.A. AMPLIFIER

OVERLOAD

STD-BY

VOLUME

EQ

POWER

6

5

4

HIGH

LOW

0dB

20dB

SENSITIVITY

GND

max

OVERL.

300mA.

82

9

7

10

3

4

2

0

2

4

4

2

0

2

4

0

1

66

8

+10

-10

8

66

8

+10

-10

8

INPUT COMMANDS

GND

BY

STAND

PRIORITY GND

25V

4

0

PARALLEL OUT

IN

BALANCED

L.P.

FILTER

H.P.

MANUFACTURING DATE

SERIAL NUMBER

UNBALANCED IN

ON

OFF

POWER OUTPUTS

POWER OUTPUTS

D.C. FUSE

-

24V D.C.

POWER INPUT

+

0 50V 70V 100V

UTILISE UN FUSIBLE DE RECHANGE DE MÊ ME TYPE.

DEBRANCHER AVANT DE REMPLACER LE FUSIBLE

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT

RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR

WARNING:

EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER.

NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

AVIS:

CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE INDUSTRIAL • MADE IN ITALY • PATENTS PENDING • COPYRIGHT ©1999

DO NOT OPEN

CAUTION

REPLACE WITH THE SAME TYPE FUSE AND RATING.

DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE

RISK OF ELECTRIC SHOCK

THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "MACKIE INDUSTRIAL", & THE "RUNNING MAN" FIGURE

VOLTAGE

SELECTOR

LINE

50/60 Hz-115/230V

Power Amplifier

UP4121

AMPLIFIER

UP4121

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Architects’ and Engineers’ Specifications

The power amplifier shall have a nominal output power of
at least 120W RMS. It shall operate on 115VAC or 230VAC at
either 50Hz or 60Hz and have its source power supplied by a
detachable IEC power cord. In addition, the unit shall be
capable of being directly powered by a 24Vdc source such as
storage batteries. It shall have a power switch on the front
panel. The unit shall have a constant-impedance output to
drive a 4Ω load at its rated output. It shall also have 25V,
50V, 70V and 100V constant-voltage outputs with like per­formance. The unit shall be capable of being remotely turned
on from a stand-by mode with a contact closure.

The amplifier shall have an active balanced input and an
unbalanced input. The balanced input connection shall be
made through barrier connectors. The unbalanced input shall
have a sensitivity switch on the rear panel to select between
a nominal input signal of 0dB or –20dB. This input shall be
parallel to an unbalanced output connector. Unbalanced con­nections shall be made through RCA connectors. The unit
shall be capable of being connected to two different input
program sources. The balanced input shall be programmable
to completely exclude the unbalanced input when its priority
link is activated by a contact closure. The inputs shall be
equipped with a high-pass filter and a low-pass filter having
a response of 12dB/octave and fixed 300Hz and 7kHz,
respectively. Each of these filters shall be enabled by a
switch on the rear panel. An overload condition shall cause
an auxiliary voltage of 18Vdc at 300mA to be present at a
pair of terminals on the rear panel.

The unit shall have, on its front panel, continuously vari­able controls for master volume as well as bass and treble
shelving filters. The shelving filters shall have a range of
±12dB with the frequency for the bass fixed at 100Hz and the
treble fixed at 10kHz. LED status indicators shall be provided
on the front panel to indicate power, stand-by mode, signal
present at the output terminals, peak signals near clipping
and an overload condition. The amplifier shall be a model
UP4121 manufactured by Mackie Industrial.

www.mackieindustrial.com

16220 Wood-Red Rd. NE, Woodinville, WA 98072 USA

888.337.7404, fax [phone], [e-mail]

UK +44.1268.571.212, fax [phone], [e-mail]
ITALY +39.0522.354.111, fax [phone], [e-mail]
FRANCE +33.3.8546.9160, fax [phone], [e-mail]
GERMANY +49.2572.96042.0, fax [phone], [e-mail]

Electronic files for this product available at:
www.mackieindustrial.com

This Specification Sheet UP4121.PDF
Quick-Start Manual UP4121QS.PDF

Mackie Designs continually engages in research related to product improvement. New material, produc­tion methods, and design refinements are introduced into existing products withoutnotice as a routine
expression of that philosophy. For thisreason, any current Mackie Industrial product may differ in some
respect from its published description, but will always equal or exceed the original design specifications
unless otherwise stated. ©1999-2001 Mackie DesignsInc. All rights Reserved. and are
registered trademarks of Mackie Designs Inc. Mackie Industrial is a trademark of Mackie Designs Inc.

part no. 910-143-10 Rev.B