User manual CREST AUDIO VSL 900

[. . . ] PROFESSIONAL POWER AMPLIFIERS OWNER'S MANUAL Important Precautions This symbol is used to alert the operator to follow important operating procedures and precautions detailed in documentation. This symbol is used to warn operators that uninsulated "dangerous voltages" are present within the equipment enclosure that may pose a risk of electric shock. 7. Always operate the unit with the AC ground wire connected to the electrical system ground. Precautions should be taken so that the means of grounding of a piece of equipment is not defeated. [. . . ] AC Power Switch/Circuit Breaker. VsL Series amplifiers have a combination AC switch/circuit breaker on the front panel. If the switch shuts off during normal use, push it back to the "ON" position once. If it will not stay on, the amplifier needs servicing. Fan Exhaust Ports. Heated air exits the amplifier through the fan exhaust ports, located on the sides of the amplifier chassis. Be sure not to block these ports, especially when rack-mounting the amplifier. Front Panel Diagram 1 2 3 4 5 6 7 8 5. 25" 133mm 2. 25" 57mm 19" / 483mm Page 2 VsL Series Power Amplifiers Models VsL460, VsL900, VsL1500 Rear Panel Controls and Connections 11. 5-Way Output Binding Post Connectors. For connection with bare wire, banana plug or spade lug output connections. Connection is made either to the Channel A and Channel B terminals (Stereo Mode), or across the red ("hot") terminals only of Channels A and B (Bridge Mode). See the "Operation" Section for more information. 13. Balanced TRS (1/4") Connectors. For connection of balanced TRS Input Plugs. A diagram showing TRS polarity is shown on drawing 4. Note: Unbalanced "Tip/Sleeve" plugs may be used with the balanced TRS connectors. The "ring" terminal or negative input will be connected to ground internally. 14. Balanced Barrier Strip Input Connectors. For connection of bare wire cable or spade lug connectors. Note: When connecting unbalanced inputs to the Barrier Strip inputs, make sure to jumper the negative terminal to the ground terminal. Otherwise, a 6 dB drop in signal level will result. See drawings 6 & 7 for diagrams detailing Input Barrier Strip connections. This push-button switch configures the amplifier for either Stereo or Bridged Mono operation mode. Amplifiers are factory-configured for Stereo Mode. See the "Operation" Section for more information. Rear Panel Diagram 17. 125" / 435mm + Output B Bridge + + Output A Designed & manufactured in the USA by: CLASS 2 WIRING MAY BE USED 5. 25" 133mm 220V/240V CAUTION ~50Hz Output Power @4/Ch RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS : RISQUE DE CHOC ÉLECTRIQUE--NE PAS OUVRIR WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. POUR ÉVITER LE RISQUE D'INCENDIE OU DE CHOC ÉLECTRIQUE, NE PLACEZ PAS CET APPAREIL SOUS LA PLUIE OU Á L'HUMIDITÉ VsL 460 VsL 900 VsL 1500 225W 450W 750W Crest Audio Inc. Paramus New Jersey, 07652 USA + B A + + A B + A+B 11 12 13 14 Side Dimensions VsL460, VsL900 VsL1500 2. 25" 57mm 2. 25" 57mm 12. 0" / 305mm 14. 56" / 370mm 9 VsL Series Power Amplifiers Models VsL460, VsL900, VsL1500 Page 3 Operation Connecting Power / Circuit Size Requirements. VsL Series amplifier power requirements are rated at "idle", 1/8th power ("typical" music conditions), 1/3rd power ("continuous" music conditions), and maximum rated power. The maximum power current draw rating is limited only by the front panel circuit breaker. [. . . ] In this diagram, bare wire has been connected to the Input Barrier Strip of Channel A, while a TRS plug is being connected to Channel B. 2. Bridged Mono Mode -- + + -- -- + Output Ch. B + + +Output Bridge Ch. A Output Ch. B + + +Output Bridge Ch. A CLASS 2 WIRING MAY BE USED CLASS 2 WIRING MAY BE USED Designed & manufactured in the USA by: Designed & manufactured in the USA by: Either TRS or Input Barrier Strips (but not both) may be used for input connection to Channel A. Crest Audio Inc. Paramus New Jersey, 07652 USA Crest Audio Inc. Paramus New Jersey, 07652 USA + B A + + B A + A B + + + A B + A+B A+B 3. [. . . ]