User manual NADY PRA-8

[. . . ] 5 APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the PRA-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Do not attempt to service the product beyond what is described in the user maintenance instructions. All other servicing should be referred to qualified service personnel. 3 INSTALLATION To ensure years of enjoyment from your NADY AUDIO PRA-8, please read and understand this manual thoroughly before using the unit. INSPECTION Your PRA-8 was carefully packed at the factory in packaging designed to protect the units in shipment. Before installing and using your unit, carefully examine the packaging and all contents for any signs of physical damage that may have occurred in transit. (Note: Nady Systems is not responsible for shipping damage. If the unit is damaged, do not return to us, but notify your dealer and the shipping company immediately to make a claim. Such claims must be made by the consignee in a timely manner. ) CONTENTS: · Instruction manual · PRA-8 (verify that the unit's serial number is same as shown on shipping carton) · AC Power cord · Warranty Card RACK MOUNTING The PRA-8 fits into one standard 19" rack unit of space (1 3/4"). Parts of the unit can become very warm during use. Care should be taken to ensure that there is enough space around the unit for cooling (at least 12" or 30cm). Do not place the PRA-8 on high temperature devices such as power amplifiers, etc. , or the unit may overheat in operation. Also, do not place the unit on speakers as this may cause them to move and/or fall due to speaker vibrations. Although the unit's chassis is shielded against radio frequency (RF) and electromagnetic interference (EMI), extremely high fields of RF and EMI should be avoided. POWER CONNECTION The PRA-8 has an internal power supply and is designed to operate from an external AC source. Power requirements for electrical equipment differ from area to area. Be sure to confirm that the voltage selected by the voltage selector switch on the back panel is proper for your area (120VAC/60 Hz or 230VAC/50Hz) per the information below: Europe (except UK): 230V, 50Hz UK and Australia: 240V, 50Hz USA and Canada: 120V, 60 Hz For other areas, please check with local authorities. When ready to operate, plug the AC cord into the power source. Make sure that the unit is turned off before connecting to the AC power source to avoid possible loud transients which can damage your speakers or your ears, especially when monitoring with headphones. 4 FRONT & REAR CONNECTIONS (1) (2) (4) FRONT PANEL (3) (9) REAR PANEL (6) (7) (8) (5) FRONT PANEL (1) AUDIO INPUTS Eight balanced XLR audio input jacks REAR PANEL (5) AUDIO OUTPUTS Eight balanced output 1/4" TRS jacks (6) POWER CONNECTOR WITH FUSE HOLDER This standard IEC power cord receptacle is used to connect the AC power to your unit. It features a built-in fuse holder for a 5X20mm, 0. 5A/250V slow-blow fuse. If the fuse continuously blows, shut off the unit and have it serviced by qualified service personnel. CONTROLS & INDICATORS FRONT PANEL The PRA-8 has eight independent pre-amplifier channels. The unit provides variable rotary gain controls, phantom power and peak indicator lights per channel. (2) GAIN CONTROLS Each channel features a rotary gain control for variable adjustment of the desired pre-amplifier level. (3) PHANTOM POWER SWITCHES If needed to power condenser microphones, each channel features a phantom power switch for supplying +48VDC across pins 2 and 3 of the XLR input connector. If you don't need phantom power, be sure to turn this switch to the "OFF" position. REAR PANEL (8) POWER SWITCH To turn the unit ON or OFF, press the upper or lower portion of this button as indicated. The front panel POWER LED INDICATOR (4) will illuminate when the power is "ON". Before turning on this unit, verify connection to the proper voltage AC source, check all connections and turn down the level controls of equipment connected to the outputs. (6) AC VOLTAGE SELECTOR SWITCH Before plugging in the power cord, check to see that the unit is set for the proper voltage for your area: ~115v (60Hz) or ~230V (50Hz). (Note, It is safe to connect balanced dynamic mics even if this switch is on, but connecting unbalanced devices or devices whose transformers are center grounded will cause hum or malfunctions. [. . . ] 74dB Phantom power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +48V, switchable AUDIO OUTPUTS Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/4" jack Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRS Balanced Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 Ohms Peak output level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]