User manual XTA GQ600

[. . . ] Filter design has been carefully optimised for good interpolation and improved narrow band performance, whilst high quality long-throw 45mm sliders are used for better resolution. The GQ600 also provides excellent noise and distortion performance, with a flat noise figure of better than -98dBm. Trim section is provided, with adjustable gain and frequency allowing fast adjustments to be made to overall high frequency response. This obviates the need for system re-voicing when, for example, changes in humidity or audience size occur. [. . . ] Hi-Pass Filter Frequency - sets the -3dB frequency anywhere between 10Hz and 150Hz. Graphic Controls - gain of up to ±10dB is provided at each centre frequency. High quality slider controls feature centre detent for accurate 'flat' position. Peak LED - illuminates as clipping point is approached anywhere within the equaliser circuitry. Fixing Holes - for security cover. GQ600 Page 5 Rear Panel Functions 1. Mains Power - is connected via a standard IEC socket. Mains Fuse - is located in a finger-proof fuseholder adjacent to the mains inlet. Always replace this fuse with the correct type as shown on the rear panel legend. Power Switch - a double pole rocker switch isolates both live and neutral connections. Please ensure this is set for the correct voltage before operating the unit. XLR Inputs and Outputs - separate 3 pin XLR connectors are provided for each audio input and output. All terminations are fully balanced where pin 2 = Hot, pin 3 = Cold and pin 1 = Screen (shield). Klippon Inputs and Outputs - a six pin Klippon socket is also provided for each channel. The corresponding plug features screw terminals allowing quick termination of system wiring, giving the advantages of barrier strip plus the bonus of easier servicing and the ability to pre-wire. Each connector carries input and output connections with all terminations fully balanced, where H = Hot, C = Cold, S = Screen (shield). 4. 5. 6. 7. GQ600 Page 6 Specifications Inputs Impedance CMRR Outputs Source Imp. ± 10dB via rotary control. Frequency Response± 0. 5dB 20Hz - 20kHz with controls "flat". Trim In/Out High-pass Filter Filter Type Frequency Low-pass Filter Filter Type LPF In/Out Equaliser Section Filters Filter Type Freq. Tolerance Range Connectors Inputs Outputs Input/Output Power Power Consumption Weight Size < -98dBm (20-20kHz unweighted) with controls '"flat". [. . . ] Solder in input transformers type LL1540 to positions TX2 and TX3 on main circuit board. Grounding. The Screen (shield ) pins on all audio connectors are normally connected directly to the ground pin of the IEC mains inlet. Signal ground (0V) is in turn connected to the chassis ground via a 10R resistor. GQ600 Page 8 To avoid ground loops, cable shields should be connected to ground at one end only. The normal convention is that the shield is only connected at the output XLR. [. . . ]