Mackie UP4161, UP4121, UP4061 instruction manual Introduction, Key Features

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.

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

Part No. 910-142-30 Rev. A 10/01

© 2001 All Rights Reserved. Mackie Industrial. Printed in U.S.A.

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