User Manual MODEL: QM 450A
Contents Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Connection Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 System Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Flying the QM450A . . . . . . . . . . . . . . . . . . . . . . . . .
QM450A 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.
QM450A User Manual WARNING When Installing the Unit 2 • Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock. • Do not place objects on the unit as they can dislodge and cause personal injury and/or property damage. • 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.
QM450A User Manual General Description The QM450a powered speaker is a two way active bass reflex design suitable for mobile and installation use. Temporary installation is possible with the Addition of a 35-36 mm speaker stand. Wall mounting in the vertical and horizontal plane is possible with WB350i wall mounting kit. Installation Hybridtec Amplifier Technology The amplifier power is supplied by Quest Engineering’s new “Hybridtec” digital class D and analogue class A/B amplifier system.
QM450A User Manual Connection Panel 1 Input Volume Control 2 High Pass Filter 3 Active and Clip Indicators 4 Line Level XLR Output 5 Line Level XLR Input 6 115V/230V Voltage Input Selector 7 Protection Fuse 8 Power ON/OFF Switch 9 Power Supply Input 1 2 3 110Hz HIGH PASS 4 5 Make sure voltage selector is set for your country’s correct voltage. 4 CAUTION: Use only same fuse replacement. Please consult your Quest Engineering service agent.
QM450A User Manual System Connections As a mono stand-alone system If a powered sub bass is to be added to the system, it is possible to switch the 110Hz high pass on to remove the low bass frequencies from the QM450A. This will give a “cleaner” vocal sound and make more power available for voice reproduction. As part of a multi way powered system If your powered sub bass system has an electronic crossover output.
QM450A User Manual Speaker Placement as a Single Box or in Arrays The QM450A is intended for use as a single speaker system or as part of a multiple speaker setup with or without sub bass reinforcement. It can also be installed in small arrays of up to three boxes per array for very wide coverage applications. When a group of point source 90 degree speaker boxes are placed together, it is possible to have “interference effect” between some of the boxes causing uneven frequency response.
QM450A User Manual Flying the QM450A Before suspending any speaker system always inspect all components (enclosure, rigging frames, track fittings, etc.) for cracks, deformations, corrosion, missing, loose or damaged parts that could reduce strength and safety of the array. Do not suspend the speaker system until the correct preparation of the installation site has been taken to avoid health risks during and after the completion of the installation.
QM450A User Manual QM450A Wave Guide Examples 45˚ +15˚ -45˚ 60˚ QM450A FOH Configuration (front) QM450A FOH Configuration (side) -45 60˚ 8 ˚ +15 ˚ 45˚ QM450A Foldback Configuration (front) QM450A Foldback Configuration (side) 45˚ +15˚ 60˚ QM450A Horiztonal Configuration (front) User Manual Q Motion Series QM450A -45˚ QM450A Horizontal Configuration (front)
QM450A User Manual QM450A Specifications Level (dB) 110 105 100 95 90 85 80 75 70 65 60 20 50 100 200 500 1k 2k QM450A - Frequency Response - 1W, values scaled 5k 10k 20k Frequency Response (Hz) 9 Technical Parameters Power Amplifier Module Output 450 / 400+50 W RMS Frequency Response 60 – 18 kHz (+/-3dB) Maximum SPL output @ 1m 129.
QM450A User Manual QM450A Reference Diagram 4 5 6 3bis 3 7 10 2 2bis 1 8 9 Item Identification Spare Part 1 QM450A wooden cabinet QM350C 2 12” medium power woofer T12001 2bis Recone kit for 12” woofer RT12001 3 1” exit ferrite compression driver T1012 3bis Replacement diaphragm for T1012 RT1012 4 Asymmetrical horn-flare HWG350 5 Complete grill for QM350i/QM450A HGQM350 6 Complete power module for QM450A APM450A 7 Q-badge 25mm with spring loaded pin HQB25 8 137mm rubbe
QM450A User Manual 11 Q Motion Series QM450A User Manual
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