RH-Foldback: Complete Product Overview and Specs

RH-Foldback: Complete Product Overview and Specs

Product summary

The RH-Foldback is a compact, rack-mountable audio foldback (monitor) processor designed for live sound reinforcement and studio monitoring. It combines multiple input routing options, adjustable EQ and dynamics, and flexible output configurations to deliver clear, low-latency stage monitoring for performers and engineers.

Key features

• Form factor: 1U rack-mount chassis with robust steel housing
• Inputs: 4 balanced XLR/TRS combo inputs, 2 stereo line inputs (RCA), and 1 AES/EBU digital input
• Outputs: 4 balanced XLR foldback outputs, 2 independent stereo aux outputs, and headphone output with independent level control
• Signal processing: Per-channel 4-band parametric EQ, high-pass filter, low-pass filter, and a selectable shelving option
• Dynamics: Per-channel compressor with adjustable threshold, ratio, attack, release, and makeup gain
• Latency: <2 ms total I/O latency (analog path)
• User interface: OLED display, rotary encoder, and soft keys for menu navigation; front-panel LED metering for all channels
• Connectivity: USB-C for firmware updates and scene management; MIDI In/Out for external control; optional Dante/AES67 card for networked audio
• Power: Universal AC input (100–240V), internal power supply, IEC connector; optional redundant power module
• Presets & scenes: 100 user memories, factory presets for common stage setups, snapshot recall via MIDI/USB

Technical specifications

• Frequency response: 20 Hz – 20 kHz ±0.5 dB
• Total harmonic distortion (THD+N): <0.01% at +4 dBu, 1 kHz
• Dynamic range: 110 dB (A-weighted)
• Maximum input level: +24 dBu (analog), 24-bit/96 kHz (digital)
• Maximum output level: +24 dBu (analog)
• Input impedance: 40 kΩ (line), 2 kΩ (mic) with optional mic preamp mode
• Output impedance: 200 Ω balanced
• Noise floor: -92 dBu (A-weighted)
• Sample rates (digital): 44.1 / 48 / 88.2 / 96 kHz
• Operating temperature: 0–40°C
• Dimensions: 482 × 44 × 200 mm (W × H × D)
• Weight: 3.2 kg

Controls & workflow

• Front-panel encoder navigates hierarchical menus shown on OLED.
• Soft keys provide quick access to channel mute/solo, scene recall, and EQ presets.
• Dedicated headphone section with source select and talkback switch.
• Rear DIP switches for hardware configuration (enable phantom power, set AES termination, etc.).
• PC/Mac editor via USB provides graphical control, drag-and-drop routing, and bulk scene management.

Use cases

• Live stage monitoring for bands and theater productions
• In-ear monitor (IEM) distribution when paired with compatible transmitters
• Small-to-medium house-of-worship installations
• Broadcast and OB vans requiring compact monitor processing
• Studio control room foldback for session musicians

Installation and routing tips

1. Place unit centrally in the rack to minimize cable lengths to stage boxes.
2. Use balanced XLR for long runs to reduce noise; reserve RCA for short local connections.
3. If using digital network audio (Dante/AES67), disable redundant analog tie-lines to avoid phasing.
4. Use the high-pass filter on vocal foldbacks to reduce stage rumble and improve clarity.
5. Save channel presets for common performers to speed scene changes.

Maintenance & firmware

• Regularly check and tighten rear connectors to prevent intermittent contacts.
• Keep firmware up to date via the USB-C updater; firmware notes include improvements to Dante stability and added compressor shapes.
• Replace internal battery (if present for RTC/memory) every 3–5 years.

Accessories and optional modules

• Dante/AES67 network card (optional)
• Redundant power supply module
• Rack ears and shock-mount kit
• Remote wall panel for front-of-house or stage control
• Stereo breakout cable for headphone distribution

Pros and cons

• Pros: Compact, low latency, rich per-channel processing, flexible I/O, strong build quality.
• Cons: Limited to four main foldback outputs (may require splitter for larger stages); optional network card adds cost; learning curve for advanced routing and scene automation.

Quick spec checklist

• 4 balanced foldback outputs
• Per-channel 4-band parametric EQ + dynamics
• <2 ms analog latency
• USB-C, MIDI, optional Dante/AES67
• 100 user scenes

If you want, I can produce a printable one-page spec sheet or a sample IEM routing diagram for a 6-musician stage.