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. 1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 2.
Table of Contents Introduction Unpacking Installation & Mounting Front Panel Controls Back Panel Controls & Connections Operation Protection Features Service Information Operation Mode Drawings Connection Detail Drawings Technical Specifications VsL Series Power Amplifiers Models VsL460, VsL900, VsL1500 2 2 2 2 3 4 5 5 6 7 8 Page 1
Introduction Front Panel Controls Congratulations on your purchase of a Crest Audio power amplifier. Please read this manual carefully (and the accompanying “Important Precautions” pamphlet) as it contains information vital to the safe operation of your amplifier. 1. Rack Mounting Ears. Your VsL Series amplifier represents a major step forward in power amplifier technology and design. It is feature-packed and engineered for value. Each channel has a signal LED.
Rear Panel Controls and Connections 13. Balanced TRS (1/4") Connectors. 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. For connection of balanced TRS Input Plugs. A diagram showing TRS polarity is shown on drawing 4.
Operation Connecting Power / Circuit Size Requirements. Bridged Mono Mode. 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. Consult the specifications at the end of this manual for the “typical” current that each amplifier will demand.
Protection Features. Every model in the VsL Series incorporates protection features. Derived from Crest Audio’s extensive experience with the world’s largest sound rental companies, the group of circuits sets new standards in load and amplifier protection. ACL. (Automatic Clip Limiting). At the amplifier’s full power, or clipping point, ACL will be activated. This is is indicated by illumination of the ACL LED, located at the right end of the meter array.
1. Stereo Mode Bridge + -- + +Output + Output Ch.B -- + + Bridge A A B + B + Crest Audio Inc. 100 Eisenhower Dr. Paramus New Jersey, 07652 USA + Crest Audio Inc. 100 Eisenhower Dr. Paramus New Jersey, 07652 USA + Designed & manufactured in the USA by: + Ch.A CLASS 2 WIRING MAY BE USED Designed & manufactured in the USA by: B Either TRS or Input Barrier Strips (but not both) may be used for input connection to Channel A. + +Output + Output Ch.B Ch.
4. TRS Polarity Tip - Positive (+) Ring - Negative (-) + Sleeve - Ground ( ) B + B 6. Unbalanced Input Connections + A + 5.
Specifications VsL460 VsL900 VsL1500 8Ω Stereo Power † 150 Watts 250 Watts 400 Watts 4Ω Stereo Power † 225 Watts 450 Watts 750 Watts 2Ω Stereo Power † 325 Watts 550 Watts 1000 Watts 8Ω Bridged Power † 450 Watts 900 Watts 1500 Watts 4Ω Bridged Power † 650 Watts 1100 Watts 2000 Watts 52.3V 70.
VsL Series Power Amplifiers Models VsL460, VsL900, VsL1500 Page 9
Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL: 201.909.8700 FAX: 201.909.8744 http://www.crestaudio.com Printed in USA v. 1.
