User manual ART SLA2

[. . . ] 7 Clip LED Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Protect LED Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 ¼" Input Jacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] AC POWER HOOKUP The SLA-2 has an internal power supply designed to operate at 120 VAC @ 50 to 60 Hz. Units manufactured for use outside of North America have been modified to comply with the required electrical specifications. AUDIO CONNECTIONS Audio connections to and from the SLA-2 are balanced XLR [Pin 2 = Hot (+), Pin 3 = Cold (-), Pin 1 = (Ground)] and balanced or unbalanced ¼" [Tip = Hot (+), Ring = Cold (-), Sleeve = (Ground)]. See diagram on page 10 5 SECURITY COVER For commercial installations it may be desirable to set the gain controls on the power amp, and then make them inaccessible to non-qualified operators. This can be accomplished by using the Security Cover Plate which is included with the SLA-2. Simply set the channel attenuators to the desired gain settings, then press the knobs into the chassis until they lock in their recessed position. Then remove the two small phillips head screws, one on each side of the two channel attenuator knobs. Use these same screws to attach the security cover plate to the front panel, thereby covering the two channel attenuators, making them tamperproof. See diagram below 6 CONTROLS & INDICATORS ­ FRONT PANEL FRONT PANEL DIAGRAM POWER SWITCH The Power Switch is located on the front of the unit, directly in the center. During initial installation, make sure the attenuators for channels one and two are set to a low volume level before applying power. CHANNEL ATTENUATORS The dials for channel one and channel two's volume attenuators are located to the left and right of the Power Switch. When set to zero (fully clockwise), there is no attenuation of volume. As the attenuation amount increases by turning counterclockwise, the volume is reduced. The LED will glow when the amplifiers output signal is within approximately 30dB of full scale. This LED comes on when the output signal from the amplifier begins to distort. When there is significant clipping, lower the input gains to reduce clipping, as well as the risk of damage to the speakers/monitors. 7 PROTECT INDICATOR LED The LED will glow when the channel goes into protect mode. In protect mode, the output signal to the speakers will be muted (channel specific). If there is a fault condition at the speaker outputs (due to a severe load or short) the LED will light until the fault is removed. The protect lights will also light during power up and down, to indicate that the signal is muted. 8 REAR PANEL CONNECTIONS REAR PANEL DIAGRAM It is easy to interface the SLA-2 with a wide variety of equipment. Standard EuroBlock, ¼" and XLR inputs and binding post outputs make patching simple. INPUTS The SLA-2 has three styles of input connections: EuroBlock, XLR and ¼". Use these connections to connect the output signal from a mixer, preamplifier, crossover, or EQ to the amplifier. [. . . ] Please write down a description of your complete setup before calling Customer Service. 3) Contact our Customer Service Department at (716) 297-2920 for your Return Authorization number or questions regarding technical assistance or repairs. Customer Service hours are 9:00 AM to 5:00PM Eastern Time, Monday through Friday. 5) Include with your unit: a return shipping address (we cannot ship to a P. O. [. . . ]