RCF HDL 50-A 4K — Active Three-Way Line Array Module

RCF POWER — NOW IN 4K: HDL 50-A 4K Three-Way Line Array

When you need stadium-scale output with studio-grade control, the RCF HDL-50-A-4K delivers. A four-channel Class-D amplifier (8000 W peak / 4000 W RMS) drives 2 × 12" neodymium woofers, 4 × 6" neodymium mids, and 2 × 3" titanium-dome compression drivers through a proprietary 4PATH waveguide for consistent 90° × 10° coverage. The low-latency 48 kHz / 32-bit DSP, onboard RDNet networking, and a symmetrical, V-shaped cabinet geometry keep vocals locked and mixes uniform from barricade to bleachers—indoors or out.

The re-engineered 4K power section operates at very low impedance with a high damping factor and a reinforced power supply for fast transients. The module’s machined aluminum amp structure stabilizes the electronics in transit, while Baltic birch construction, integrated mechanics, and multiple handles support fast, repeatable rigging on demanding shows.

Real-World Applications & Sound Roles

• Festival mains and arena hangs requiring long-throw clarity and uniform 90° coverage.
• Touring pop/EDM where RDNet monitoring and fast day-to-day repeatability matter.
• Municipal and corporate outdoor events needing high intelligibility and controlled LF dispersion.

Where the RCF HDL 50-A 4K Excels

• Headroom for Big Rooms: 8000 W peak amplification, 143 dB max SPL for stadium-class mixes.
• Consistent 90° × 10° Coverage: 4PATH waveguide and V-shaped baffle maintain tonal balance across the audience plane.
• Eight Neo Transducers: Dual 12" LF, quad 6" mids, dual 3" HF titanium drivers for punch, presence, and detail.
• High-Resolution Processing: 48 kHz / 32-bit DSP with intelligent limiting and protections for clean dynamics.
• RDNet Control: Onboard networking for array tuning, monitoring, and grouping—fast to deploy, easy to repeat.
• Tour-Built: Baltic birch cabinet, steel grille, integrated mechanics; handles on sides and rear for safe lifts.
• Efficient Rigging: Integrated fly-ware supports tight splay increments for precise J and spiral arrays.

Control Modes for the RCF HDL 50-A 4K

• Onboard Panel: Volume, bypass, delay, presets, and advanced functions via rear-panel encoder.
• Array Optimization: Cluster Size and HF Projection/Correction adapt voicing to box count and throw.
• DSP Engine: 48 kHz / 32-bit processing, soft limiter, thermal/RMS protections, crossovers at 200 Hz and 800 Hz.
• RDNet (Onboard): Networked monitoring/control, access to module inclinometer data, and per-section performance visibility.
• I/O & Power: Audio XLR in/out (bal/unbal), RDNet Ethercon in/out, PowerCON in/out; convection cooling.
• Preamplifier: Double opto isolation helps avoid noise and ground loops.

4K Amplifier: Faster, Stronger, Cleaner

Re-engineered Class-D power (4000 W RMS) operates at low impedance with a high damping factor for quick, detailed transients. The power supply’s increased current delivery improves control on fast peaks for a mix that remains open and composed at show level.

Low-Latency DSP with Smart Protections

A next-gen, low-latency 32-bit DSP handles voicing, limiting, and protections. Adjust Cluster Size and HF projection per hang; manage everything locally or through RDNet with straightforward monitoring of each section.

Networked Control—RDNet Platform

RDNet unifies device control, array design, and measurements. Engineers manage individual modules or grouped hangs with fast, centralized access to key parameters, accelerating tuning and improving repeatability from venue to venue.

V-Shaped Symmetry & 4PATH Waveguide

The V-shaped front baffle aligns midranges and woofers for controlled LF dispersion and a central HF path. The custom 4PATH guide produces precise 90° × 10° coverage and a linear HF response from 800 Hz upward.

Neodymium Precision Transducers

HF: 2 × large-format compression drivers (3.0" coils) support an 800 Hz crossover for vocal intelligibility. MF: 4 × 6.0" mids (2.0" coils, water-resistant cones, polycotton M-roll surrounds). LF: 2 × 12" woofers (3.0" coils, water-resistant cones, hypervented motors).

Cabinet, Fly-Ware & Handling

An innovative housing uses rigid Baltic birch with polypropylene side panels and integrated handles to reduce weight and speed lifts. Integrated rigging creates precise arrays with small splay increments; up to 20 modules can be suspended on a single flybar. Angle settings can be made on the ground and auto-locate when lifting—then lock with a pin for safety.

FiRPHASE: New Perspective on Linearity

Proprietary FiRPHASE filtering delivers coherent, low-latency response and natural imaging so the mix translates evenly to every listener position.

How to Deploy the RCF HDL 50-A 4K in the Field

• Plan the Hang: Determine throw and trim; choose J or spiral geometry. Pre-set splay angles on the ground in fine increments.
• Rig & Lock: Lift; let mechanics seat into position, then insert lock pins. Observe safe box counts (up to 20 modules per flybar as specified).
• Network & Power: Daisy-chain audio on XLR; connect RDNet Ethercon for monitoring/control; run PowerCON in/out.
• Voice the Array: Set Cluster Size and HF correction; verify alignment with fills/subs; walk coverage and refine groups in RDNet.
• Safeguard the Show: Confirm protections are enabled; use the rear-panel encoder for quick tweaks; monitor inclinometer and section health in RDNet.

Scale the count, set the angles, lock the coverage—HDL 50-A 4K stays consistent from pit to upper bowl.

Why Choose the RCF HDL 50-A 4K from AVMaxx

AVMaxx brings field-tested guidance to high-stakes rigs—array design tips, RDNet workflows, and Chicago logistics that keep load-ins on time. We help you specify box counts, tune voicing, and standardize hardware so your team hits the same result night after night.

AVMaxx is your partner for RCF solutions—field-aware recommendations, dependable support, and builds that help Chicago DJs and event pros perform with confidence.