User manual MARTIN AUDIO AQ28 SCHEMATICS

[. . . ] Never stand close to loudspeakers driven at high level. 3. 1 Pole or stand mounting The AQ28 incorporates a pole mounting ("top hat") sockets in the foot so that it may be pole or stand mounted. When using poles or stands, the following precautions are advised: Ensure that the stand will support the weight of the speaker by checking the stand manufacturers rating. Make sure that the stand is placed on a level surface and that its legs are fully extended Do not place more than one speaker on each stand Run cables so that they do not present a trip hazard which could pull the speaker over When used outdoors in the wind, it may be necessary to add some weight to the base of the stand When using a pole mount with a sub-bass system, observe similar precautions. All material © 2008. [. . . ] System stability relies on the whole front width of the AQ28 ­ not just it's central foot Outdoor systems ­ or systems accessible by the audience ­ must be strapped down for safety Be aware that speakers producing very high power levels can vibrate, move or creep. Again, strapping will keep things safe 3. 3 Yoke assembly A yoke assembly (Martin Audio ASF20025) is available for easy suspension. WARNING: Suspending the system should only be done by qualified personnel following safe rigging practices. Seek help from architects, structural engineers or other specialists if in any doubt. ASF20025 Yoke assembly & fitting Assemble the yoke assemblies as follows. . . Important Note: The yoke mounting point bolts must be removed in order to fit the yoke assembly. Always ensure that these bolts are replaced securely when the yoke is not in use. Cabinet fittings All material © 2008. Subject to change without notice. a) Fit the clamping plate assemblies to the left and right yoke arms as illustrated. Clamping plates fitted to left & right yoke arms. b) Fit the yoke arms to the yoke before bolting them to the AQ28. Ready to fit dome nut & thumbwheel All material © 2008. Subject to change without notice. Dome nut & thumbwheel fitted c) Remove the yoke mounting bolts (see earlier) from the AQ28 cabinet and fit the yoke assembly. Note that the yoke arm follows the AQ28 front curvature All material © 2008. Subject to change without notice. The yoke may be turned upside down for an alternative tilt angle range. . . Alternative orientation 4 Aiming for best coverage The AQ28 is designed for medium coverage ­ up to 25m distance x 100deg (120deg in the nearfield). Height The AQ28 should always be mounted so that the bottom/foot is about 1m above near-field listener headheight (or 1m above front balcony listener level when used for a balcony fill) for the differential coverage to work correctly. Nearfield attenuation Note that the rear panel attenuation switch may be switched to -3dB if the nearfield audience is particularly close. Nearfield attenuation switch All material © 2008. Clipping not only sounds unacceptable but can seriously stress your system by dumping large amounts of distortion into the high frequency drivers - especially in passive mode. Controllers The AQ28 must be used with a Martin Audio DX1. 5, DX2 or Engineer controller system to ensure correct operation and protection. DX1. 5 (New for November 2008) 2 input, 6 output digital loudspeaker management system The DX1. 5 is a powerful 2in-6out DSP based audio processing unit for live applications and fixed installations. The unit is configurable using its versatile 2input ­ 6output routing matrix. Each input has adjustable gain, delay and equalisation. Each output consists of a high and low pass filter, parametric equalisaton, limiter, delay, gain and polarity controls. DX2 4 input, 8 output digital loudspeaker management system The 4in-8out DX2 embraces the very latest advances in technology to meet the ever increasing demand and expectations placed on professional audio systems. Based on a completely new processing platform, running at 96kHz, the DX2 sets a new standard in terms of performance, flexibility and ease of use. The DX2 is a comprehensive digital loudspeaker management system, capable of being easily configured to meet the most demanding applications in both fixed installation and live touring environments. It is fully compatible with XTA's AudioCore remote control system. Engineer Installed system digital management processor The Martin Audio Engineer 4in/8out and 8in/8out digital management processors provide comprehensive control and management of installed loudspeaker systems. In addition to crossover, EQ and limiter functions, Engineer processors offer a flexible event scheduler, automatic programme level and tonality control to compensate for variations in programme sources and a unique psycho-acoustical BassCreator algorithm. BassCreator is capable of extending the perceived range of small loudspeakers 1 to 1½ octaves below the resonance frequency of a loudspeaker without overloading the loudspeaker and without creating sub-sonic sound leakage. See the following pages for DX1. 5 and DX2 preset parameters. . . All material © 2008. [. . . ] Subject to change without notice. Contact your Martin Audio distributor or visit www. martin-audio. com for the latest AQ28 presets ­ available in spreadsheet, binary and XTA AudioCore formats. All material © 2008. Subject to change without notice. 6 Connections Active/Passive operation AQ28s may be operated in Active (3way bi-amplified) or Passive (3way passive) mode. Rear panel showing Active/Passive switch, pinout & nearfield attenuator switch The AQ28 connector panel has two Neutrik Speakon connectors wired in parallel. The second connector allows use of a short link lead to power another AQ28 loudspeaker for wider horizontal coverage. [. . . ]