CONTENTS < > PRINT GUIDES CONTENTS (ENGLISH) Page No 1 INTRODUCTION 2 2 UNPACKING 3 3 MAINS CONNECTION 3 4 CONNECTIONS 4 4.1 Input Connections 4 4.2 Output Connections 5 5 INITIAL SETTINGS 6 6 WX3A SYSTEM CONFIGURATIONS WITH PLUG-IN BOARDS 6 6.1 WX3A / W2 - Active W2 Configuration (Stereo) 7 6.2 WX3A / W3 - W3 Configuration (Stereo) 7 6.3 WX3A - Sub Bass and Full Range / High Pass Configuration (Stereo) 8 6.4 W1, W2, W3 Passive Operation Using WX3ASF Card (Stereo) 9 6.
> PRINT GUIDES This equipment conforms to the requirements of the EMC Directive 89/336/EEC, amended by 92/31/EEC and 93/68/EEC and the requirements of the Low Voltage Directive 73/23/EEC, amended by 93/68/EEC. Standards Applied EMC Emission Immunity Electrical Safety 1 EN55103-1:1996 EN55103-2:1996 EN60065:1998 INTRODUCTION Thank you for purchasing a Martin Audio WX3A System Controller. The WX3A is used to optimise the performance of Wavefront Series loudspeakers.
2 > PRINT GUIDES UNPACKING Each Martin Audio WX3A controller is built to the highest standard and thoroughly inspected before it leaves the factory. After unpacking the unit, examine it carefully for any signs of transit damage and inform your dealer if any such damage is found. It is suggested that you retain the original packaging so that the unit can be repacked at a future date if necessary.
> PRINT 4 CONNECTIONS 4.1 Input Connections GUIDES WX3A inputs are on female XLR type connectors and are electronically balanced. Pin 1 is normally open circuit but may be linked to sig 0V or chassis earth by inserting a link on the PCB (see Fig 1). The signal is always applied between Pin 2 (hot +) and Pin 3 (cold -). / \ /\ link for pin 1 chassis/earth link for pin 1 signal 0V No link for pin 1 open circuit Fig.
Chassis Grounded Shield Signal Grounded Shield > PRINT GUIDES Source WX3A Input 1 2 2 3 1 3 Source WX3A Input 1 2 2 3 1 3 Ground Lift Resistor Ground Lift Resistor Fig. 2 4.2 Output Connections The WX3A outputs are electronically balanced auto compensating via male XLR type connectors. Pin 1 is the (ground) connection and the signal appears between Pins 2 and 3. Always use 2-core + screen ‘balanced’ type signal leads, even for unbalanced circuits.
> PRINT GUIDES For balanced operation, the screen should be connected to ground at the amplifier end. To eliminate ground current loops, it can be lifted at the WX3A output, provided normal safety requirements have been met (i.e. the mains earths are correctly connected). See Fig 3. WX3A Output Signal Grounded Shield 1 Amplifier Input 2 2 1 3 3 Amplifier Input WX3A Output Chassis Grounded Shield 1 2 2 3 1 3 Fig.
> PRINT GUIDES Mounted on each plug-in board are jumper links. The links determine various low frequency equalisation (LF EQ) options. They are set by the user according to the application of the system. The various options concerning LF EQ are outlined in the following. These should be examined carefully, especially when using sub-bass in a system. 6.1 WX3A / W2 - Active W2 Configuration (Stereo) The WX3AW2LF board is used to control the W2 when operated as an active 2-way system (see Fig 4).
6.3 > PRINT GUIDES WX3A - Sub Bass and Full Range/High Pass Configuration (Stereo) The WX3ASF plug-in board is used to control the W1, passive W2 and passive W3 when operating either as stand-alone full-range systems or with additional WS2 sub-bass enclosures. It is also used to provide the outputs for other WX3A controllers configured to drive active W2 and W3 systems used in stereo with WS2 sub-bass enclosures.
