User manual MARTIN AUDIO CX2

[. . . ] Links to loudspeaker polar responses All material © 2007. Unpacking Thank you for purchasing a Martin Audio AQ Series system. Every Martin Audio loudspeaker is built to the highest standard and thoroughly inspected before it leaves the factory. After unpacking the system, examine it carefully for any signs of transit damage and inform your dealer if any such damage is found. [. . . ] Horizontal aiming Horizontal angles should be set so that the loudspeaker's main horizontal coverage is directed towards the main listening area. Avoid excessive reflections from nearby side walls. When arraying AQ8, AQ10 or AQ12 loudspeakers from ceiling brackets, allow approximately 100mm behind each loudspeaker for loudspeaker bracket clearance. 2 x AQ10 array viewed from above Recommended maximum and minimum AQ Series loudspeaker centre-to-centre splay angles are shown in the following table. Maximum splay angles will provide maximum coverage. Minimum splay angles provide an element of summation ­ typically 3dB between loudspeaker centres. Loudspeaker AQ5 AQ6 AQ8 AQ10 AQ12 AQ15 Horizontal splay angle (Loudspeaker centre-to-centre) Vertical splay angle (Loudspeaker centre-to-centre) Minimum *100° 45° 45° 45° 40° 40° Maximum 120° 90° 90° 90° 80° 80° Minimum 50° 45° 25° 25° 25° 25° Maximum 60° 90° 50° 50° 50° 50° All material © 2007. Subject to change without notice. (*Note that the AQ5 is a wide coverage, dual driver system. Each AQ5 has two full-range ICTTM devices horizontally arrayed at 50°. A 100° horizontal splay angle between AQ5 cabinet centres continues the array and provides very smooth coverage) Useful high frequency coverage for pairs of AQ Series loudspeakers Horizontally arrayed pair (minimum ­ maximum centre-to-centre splay) Total horizontal coverage 220 - 240° 135 - 180° 135 - 180° 135 - 180° 125 - 160° 125 - 160° 2 x AQ5 2 x AQ6 2 x AQ8 2 x AQ10 2 x AQ12 2 x AQ15 (100 - 120°) (45 - 90°) (45 - 90°) (45 - 90°) (45 - 80°) (45 - 80°) Vertically arrayed pair (minimum ­ maximum centre-to-centre splay) Total vertical coverage 110 - 120° 135 - 180° 75 - 100° 75 - 100° 75 - 100° 75 - 100° 2 x AQ5 2 x AQ6 2 x AQ8 2 x AQ10 2 x AQ12 2 x AQ15 (50 - 60°) (45 - 90°) (25 - 50°) (25 - 50°) (25 - 50°) (25 - 50°) 11. Choosing a power amplifier The high efficiency and impressive power handling of AQ series loudspeakers combine to produce a system capable of very high sound pressure levels and impact. To realise full AQ Series performance use a power amplifier capable of delivering Peak Power* without excessive clipping. The AQX controller contains internal jumpers to cater for all common AQ Series configurations. (AQX limiter settings are shown later in this section. Limiter settings will vary depending on the voltage gain of the power amplifier to be used ­ see table at the end of this section. The 32dB line is highlighted for Martin Audio power amplifiers) Remove the lid to locate the jumper positions on the upper pcb (printed circuit board) ­ J1, J2, J5 & J6 to configure the AQX for AQ5, AQ6, AQ8, AQ10, AQ12 and AQ15 loudspeakers and J3, J4, J7 and J8 to configure the AQX for AQ112, AQ210, AQ212 and AQ215 subwoofers. Configure the AQX System Controller as indicated in the table and illustrations below ­ or refer to the appropriate illustration over the next few pages. All material © 2007. Subject to change without notice. *"With Sub" mode There are two HPFs (High Pass Filters) in the signal path ­ one on the mother board and one on the top pcb. The HPF on the top pcb sets the lowest operating frequency for the AQ5, AQ6, AQ8, AQ10, AQ12 or AQ15 loudspeaker in " Full Range"mode. The motherboard HPF operates in " With Sub"mode to provide a main loudspeaker-to-subwoofer crossover function. The top pcb HPF should be disabled in " With Sub"mode as the lowest operating frequency for the main AQ5, AQ6, AQ8, AQ10, AQ12 or AQ15 loudspeaker is set by the main-to-sub crossover function. Mono Subwoofer Move the mother board jumper J17 to the B position for mono subwoofer operation. **HF boost Simply move the J2 and J6 jumpers to the C position if HF boost is required. Limiter configuration Motherboard jumpers J11, J12, J13 & J14 must be set for safe operation ­ see end of this manual section for details. [. . . ] AQ212, AQ215 subwoofer Although Martin Audio MA and E Series power amplifiers work well down to 2 ohms, other power amplifiers often suffer sonic degradation or, worse still, shut down into low impedances. Always check your intended power amplifier's specifications and conduct listening tests before committing to a very low impedance system design. All material © 2007. Subject to change without notice. Typical AQ6, AQ8, AQ10, AQ12 or AQ15 wiring schemes Simple stereo full range system (AQ10/MA2. 8s shown) Identical wiring schemes are used for AQ6 (E1300 or MA1400 amplifier), AQ6 16ohm AQ8 (MA1400 or MA1. 6s), AQ10 (MA2. 8s), AQ12 (MA2. 8s) or AQ15 (MA4. 2s). Typical foreground music system with subs (AQ10/MA2. 8s + AQ212/MA4. 2s shown) Identical wiring schemes are used to add any AQ Series subwoofers. All material © 2007. Subject to change without notice. Typical distributed system with subs (AQ10/MA2. 8s + AQ112/MA4. 2s shown) Subwoofers may be switched to mono operation by setting AQX jumper J17 ­ see section 12. All material © 2007. [. . . ]