[. . . ] 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 paralleled 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. [. . . ] AMPLIFIER STD-BY OVERLOAD SIGNAL PEAK ON EQ VOLUME HIGH 4 2 3 7 4 6 2 8 6 5 UP4161 Power Amplifier O FoF46 PAGES S PAGE LOW 2 2 4 66 8 8 1 9 0 10 -10 +10 -10 +10 8 8 4 4 6 0 2 0 POWER + POWER INPUT 24V D. C. D. C. FUSE POWER OUTPUTS POWER OUTPUTS INPUT COMMANDS - 0 50V 70V 100V 0 4 25V PRIORITY GND BALANCED IN FILTER SERIAL NUMBER MANUFACTURING DATE STAND GND OVERL. max PARALLEL OUT CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN VOLTAGE SELECTOR REPLACE WITH THE SAME TYPE FUSE AND RATING. DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. REFER SERVICING TO QUALIFIED PERSONNEL. WARNING: AVIS: RISQUE DE CHOC ELECTRIQUE -- NE PAS OUVRIR UTILISE UN FUSIBLE DE RECHANGE DE MÊME TYPE. UNBALANCED IN SENSITIVITY LINE 50/60 Hz-115/230V CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE INDUSTRIAL · MADE IN ITALY · PATENTS PENDING · COPYRIGHT ©1999 THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC. : "MACKIE" "MACKIE INDUSTRIAL" & THE "RUNNING MAN" FIGURE , , OFF ON 20dB 0dB AMPLIFIER UP4161 Power Amplifier Architects' and Engineers' Specifications The power amplifier shall have a nominal output power of 160W 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. The unit shall have a constant-impedance output to drive a 4 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. [. . . ] 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 UP4161 manufactured by Mackie Industrial. UP4161 Electronic files for this product available at: www. mackieindustrial. com This Specification Sheet Quick-Start Manual UP4161. PDF UP4161QS. PDF www. mackieindustrial. com 16220 Wood-Red Rd. NE, Woodinville, WA 98072 USA 888. 337. 7404, fax 425. 487. 4337, industrial@mackie. com UK +44. 1268. 571. 212, fax +44. 1268. 570. 809, info@rcf-uk. com ITALY +39. 0522. 354. 111, fax +39. 0522. 926. 208, industrial@rcf. it FRANCE +33. 3. 8546. 9160, fax +33. 3. 8546. 9161, rcf. commercial@wanadoo. fr GERMANY +49. 2572. 96042. 0, fax +49. 2572. 96042. 10, industrial@mackie. de Mackie Designs continually engages in research related to product improvement. [. . . ]