User manual XTA E2

[. . . ] Please spend a little time reading through this manual, so that you obtain the best possible performance from the unit. All XTA products are carefully designed and engineered for cutting-edge performance and world-class reliability. If you would like further information about this or any other XTA product, please contact us. We look forward to hearing from you in the near future. Unpacking the E2 After unpacking the unit, please check it carefully for any damage. [. . . ] Gain control: Adjust the amout of cut or obbst of the selected band of frequencies. Note the asymmetric nature of the control ­ 25dB of cut is available, and 15dB of boost. Frequency Control: In conjunction with the range key, select the centre frequency of the band. Range Key: Scale the frequency range available on the frequency control with this key. The left hand LED illuminated means multiply the values by 0. 1, so the control covers 10Hz to 200Hz. No LEDs illuminated means the range is "x 1" so the control covers 100Hz to 2kHz. The right hand LED means multiply the values by 10, covering the range 1kHz to 20kHz. Shelf Key: Bands 1 & 4 can have their response switched from a parametric (bell) filter to a shelving response. Band 1 will become a low shelf, boosting all frequencies below the selected frequency, and band 4 will become a high shelf, boosting all above the selected frequency. Note that the `Q' control will not have any effect when the shelf mode is on. `Q' control: In parametric mode, this will effect the width of the filter's response. Turned fully anti-clockwise the bandwidth is 0. 4, or 2. 5 octaves (a wide gently response). Fully clockwise, the `Q' is narrowed to 25, or 0. 04 octaves. E2 Operators Manual Page 7 Low Pass Filter Control: Adjust the cut-off frequency of the low pass filter from 250Hz to 22kHz(effectively off). Low Pass Filter Slope Key: Choose either a second order response (12dB per Octave roll-off) or a steeper 4th order response (24dB per Octave). Output Gain Control: To compensate for large amounts of cut or boost and bring the output level back to that at the input, use the output gain control, in conjunction with the meters. Output Meters: These meters permanently show the level after all processing, just before the digital to analogue converters. Page 8 E2 Operators Manual Rear Panel Connections Power Switch: turns the units mains supply off and on. Mains Fuse: located in a finger-proof holder adjacent to the mains inlet. Mains Inlet: connected via a standard IEC socket. Audio In-Out: 3 pin XLR sockets are provided for each channel. All are fully balanced, pin 2 hot, 3 cold, 1 screen. Always replace the fuse with the correct type and rating as shown on the rear panel legend. E2 Operators Manual Page 9 Operating the E2 Operation of the D2 is very straightforward, but there are a few points worth noting which, once understood, will make using the unit even easier. Switching the unit on and start-up procedure After plugging in the power and switching the power on suing the rear panel switch, confirmation is quickly given that all is well by all LEDs illuminating almost immediately after power-up. The LEDs of all `engaged' keys (when the unit was last powered up) will illuminated, and after the bypass relays disengage, a pattern will undulate across the LEDs as the level fades up. The entire process is complete when the input/output meters begin to operate normally. [. . . ] See the following diagram for details. XLR pin 1 Isolation points (arrowed) and 10dB pads (circled) E2 Operators Manual Page 11 Specifications Inputs: 2 electronically balancedu Impedance: > 10k ohms. Level: +20dBm into 600 ohm Frequency Resp. :+½dB 20Hz-20kHz Dyn Range:>110dB 20Hz-20k unwtd Distortion:< . 02%@1kHz, +18dBm High and Low Pass Filters: Slope: Switchable 12dB/Oct Butterworth or 24dB/Oct Butterworth. Parametric EQ Sections: Type: Selectable low/high shelf (bands 1 & 4 resp. ) or parametric response. Centre/corner Freq: 20Hz to 20k in three ranges `Q': 0. 4 to 25 (2. 5 ­ 0. 04 Octaves) Gain: +15dB to ­25dB Input/Output Gain Both +15 dB range. [. . . ]