User manual MARTIN AUDIO DX1

[. . . ] CONTENTS < > PRINT APPLICATIONS GUIDE GUIDES CONTENTS (ENGLISH) 1 IMPORTANT SAFETY INFORMATION 2 UNPACKING THE DX1 3 WARRANTY 4 INTRODUCTION 5 FRONT PANEL FUNCTIONS 6 REAR PANEL FUNCTIONS 7 OPERATING THE DX1 8 USING FACTORY PRESETS 9 CONFIGURING THE DX1 MANUALLY 10 CROSSOVER MODES 10. 1 Filter slopes 10. 2 Time alignment 11 BLOCK DIAGRAMS 12 OUTPUT LIMITERS 13 FUNCTION SCREENS 13. 1 Parametric equaliser screen 13. 2 High and lowpass filter screens 13. 3 Limiter screen 13. 4 Delay screen 13. 5 Polarity screen 13. 6 Gain screen 14 CROSSOVER SUB-MENU 15 INPUT SETUP SUB-MENU 16 SECURITY SUB-MENU 17 SYSTEM SUB-MENU 18 INTERFACE SUB-MENU 19 INTERFACE OPERATION 20 EQUALISATION CURVES 21 TECHNICAL SPECIFICATIONS 22 OPERATING NOTES 23 APPENDICES Page No 2 3 3 4 5 6 7 7 9 9 9 10 11 13 14 14 15 15 16 16 16 17 17 18 19 19 19 20 22 23 24 MARTIN AUDIO LONDON The Martin Experience Martin Audio ­ DX1 Speaker Management System CONTENTS < > PRINT APPLICATIONS GUIDE GUIDES ENGLISH 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 EN55103-1:1996 EN55103-2:1996 EN60065:1993 Electrical Safety 1 IMPORTANT SAFETY INFORMATION Do not remove Covers. No user serviceable parts inside, refer servicing to qualified service personnel. This equipment must be earthed. It should not be necessary to remove any protective earth or signal cable shield connections. Do not defeat the purpose of the polarized or grounding-type plug. [. . . ] Centigrade = (Fahrenheit ­32) x 0. 5555). 10 Martin Audio ­ DX1 Speaker Management System CONTENTS < 11 > PRINT APPLICATIONS GUIDE GUIDES ENGLISH BLOCK DIAGRAMS DX1 2 X 2 WAY + SUM A+B CROSSOVER DX1 2 X 3 WAY CROSSOVER 11 Martin Audio ­ DX1 Speaker Management System CONTENTS < > PRINT APPLICATIONS GUIDE GUIDES ENGLISH DX1 4 WAY CROSSOVER + 2 AUX DX1 5 WAY CROSSOVER + 1 AUX DX1 6 WAY CROSSOVER 12 Martin Audio ­ DX1 Speaker Management System CONTENTS < 12 > PRINT APPLICATIONS GUIDE GUIDES ENGLISH OUTPUT LIMITERS High performance digital limiters are provided for each output with control over attack time, release time and threshold level parameters (see page 15). This level of control allows the user to balance the required subjective quality of the limiter against the driver protection requirements. It does also mean that an incorrectly set limiter may sound awful!In particular, as with all limiters, using too fast an attack or release time will result in excessive low frequency distortion. In the `design a crossover' sub-menu there is an option for automatic limiter time constants. In this mode the time constants will be automatically set from the Highpass filter frequency. See table below. Table of automatic attack and release times. The time constants are set by the high pass filter frequency for that channel. It is highly recommended that the automatic setting is used to ensure highest sound quality and simplicity of configuration. High pass filter <10Hz ­ 31Hz 31Hz ­ 63Hz 63Hz ­ 125Hz 125Hz ­ 250Hz 250Hz ­ 500Hz 500Hz - 1kHz 1kHz ­ 2kHz 2kHz ­ 22kHz Auto attack time 45ms 16ms 8ms 4ms 2ms 1ms 0. 5ms 0. 3ms Release x16 (720ms) x16 (256ms) x16 (128ms) x16 (64ms) x16 (32ms) x16 (16ms) x16 (8ms) x16 (4ms) 13 Martin Audio ­ DX1 Speaker Management System CONTENTS < 13 13. 1 > PRINT APPLICATIONS GUIDE GUIDES ENGLISH FUNCTION SCREENS Parametric equaliser screen OP1+4 Low PEQ:1 1K00Hz Q=3. 0 0. 0dB All modes feature 5 bands of fully flexible parametric equalisation per output, with all sections selectable to Low or High frequency shelving response. Each parametric section can be positioned at a frequency from 20Hz to 20kHz and features a wide range of 'Qs' to produce response curves ranging from broad to notch. The gain control ranges from +15dB to -30dB in 0. 1dB steps. Frequency steps are 1/36 octave resolution for precise control. Since all filtering is achieved in DSP all settings are re-settable with absolute accuracy and in ganged mode parameters track identically. Very narrow band notch filters (maximum Q of 128) can be achieved and unlike analogue filters these 'tight' Q filters are entirely stable. Parametric filters are carefully implemented using Double Precision processing. This method is costly in terms of processing power but yields substantial benefits in terms of the DX1's exceptional noise performance and greatly improved low frequency stability. To adjust parametric settings: Use the FREQ control for the frequency. Use the BYPASS key to switch the parametric filter in and out of circuit. Note: the diamond symbol in the top right hand corner of the display indicates that the filter is in circuit and the horizontal line symbol shows that it is out. To show parametric filters in bandwidth (BW) rather than Q, go into the system sub-menu, select 'filter Q or BW' and then select `BW'. ) 14 Martin Audio ­ DX1 Speaker Management System CONTENTS < 13. 2 > PRINT APPLICATIONS GUIDE GUIDES ENGLISH High and lowpass filter screens OP1+4 <10Hz Low HPF Bessel 24dB Each output has an independent high pass filter and an independent low pass filter. Both filters have a range of selectable slopes which are Bessel 12dB, 18dB and 24dB, Butterworth 12dB, 18dB and 24dB, and Linkwitz Riley 24dB. Highpass filters have a range of <10Hz (through) to 16kHz and Lowpass filters have a range of 22kHz (through) to 59Hz in 1/36 octave steps. [. . . ] Shipping Dimensions(1U)(W) 560mm x (H) 115mm x (D) 425mm (excluding connectors). (W) 22ins x (H) 4. 5ins x (D) 16. 7ins (excluding connectors). Due to continuing product improvement the above specifications are subject to change. 22 Martin Audio ­ DX1 Speaker Management System CONTENTS < 22 > PRINT APPLICATIONS GUIDE GUIDES ENGLISH OPERATING NOTES What happens on switch on?As mentioned previously the DX1 can be programmed to go through a `Wake up' sequence which ramps up the output level over a set time period. The default is a wake up time of 10 seconds. [. . . ]