> PRINT GUIDES Plug-in board jumper link positions are as follows: Mode (1), Full Range Mode (2), 100Hz high-pass Mode (3), Overlap 6.4 Jumper J4/J5 J3/J6 J4/J5 J3/J6 J4/J5 J3/J6 Position B A A B B A Jumper J1/J7 J2/J8 J1/J7 J2/J8 J1/J7 J2/J8 Position OUT OUT IN IN IN IN W1, W2, W3 Passive Operation Using WX3ASF Card (Stereo) A WX3A controller is used to provide LF equalisation and limiter functions for stand-alone W1, W2 and passive W3 systems operated full-range (see Fig 7).
> W3 PASSIVE W2 PASSIVE PRINT GUIDES W1 W3 PASSIVE W2 PASSIVE W1 WS2A SUB F.R. F.R. SUB or H.P. or H.P. WS2A RIGHT INPUT LEFT INPUT Fig 8. W1, W2 or W3 Passive operation with Sub Bass using WX3ASF Card 6.6 Mono Sub Bass J9 on the WX3ASF Card can be used to mono sum channels 1 and 3. 6.
> PRINT GUIDES The limiters on the high-pass outputs of the WX3A driving the W2’s or W3’s should also be defeated to prevent them operating in advance of following units. To defeat the limiters on Bands 2 & 4, move jumper links J2 and J4 on the main circuit board to the left position. Please refer to Section on limiters for further information. The WX3ASF is normally operated in 100Hz high-pass/crossover mode (2) (see Section 6.
6.8 > PRINT GUIDES WX3A W2 Mono With Sub Bass Configuration The W2 Active + Sub mono configuration is used to control a single channel active W2 system when used with a sub-bass (see Fig 11). Active crossover frequencies (100Hz, 1500Hz), relative output levels, driver alignment and equalisation are all pre-set for the W2 system plus sub-bass. W2 ACTIVE WS2A SUB LF NOT USED MF/HF WX3AW2 Mono RIGHT/MONO INPUT Fig 11. W2 Active + Sub configuration using WX3AW2 mono card 6.
> 7 PRINT GUIDES LEVELS Each output level may be adjusted from -ve infinity to +6dB relative to its nominal level. The system-specific plug-in boards include mid and high frequency band attenuation to provide level matching for approximate system balance when all controls are set to 0dB (assuming the use of amplifiers with identical gains). It should be noted, therefore, that front panel calibration would not necessarily indicate absolute band gains within the WX3A.
> PRINT GUIDES Threshold values corresponding to the switch settings are printed on the main circuit board for easy reference when making adjustments. They are: 0 1 0.2 0.4 2 3 0.5 0.7 4 5 0.9 1.1 6 1.3 7 8 9 A 1.4 1.6 1.8 2.0 B 2.2 C 2.3 D 2.5 E F 2.7 2.9 If operated by inexperienced personnel or in situations where abuse is likely, limiter switches can be backed off 2 or 3 positions to lower ‘safe’ thresholds.
10 > PRINT GUIDES TECHNICAL SPECIFICATIONS WX3A INPUTS 2 Electronically Balanced IMPEDANCE CMRR CONNECTORS 36K ohms (18K ohms per leg single ended) 67dB 20-10KHz 3 Pin female XLR OUTPUTS 4 Electronically Balanced SOURCE IMPEDANCE MIN LOAD IMPEDANCE MAX OUTPUT CONNECTORS 47 ohms 500 ohms +20dBu into 500 ohms limiter defeated 3 Pin Male XLR FREQUENCY RESPONSE -3dB @ 25 Hz 12dB / octave -3dB @ 35KHz 12 dB / octave (ultimately set by system parameters) DISTORTION+NOISE 0.
CONTENTS < > PRINT GUIDES WX3A System Controller Please Click here to return to main menu Please Click here to visit our website MARTIN AUDIO L O N D O N The Martin Experience Century Point, Halifax Road, Cressex Business Park, High Wycombe, Buckinghamshire HP12 3SL, England. Telephone: +44 (0)1494 535312 Facsimile: +44 (0)1494 438669 Web: www.martin-audio.com E-mail: info@martin-audio.com All material © 2007. Martin Audio Ltd. Subject to change without notice.
CONTENTS < > PRINT GUIDES WX3A System Controller User’s Guide ENGLISH MARTIN AUDIO L O N D O N The Martin Experience All material © 2007. Martin Audio Ltd. Subject to change without notice.
