User manual MARTIN AUDIO AS118 SCHEMATICS

[. . . ] Martin Audio Limited will not, however, be held responsible for the consequences of any errors or omissions. Technical specifications, weights and dimensions should always be confirmed with Martin Audio Limited before inclusion in any additional documentation. In our efforts to develop and improve our products we reserve the right to change the technical specification of our products without notice. Martin Audio Limited tries, whenever possible, to minimise the effects of product changes on equipment compatibility. All material © 2007. [. . . ] Subject to change without notice. 5. 5. 23 System control and Band-zoning Rack patching ViewPoint's Processor page recommends suitable controller presets for the line array configuration being plotted. These controller presets ensure that larger line arrays are correctly band-zoned. It is important that racks are correctly patched. AS118 or Longbow amplifier rack patch Standard AS118 Longbow presets configure Martin Audio DX1 or XTA DP226 outputs for the following controller-to-amplifier patches: DX1 o/p 6 Upper HF 5 Middle HF 4 Lower HF 3 Upper MF 2 Lower MF 1 All LF 4xAS118/ 6xAS118/ 8xAS118/ Longbow Longbow Longbow Upper 2 HF Upper Upper 4 Middle 2 HF HF 4 HF Lower Lower Lower 2 HF 2 HF 2 HF Upper Upper 2 MF 4 MF All MF Lower Lower 4 MF 4 MF All LF All LF All LF 10xAS118/ Longbow Upper 4 HF Middle 4 HF Lower 2 HF Upper 6 MF Lower 4 MF All LF 12xAS118/ Longbow Upper 6 HF Middle 4 HF Lower 2 HF Upper 8 MF Lower 4 MF All LF 14xAS118/ Longbow Upper 8 HF Middle 4 HF Lower 2 HF Upper 10 MF Lower 4 MF All LF 16xAS118/ Longbow Upper 10 HF Middle 4 HF Lower 2 HF Upper 12 MF Lower 4 MF All LF Note that AS118 Longbow and AS118C band zoning is from the bottom upwards as follows: Mid frequencies Bottom 4 cabinets in the lower zone The rest of the cabinets in the upper zone High frequencies Bottom 2 cabinets in the lower zone Up to 4 cabinets in the middle zone The rest of the cabinets in the upper zone AS118C amplifier rack patch Standard AS118C presets configure Martin Audio DX1 or XTA DP226 outputs for the following controller-to-amplifier patches: All material © 2007. Subject to change without notice. DX1 o/p 6 Upper HF 5 Middle HF 4 Lower HF 3 Upper MF 2 Lower MF 1 All LF 4x AS118C 6x AS118C Upper 2 HF Lower 2 HF All MF All LF Upper 4 HF Lower 2 HF Upper 2 MF Lower 4 MF All LF 8x AS118C Upper 2 HF Middle 4 HF Lower 2 HF Upper 4 MF Lower 4 MF All LF 10 x AS118C Upper 4 HF Middle 4 HF Lower 2 HF Upper 6 MF Lower 4 MF All LF 12 x AS118C Upper 6 HF Middle 4 HF Lower 2 HF Upper 8 MF Lower 4 MF All LF 16 x AS118C Upper 10 HF Middle 4 HF Lower 2 HF Upper 12 MF Lower 4 MF All LF AS118M amplifier rack patch AS118M presets 20-39 configure Martin Audio DX1 or XTA DP226 outputs for the following active (as shown) & passive (using low- mid o/p) contr-to-amp patches: DX1 or DP226 Output 6 5 4 3 2 1 2x AS118M (Stereo) Right High Right Low- mid Optional Right Subs Left High Left Low- mid Optional Left Subs 4x AS118M (Stereo) Right High Right Low- mid Optional Right Subs Left High Left Low- mid Optional Left Subs 6x AS118M (Mono) 8x AS118M (Mono) 12 x AS118M (Mono) Upper 4 High Middle 4 High Lower 4 High Upper 8 Low- mid Lower 4 Low- mid Optional Subs Upper 2 High Lower 4 High Upper 2 Low- mid Lower 4 Low- mid Optional Subs Upper 4 High Lower 4 High Upper 4 Low- mid Lower 4 Low- mid Optional Subs All material © 2007. Subject to change without notice. Alternative AS118M +WLX presets (40-49) are now available. These provide active AS118M settings with a separate sub woofer signal chain via input B and output 6: DX1 or DP226 Input B DX1 or DP226 Output 6 Subs (Default = WLX) 5 Upper High 4 Middle High 3 Lower High 2 Upper Low-mid 1 Lower Low-mid 6xAS118M+WLX 8xAS118M+WLX 12xAS118M+WLX (Mono) (Mono) (Mono) WLX WLX WLX A A A A A Upper 4 High Upper 2 High Lower 4 High Upper 2 Low- mid Lower 4 Low- mid Upper 4 High Lower 4 High Upper 4 Low- mid Lower 4 Low- mid Middle 4 High Lower 4 