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Hersteller: Ashly Dateigröße: 1.84 mb Dateiname: Unterrichtssprache:

Using unbalanced connections could result in chassis ground-loop noise. Altering the signal/chassis ground relationship in equipment connected to your MQX unit may eliminate the noise. Inputs Inputs are 20K.. active balanced, or 10K.. unbalanced. The inputs of all Ashly crossovers are in phase with the outputs. Outputs The outputs are low impedance (200.. typical) pseudo-balanced using either connector. Pseudo-balanced lines have an equivalent line impedance on both (+) and (-) lines, allowing for long cable runs without compromising common mode rejection of unwanted noise. For maximum headroom, terminate outputs into loads of 600.. or greater. Each model has an additional output labeled MONO LOW OUT. This output represents the sum of low frequency outputs of both channels, for driving mono sub-woofers in a stereo system, reducing the number of power amps needed. All Rights Reserved Page - 6 Operator Manual – XR Series Crossovers Safety Instructions – 3 Physical Description Introduction – 4 XR Crossovers – 5 The XR-1001 is 1RU, and weighs 8 pounds. The XR-2001 & XR-4001 are 2RU, and weigh 11 pounds. Connectors & Cables–5 XR-1001 & XR-4001 Front Panels Physical Description – 6 Front Panels Rear Panels Installation – 7 Typical Applications - 8 Troubleshooting - 10 Dimensions - 10 Specifications - 11 Warranty - 12 1. Power -There is a dedicated power LED on the front; 5. Output Level -The output stage operates at unity gain with the power switch is on the back of the unit. the output level controls set at “U”. Max gain of the output 2. Input Level -boosts incoming signal up to +8dB stage is +15dB. In a typical setup, power amplifier input before it reaches the filters, or attenuates the signal to level controls should be run “full-on”, with level control being off. Maximum input level is +23dBu. The “U” shown at accomplished at the crossover. Note that horn and the 12:00 position indicates “unity gain.” compression driver combinations are much more efficient 3. Crossover Frequency -This infinitely variable control than cone speakers, often by 12 to 20dB. When used allows you to select an appropriate crossover point. together, you should expect a much lower level setting for Clockwise turning raises the crossover frequency the horns to obtain proper balance. Output mute switches while counterclockwise lowers it. Frequencies are allow you to isolate individual or grouped outputs for marked on standard ISO 1/3 octave center listening tests without affecting the settings of any other frequencies with each octave calibrated. Calibration outputs. accuracy is typically within 1/3 octave or better. If 6. Clip Indicator -Ashly crossovers feature a peak detection greater accuracy is necessary, measure the actual which monitors signal level at several critical points. The crossover frequency with an external device. LED will flash when signal levels of +20dBu are reached To allow a wider tuning range, the crossovers use a anywhere in the crossover. Since our crossovers have a recessed range switch for each frequency control. nominal 23dB of headroom referenced to a standard LED indicators provide range status at power-on. The operating level of 0dBu (.77 Volts), a flashing LED warns range switch divides the frequency indicated on the you that you are only 3dB from clipping. Since peak levels frequency control by 10 and gives a total range of are monitored at several points, the clip LED can be used to 200:1. Avoid damage to speakers by muting the isolate the source. If the LED flashes even though all input outputs before changing the range switch. and output levels are turned down, the signal feed is 4. Response -adjusts the damping of the filter affecting excessive. If the LED flashes when you turn the Input level the response shape at the crossover point. The dial control up (with the outputs still turned down), the overload calibrations refer to the amount of attenuation effected is occurring in the filter sections, and you should back the by the filter at the crossover frequency, i.e., a setting Input level down a bit. If the LED first flashes when you turn of 3dB means that the filter’s high-pass and low-pass the output level controls up, then the overload is occurring outputs are each “rolled off 3dB at the crossover in the output stage. In this case, if your power amplifier CAUTION: High frequency compression drivers may be destroyed by the use of too low point”. This describes Butterworth filter response, or a gentle 3dB peak at the crossover point where the two controls are at full gain, you are probably severely overdriving your amplifier. a crossover frequency. Make sure the range switch is filter output signals overlap. To obtain a flat signal, or properly set. You may want to “Linkwitz-Riley” response, set the Response control to install a security cover if the unit is accessible to untrained “6”. To obtain a notch at the crossover point, turn people. down the response control past “6” to best suit your need...

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