The RCF HDL 28-A is a compact bi-amped 2-way active touring system for a wide range of applications, both indoors and outdoors, with an emphasis on vocal intelligibility. It features two 8-inch woofers and an impressive 3-inch titanium compression driver. The time coherent waveguide is the result of in-depth research and design. Following the HDL 30-A philosophy, the HDL 28-A shares the composite material cabinet, the zero-degree phase and ultra-linear amplitude response. The built-in 2200 watt class-D amplifier delivers excellent playback clarity and up to 135 decibels SPL max. The RCF HDL28-A features state of the art RCF transducers with lightweight neodymium magnets. Considering its acoustical power, it has a remarkably low weight for easy handling and flying. The HDL 36-AS is the ideal flyable bass complement for the HDL 28-A array system.

Features

• 2200W Two Way Amplifier
• 135 dB Max SPL
• 48 kHz, 32 bit DSP processing
• RDNet Networked Management
• 2 x 8" Neodymium Woofers, 2.5" voice coil
• 1.4" Titanium Compression Driver, 3.0" voice coil
• Exclusive FiRPHASE technology on-board
• 750 Hz Crossover Point

NETWORKED CONTROL AND MUCH MORE

RDNet is an advanced platform for integrated monitoring and control of sound systems - from small live and installed setups to massive arena systems. Based on a robust networked architecture, RDNet combines system control, line array design, and comprehensive audio measurements into a single powerful software package. Engineers and technicians can intuitively manage every device on the network, from individual components to multiple groups. The platform provides full DSP control of compatible devices, with flexible configuration tools for perfectly tuning the system response at maximum speed. Users have real-time access and oversight of all key settings from a centralized interface.

The acoustic beauty of the symmetry

The symmetrical design of the cabinet produces identical left and right coverage. The component positioning and special DSP crossover filtering of the HDL 28-A take care of the constant directivity without spots of break up or attenuation. The specially-designed front baffle provides coplanar woofers, controlled LF dispersion and a central space to host the 4PATH waveguide. The heavy-duty front grille is powder coated. A special transparent-to-sound foam backing inside helps to further protect the transducers from dust. For weatherproof capabilities, a rain cover is available.

Powerful class D amplifiers

RCF's Class-D power amplifier technology packs huge performance operating with high efficiency into a lightweight solution. HDL amplifiers deliver a ultra-fast attack, realistic transient response, and impressive audio performance. The amplifier features a solid machined aluminium structure which not only stabilises the amplifier during transportation but also helps the fan-less heat dissipation. All the HDL amplifiers present SMPS power supply section to produce maximum output and minimum weight.

PRECISION SYSTEM DESIGN AND SIMULATION

RDShape is a 3D sound system design and acoustic-simulation platform for RCF and TT+ Audio speakers and subs. It enables touring pros, venue designers, and engineers to virtually lay out rigs, predict coverage and sound pressure level (SPL), verify rigging safety, and export system documentation.

Accurate 3D Acoustic Simulation Comprehensive Sound System Design AutoSplay and Sub Array Configuration Mechanical Validation and Safety

3D Venue Modeling STEP files for Collaboration Fine Tune with EQs & Filters Available on Windows and macOS

First class transducers

The RCF HDL 28-A features state-of-the-art RCF transducers with neodymium magnets. RCF's experienced engineering teams have specially developed and matched each component - starting from the power supply through the input board to the amplifiers and transducers right up to the complete HDL 28-A System.

High frequencies

High-performance RCF ND840 3.0-inch diaphragm titanium compression driver 1.4-inch exit throat 750 Hz Crossover Point

Low frequencies

2 X 2.5"voice coil neodymium 8" woofers Linear low frequencies handling down to 65 Hz Water resistant fibre doped cone Polycotton M-roll surround Hypervented magnetic structure

Flying attitude

The advanced rigging concept derives directly from its big brothers: the RCF HDL 30-A and HDL 50-A. The integrated mechanics are both fast and reconfigurable, allowing the system engineer to create J-shaped and spiral arrays. The hardware is designed for easy and fast setup. The angle can be adjusted on the ground before the system is hung and slipped automatically into the correct position as the array is pulled up. Up to 20 HDL 28-A modules can be fastened on a single flybar.

New perspective on linearity

RCF speakers are designed using a proprietary and advanced digital FiR technology, conceived to deliver transparent sound, absolute clarity, and perfect imaging to the listener. The special FiRPHASE filters allow for coherent distribution of sound for all listeners without phase distortions, ensuring minimum latencies in the system.

The ideal flyable bass complement

Theatrical and indoor requirements often need space in front of the stage, leaving no space for subwoofers. The HDL 36-AS is the ideal flyable bass complement for the HDL 28-A array system. It features one 4.0" voice coil, 15" Neodymium woofer to handle 135 dB SPL Max from 40 Hz to 140 Hz with maximum linearity and low distortion. The built-in 3200 Watt Class-D amplifier delivers excellent playback clarity and up to 135 decibels SPL max. With RDNet compatibility, the HDL 36-AS is part of the professional HDL System.

Specifications