High Upper 8 Low- mid Lower 4 Low- mid Band Zoning AS118M band zoning is from the bottom upwards as follows: Low-mid frequencies Bottom 4 cabinets in the lower zone The rest of the cabinets in the upper zone High frequencies Bottom 4 cabinets in the lower zone Up to 4 cabinets in the middle zone The rest of the cabinets in the upper zone Controller presets Your Martin Audio DX1 or XTA DP226 controllers must be loaded with the correct system preset files before use. See next section . . . Output limiters Please note that all AS118 Series controller output limiters are set for a power amplifier gain of 32dB (x40). DO NOT USE AMPLIFIER CLIP ELIMINATORS OR LIMITERS!Important: If you wish to use power amplifiers with different output/input gains please make sure you compensate by adjusting the limiter setting. Decrease limiter settings by 1dB for every 1dB increase in amplifier gain. All material © 2007. Subject to change without notice. Loading AS118 Series presets into your Martin Audio DX1 or XTA DP226 Presets are regularly updated. The Martin Audio heritage of AS118 series loudspeakers gives them that typical Wavefront arrayability. Simply ensure that the adjacent bottom rear corners are within 30cm. All material © 2007. Subject to change without notice. Smaller horizontal splay angles will tend to provide horizontal mid-band summation in the far field. For instance, 45° between adjacent arrays will boost the inter-array area by approximately 3dB. This can help the vocal projection to the far corners of arenas. Matching array curvature When specifying a system for very wide venues, try to keep inner and outer columns lengths and shapes similar for a given vertical coverage. If you don't have enough large cabinets to cater for everything, you can normally mix and match different AS118 series systems as follows: For instance, 16 x AS118C outers will match 12 x AS118 Longbows for the same vertical coverage in a large venue or 15 x AS118M outers will match 10 x AS118C inners for the same vertical coverage in a smaller venue. This will provide smooth inner-to-outer transition. Similar length and shape arrays ­ but different AS118 series ­ for the same coverage Short stretch systems A short stretch system is often all that is required to increase the main system's horizontal coverage beyond the normal pattern control of a main AS118 series line array to cover extra upper side seats. It is common practice to use a short array that matches the upper section of the main inner array. This is then flown fly at the height to the main array to cover, for instance, upper arena side seats. All material © 2007. Subject to change without notice. Main system (upper) with matching short side stretch array (lower) 5. 7 5. 7. 1 Subwoofers and front fills Subwoofer crossover and alignment Crossover frequencies Recommended AS118 series high pass (low cut) filters are as follows: Loudspeaker Type AS118 Longbow AS118C, AS118D or AS118CD AS118M or AS118MD Factory preset default 35Hz 24dB/8ve L-R 60Hz 24dB/8ve L-R 70Hz 24dB/8ve L-R Full-range (without subs) 25Hz 24dB/8ve L-R 30Hz 24dB/8ve L-R 30Hz 24dB/8ve L-R Different combinations of AS118 series line arrays (including down- fills) and commonly used subwoofers require accurate alignment. Optimum initial delay offsets will depend on the type of subwoofer to be used. [. . . ] Line array columns are usually band zoned (ie progressive shelving control is applied to the upper mid & high frequency sections of line array columns to partially compensate for air absorption). This band zoning relies on the exceptional mid and high frequency performance provided by adequately powered high-efficient mid and high frequency sections. Please note that our standard controller limiters are set with finite attack times. This allows all them to pass transient signals to the full output capability of the MA2. 8S without compression but to pull back to a suitable continuous power for sustained signals such as rail-to-rail feedback. [. . . ]