Introduction; Key Features - Mackie UP4061 Instruction Manual

2. INTRODUCTION

The UP4000 Series Power Amplifiers are
designed for continuous duty in speech, music,
paging, and sound reinforcement applications in
churches, schools, offices, and other venues
demanding high performance, flexible features, and
rugged dependability.
Two discrete inputs with priority are provided.
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 by muting the
unbalanced input. The unbalanced input features a
parallel output and 0 dB/20 dB sensitivity switch.
Output modes include 4Ω constant impedance
and 25V, 50V, 70V, and 100V constant voltage. The
smart output stage is fully protected against
permanent damage caused by overloading, shorts,
and extreme temperatures. Activation of the
overload protection circuit turns on 18 VDC (300mA)
power at a barrier connector on the rear panel, which
may be used to drive a relay or indicating LED. The
UP4000 Series will operate on either 115 VAC or
230 VAC, 50/60Hz, as determined by the Voltage
Selector switch, and supplied by a detachable IEC
power cord. Insulated terminals to connect a backup
24 VDC 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 Low and High EQ controls. The control knobs
can be removed for security, and their recessed
shafts covered with the supplied inserts. LEDs
indicate power, stand-by mode, signal present at
the output, peak, and output overload. 12 dB/octave
Low and High shelving equalization with up to 12 dB
of boost or cut at 100Hz and 10kHz can be applied
to the output signal.
Accessories include a rack mounting kit.
Part No. 910-142-30 Rev. A 10/01
© 2001 All Rights Reserved. Mackie Industrial. Printed in U.S.A.

KEY FEATURES

• Balanced and Unbalanced Inputs
• Balanced Input Priority Function
• Unbalanced Line-Level Output
• Convection Cooled Power Amplifier
UP4061: 60 Watts RMS
UP4121: 120 Watts RMS
UP4161: 160 Watts RMS
• 4Ω Constant-Impedance Output
• 25V, 50V, 70V, and 100V Constant-Voltage Outputs
• High-Pass and Low-Pass Filters
• 2 RU Rack-Mounting Kit
• Automatic 24 VDC Backup Power Input
UP4000 – 3