Crown Audio VT-15 manual Input and Output Connections, Grounding and Shields

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the back panel for installations that use separate chassis grounding. If ground loop hum is detected, a careful check of the studio grounding scheme is needed. The VT-15 is less suscep- tible to grounding problems than many studio devices.

Connections

The INPUT connector is a XLR-3 female wired with pin 1 ground, pin 2 “+” or “high,” and pin 3 “-” or “low.” The same input is used for either mic input or line input. The input match- es 150 ohm microphones or 600-ohm line signals and is transformer balanced.

The OUTPUT connectors are XLR-3 male wired with pin 1 ground, pin 2 “+” or “high,” and pin 3 “-” or “low.” The VT-15 is optimized for feeding balanced bridging inputs. (Virtually all modern audio equipment has bridging inputs.) The output is transformer-balanced.

The “GND” terminal is for use when an external grounding scheme is utilized.

The Fuse is a 3AG slow-blow type, 2 amp for 100 or 120 VAC operation, and 1 amp for 220- 240 volts.

The AC input connector is used with the mating line cord (supplied). For 120 VAC operation, this cord is a Belden 17250 or equivalent.

The unit does not utilize any RFI filtering, and no RFI has been experienced, even when the VT-15 is operated in close proximity to AM, FM, and TV broadcast transmitters.

Input and Output Connections

See Figure 1. Gold-plated XLR connectors are used for inputs and outputs. The input connec- tors are female and the outputs male.

All connectors are wired according to AES standard: pin 1 is ground (shield), pin 2 is “high” or “+,” and pin 3 is “low” or “-.” A positive voltage on pin 2 of the input will result in a posi- tive voltage on pin 2 of the output (with the Phase Reverse switch set to Normal).

Grounding and Shields

A full discussion of proper studio wiring schemes is beyond the scope of this manual, but, in general, the Input mating XLR connector must have the cable shield connected to pin 1. With most microphones, this shield must also be connected to pin 1 at the microphone end of the cable.

Whether the shield is connected to pin 1 of the output connector depends on the standard in your studio. The shield should be connected to ground at only one end of the output cable; however, although not recommended, the shields can often be connected at both ends with- out a problem.

D.W. FEARN

VT-15 Recording Channel

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Contents Fearn How to Contact us Fearn Certificate of RoHS CompliancePage VT-15 Vacuum Tube Recording Channel Final Test Report B l e o f C o n t e n t s List of IllustrationsCopyright 2007 D.W. Fearn & Associates Limited 5-Year Warranty History of the VT-15 Vacuum Tube Recording Channel Fearn E C I F I C AT I O N S E C I F I C AT I O N S C O N T ’ D S C R I P T I O N Fearn Power S TA L L AT I O NInput and Output Connections Grounding and ShieldsVT-15 front panel controls and indicators E R AT I O NControl Set-up Mic Input OutputOntrols see Figure Compressor Controls Equalization Controls Benc h Test Initial Set-UpFearn E O RY O F O P E R AT I O N Preamp SectionCompression Section VU Meter and Meter Amplifier Fearn I N T E N a N C E VU Meter Calibration Warranty Repair TroubleshootingFactory Check-Out

VT-15 specifications

The Crown Audio VT-15 is a robust loudspeaker system that has gained recognition for its advanced technologies and impressive audio performance, making it ideal for various applications, including live events, installations, and broadcast scenarios. Built with durability and sound quality in mind, the VT-15 serves both professionals and enthusiasts in the audio industry.

One of the standout features of the VT-15 is its high-efficiency design, which is achieved through advanced driver technology. The loudspeaker is equipped with a premium 15-inch woofer that delivers powerful low-end reproduction, ensuring a solid bass presence that enhances the overall listening experience. This, combined with a high-frequency compression driver that operates at 1 inch, ensures clear and articulate treble frequencies, resulting in a balanced sound profile suitable for different musical genres.

The VT-15 incorporates Crown’s patented Waveguide technology, designed to provide consistent and controlled sound dispersion. This feature allows the loudspeaker to effectively cover large areas without experiencing significant drop-off in audio fidelity, making it a great choice for medium to large venues. The controlled directivity also means that listeners in various positions within the space can enjoy a similar audio experience, enhancing the performance of any event.

Another defining characteristic of the VT-15 is its rugged construction. Built with a reinforced enclosure, it is designed to withstand the rigors of touring and heavy use in fixed installations. The cabinet is constructed from high-quality materials that minimize vibration and resonance, further contributing to the clarity of sound. Its lightweight design allows for easier transport and setup, making it a practical choice for audio professionals on the go.

In terms of connectivity and compatibility, the VT-15 features versatile input options, allowing it to integrate seamlessly with various audio systems. Whether used in conjunction with other Crown products or compatible equipment from different brands, the VT-15 ensures flexibility in configuration.

Overall, the Crown Audio VT-15 stands out as a high-performance loudspeaker that combines advanced technologies, durability, and sound fidelity. Its powerful drivers and innovative design make it a reliable choice for any professional audio application, providing users with the quality and performance they demand. Whether for live music, presentations, or installations, the VT-15 delivers exceptional audio experiences that elevate any event or setting.
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