Q-Tech Q-Tech Commercial Series QTA-4060P/4120P 4 Channel Power Amplifiers User Manual QTA 4060P PUBLIC ADDRESS AMPLIFIER CH1 CH2 CH3 PROT PEAK SIGNAL POWER ON OFF CH4
Contents Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Front Panel Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Rear Panel Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . .
QTA-4060P/4120P User Manual Safety Precautions • Be sure to read the instructions in this section carefully before use. • Make sure you observe the instructions in this manual as the conventions of safety symbols and messages are very important. • We also recommend you keep this instruction manual handy for future reference. Safety Symbol and Message Conventions Safety symbols described below are used in this manual to prevent bodily injury and property damage which could result from mishandling.
QTA-4060P/4120P User Manual WARNING When Installing the Unit • Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing so may result in fire or electric shock. • Use the unit only with the voltage specified on the unit. Using a voltage higher than that which is specified may result in fire or electric shock. • Do not cut, kink, otherwise damage nor modify the power supply cord.
QTA-4060P/4120P User Manual CAUTION When Installing the Unit • Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock. • When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord itself. Operating the unit with a damaged power supply cord may cause a fire or electric shock. • When moving the unit, be sure to remove its power supply cord from the wall outlet.
QTA-4060P/4120P User Manual General Description With four separate power amplifiers in a single chassis and power ratings from 60 to120 watts RMS, these sleek, attractive units provide a compact solution for PA system amplification and distribution. Each channel has its own input and 4 ohm, 70V and 100V speaker outputs, so a wide variety of audio sources and speaker zones can be easily configured. Features • Rated outputs from 60W and 120W.
QTA-4060P/4120P User Manual Front Panel Layout QTA 4060P PUBLIC ADDRESS AMPLIFIER CH1 CH2 CH3 CH4 PROT PEAK SIGNAL POWER ON OFF 1 2 1. Power Switch On top of the opening Power Press the end, power shut down 2. (CH1) Volume Channel volume control 3. (CH2) Volume Channel volume control 4. Power Power indicator LED 5. (CH3) Volume Channel volume control 3 4 5 6 7 8 9 6. (CH3) Volume Channel volume control 7.
QTA-4060P/4120P User Manual Rear Panel Layout 1 2 OUTPUT 4 OUTPUT 3 3 4 5 6 7 8 OUTPUT 1 INPUT 4 INPUT 3 INPUT 2 INPUT 1 9 CLASS 2 WIRING MAY BE USED C /4/ 70V/100V C /4/ 70V/100V OUTPUT 2 C /4/ 70V/100V C /4/ • • • •• • • • •• • • •• •• • • 70V/100V BATT SUPPLY + DC24V - CAUTION T8AL 250V 10 RISK OF ELECTRIC SHOCK DO NOT OPEN N2388 ~240V 50Hz 11 1. Common Speaker Output 4 Connectors for 4 ohms or 70V and 100V speaker 2.
QTA-4060P/4120P User Manual Connections Speaker Connections Notes: • Both the 4Ω 70V/100V terminals cannot be used at the same time • Impedances indicated in the figures represent the total speaker system (load) impedances 7 WARNING Be sure to attach the supplied terminal cover after connection completion. Because high voltage is applied to the speaker terminals, never touch these terminals to avoid electric shocks.
QTA-4060P/4120P User Manual Applications QTA-4060P/QTA 4120P Rear Panel Connections 8 User Manual Q-Tech Commercial Series QTA-4060P/4120P
QTA-4060P/4120P User Manual Block Diagram 9 Q-Tech Commercial Series QTA-4060P/4120P User Manual
QTA-4060P/4120P User Manual Specifications 10 Model QTA4060P QTA4120P Rated Power Output 4X60W 4X120W Speaker Outputs 4Ω,70V/100V Outputs Noise <3mV Impedance 200:1 Input Sensitivity 775mV/0dB Frequency Response 50Hz~16KHz distortion<1.5Db S/N Ratio >15V/microsecond T.H.
QTA-4060P/4120P User Manual Dimensional Diagram UNIT: mm 11 Keep all the unit’s sides over 10cm away from objects that may obstruct air flow to prevent the unit’s internal temperature rising.
QTA-4060P/4120P User Manual Technical Notes voltage outputs (70V 100V) and a terminal at one end for the negative return wire (COM). Constant Voltage Distributed Speaker Systems Demystified In a typical paging and background music speaker installation, quantity loudspeakers are placed across a single amplifier in a parallel wiring configuration (see Fig 1.).
QTA-4060P/4120P User Manual 15% discrepancy can mean that a 100 watt system will only be able to power 7 or 8 x10 watt speakers safely. Be aware of this booby trap. Always plan to have 20% more power than you think you will need. 2. Incorrect output connection: If you accidentally connect your terminal strip on the amplifier to the 8 ohm output instead of the 100/70V line, you will have distortion and risk damaging the amplifier.. 3.
QTA-4060P/4120P User Manual High impedance of speakers and output calculation table for 100Volt systems Output 0.1W 0.5W 1W 2W 3W 5W Impedance 100KΩ 20KΩ 10KΩ 5KΩ 3.
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