What makes the VRACKHD4FX different from using three separate Crown amplifiers?

The VRACKHD4FX integrates three Crown 3500HD amplifiers into a single 4U chassis with unified I/O management, power distribution, and HiQnet control, eliminating the need for separate units, external switching gear, and additional rack space. This consolidation reduces system complexity while maintaining full professional amplification capability.

What protocols and connectivity does this unit support?

The system provides four discrete input and output pairs supporting analog, AES 3 digital, VDrive, and CobraNet protocols, allowing integration into networked systems, traditional analog installations, or a mix of both.

How transparent and clean is the audio output?

The VRACKHD4FX achieves a signal-to-noise ratio of 108dB or better and total harmonic distortion of 0.35%, with a damping factor exceeding 5000 for precise speaker control across the full frequency spectrum, ensuring pristine audio even at extended operating levels.

Can I adjust the input sensitivity, and how flexible is the gain structure?

Yes, adjustable sensitivity ranges from 1.28Vrms to 8Vrms in 0.1dB increments, accommodating virtually any source impedance and allowing precise gain structure matching to your installation or mixing console.

Is this unit suitable for both touring and permanent installations?

Yes, the VRACKHD4FX is purpose-built for touring sound engineers, installed systems, and rental houses; it operates on both U.S. 120VAC and European 220-240VAC standards and includes HiQnet Performance Manager software for remote monitoring and control in any professional environment.

Do I pay sales tax on this order?

We collect sales tax only on orders shipped to California. Orders shipped to any other US state are charged $0 sales tax at checkout when you buy direct from our website. On this item that is roughly $4,181 less out the door than the same listed price at a national retailer or on a marketplace. Marketplaces such as eBay, Reverb and Amazon collect sales tax in nearly every state as marketplace facilitators no matter who the seller is, so the same item at the same price costs less bought direct. Free US shipping and 30-day returns are included. Some states ask buyers to self-report use tax on out-of-state purchases.

Crown VRACKHD4FX Complete HD4 Vrack

The Crown VRACKHD4FX is a fully integrated rackmount amplification and power distribution system built for touring rigs, installed venues, and rental inventories that demand transparent, high-headroom audio reproduction across multiple channels. This compact yet powerful unit consolidates three Crown 3500HD amplifiers with integrated I/O management into a single 4U footprint, eliminating the need for separate amp units and external switching gear. Sound engineers and venue operators rely on the Vrack to deliver professional-grade amplification without the footprint or complexity of traditional multi-unit setups.

Audio Performance & Signal Integrity

The system achieves a signal-to-noise ratio of ≥108dB and total harmonic distortion of 0.35%, ensuring pristine audio reproduction even at extended operating levels. With a damping factor exceeding 5000, the amplifiers maintain tight control over speaker loads across the full frequency spectrum, critical for both foreground and background installations requiring accurate frequency response and predictable stage or venue behavior.

Connectivity & Control Architecture

Four discrete input and output pairs support analog, AES 3 digital, VDrive, and CobraNet protocols, allowing seamless integration into networked systems or traditional analog installations. The HiQnet Performance Manager™ software provides comprehensive control and real-time monitoring of all amplifier parameters from a control point or remotely, while adjustable sensitivity from 1.28Vrms to 8Vrms in 0.1dB increments accommodates virtually any source impedance or gain structure.

Key Features

Three integrated Crown 3500HD amplifiers in single 4U chassis
Signal-to-noise ratio ≥108dB for transparent audio delivery
Total harmonic distortion: 0.35%
Damping factor >5000 for precise speaker control
Four input and four output channels with analog, AES 3, VDrive, and CobraNet support
Adjustable sensitivity from 1.28Vrms to 8Vrms in 0.1dB increments
HiQnet Performance Manager™ software for remote monitoring and control
Power Factor Correction technology
Global power supply: 100-240VAC, 50/60 Hz (±15%)
Operates on both U.S. (120VAC) and European (220-240VAC) standards
Integrated power distribution eliminates external components
Professional rackmount form factor for fixed installations and touring applications

The VRACKHD4FX represents Crown's commitment to delivering integrated amplification solutions that reduce system complexity while maintaining the transparent, low-distortion performance demanded by professional audio installations worldwide.

Condition	New
Country of Manufacture	Mexico