User manual ART 442

[. . . ] Unbalanced operation requires using the RCA phono connector or use Pin 2 of the XLR or tip 1/4" TRS as ground. 2 Balanced output requires using Pin 2 of the XLR or the tip of the 1/4" TRS as output Hi (+) and using pin 3 of the XLR or the ring of the 1/4" TRS as Lo (-). Paralleling inputs and outputs may be accomplished by using any of the three connectors. SIGNAL LEVELS Signal levels from -10 dBu to +4 dBu are considered normal and 20dB of headroom exists above these levels. CHASSIS GROUNDING The Model 442 and 452 Equalizers are equipped with a rear panel Ground Lift switch. [. . . ] At 6dB the green LED will illuminate and at 12dB the yellow LED will illuminate. BYPASS SWITCH & INDICATOR When the red LED is illuminated, this indicates that the unit or channel is in the bypass mode. Signal is routed directly from the input to the output without passing through any circuit (often referred to as "hard-wire bypass"). Use this switch to compare equalized and unequalized material, or to bypass the EQ section in the event of power loss or unit failure. OVERLOAD INDICATOR This red LED illuminates if any section of the equalizer is within 5dB of clipping. Occasional flickering of this LED is acceptable, but if it remains on more than intermittently you should turn down either the equalizer's level controls or reduce the output level of the preceding component to avoid audible distortion. HI PASS FILTER (LOW-CUT FREQUENCY CONTROL) To cut down on unwanted low frequency signals, this control determines the roll-off frequency of the High-Pass Filter (HPF). The roll-off frequency can be adjusted from 10Hz to 250Hz by turning this knob. Because of its high roll-off slope, the HPF can be efficiently used to cut down the "HUM" noise from preceding instruments, or to reduce low frequency resonances, when speakers are installed in an enclosed acoustic environment. LOW PASS FILTER (HIGH-CUT FREQUENCY CONTROL) To cut down on unwanted high frequency signals, this control determines the roll-off frequency of the Low-Pass Filter (LPF). The roll-off frequency can be adjusted from 3kHz to 40kHz by turning the knob. Because of its high roll-off slope, the LPF can be effectively used to cut down the high frequency noise from preceding instruments, or roll-off excessive high frequency sounds to obtain a more natural sound in acoustic situations. 5 8. LEVEL CONTROL This controls the level of signal coming into the equalizer. Turn this control down if the Clip LED illuminates steadily (meaning too strong an input signal). Unity gain can be set by turning this knob to its center detent position. LED Metering Each channel of the equalizer has an LED array meter, showing its output level. Use the meter when adjusting the output level Control to aid in sending the proper level to your next piece of equipment. DUAL 15 BAND GRAPHIC EQUALIZER 14 13 12 11 10 31 BAND GRAPHIC EQUALIZER 14 13 12 11 10 REAR PANEL CONNECTORS & CONTROLS 10. POWER CORD This cord is used connect the AC power source to your equalizer. CAUTION: Equipment for USA installation includes a captive power cord with a three-pin polarized plug. This fuse should be replaced with the same type fuse if it is blown out. If they continuously blow, stop replacing fuse and refer servicing to qualified person6 nel. CAUTION: After checking the AC supply voltage, be sure that the correct fuse is in the fuse holder; 0. 6Amp for 100-103VAC, as well for 220-240VAC. [. . . ] This warranty is void if the serial number is altered, defaced, or removed. A R T reserves the right to make changes in design or make additions to or improvements upon this product without any obligation to install the same on products previously manufactured. A R T shall not be liable for any consequential damages, including without limitation damages resulting from loss of use. Some states do not allow limitations of incidental or consequential damages, so the above limitation or exclusion may not apply to you. [. . . ]