RCF SUB 8004-AS

The SUB 8004-AS is among the most powerful 18” subwoofers in the professional audio market. Equipped with a high-power, hyper-vented 18” woofer featuring a 4” inside/outside voice coil, this subwoofer is engineered to deliver exceptionally deep and impactful low frequencies. Driven by a 1250W Class-D digital amplifier, the SUB 8004-AS performs reliably even in the most demanding live sound applications. The onboard control panel offers volume control along with deep/punch mode, high-pass filter, phase switch, cardioid configuration, and adjustable time delay.

Powerful Class-D Amplifiers

RCF’s Class-D amplifier technology delivers outstanding performance with maximum efficiency in a lightweight design. These amplifiers provide ultra-fast transient response, precise dynamics, and high audio fidelity. The solid machined aluminium chassis enhances durability during transport and enables efficient fan-less heat dissipation. An integrated SMPS power supply ensures high output power with minimal weight.

Transducer Innovation

RCF is a leader in advanced transducer development, utilising cutting-edge materials such as Neodymium, Carbon Fiber, Pure Titanium, Kevlar, Kapton, and Mylar composites. With over 70 years of engineering expertise, RCF has pioneered numerous technologies including carbon fiber cone moulding, double silicon spiders, inside/outside edge-wound voice coils, and pure titanium diaphragms. Recent innovations include state-of-the-art neodymium magnetic circuits, advanced voice coil ventilation systems, and groundbreaking direct-drive assemblies.

Legendary Subwoofer Performance

RCF subwoofers are trusted by sound engineers worldwide for their exceptional SPL output, extended low-frequency response, compact size, and self-powered design. Features such as internal delay, cardioid configurations, and an impressive size-to-output ratio ensure an immersive and powerful listening experience for any audience.

Cabinet & Mechanical Design

RCF cabinets are constructed from premium Baltic birch plywood with a durable textured black coating. Lightweight and stackable, they are designed for quick setup and teardown, featuring ergonomic handles for easy handling. A top and side pole mount allows for versatile system configurations. The powder-coated steel grille includes acoustically transparent protective foam to shield the transducer from dust and debris while maintaining optimal sound performance.

The SUB 8004-AS is among the most powerful 18” subwoofers in the professional audio market. Equipped with a high-power, hyper-vented 18” woofer featuring a 4” inside/outside voice coil, this subwoofer is engineered to deliver exceptionally deep and impactful low frequencies. Driven by a 1250W Class-D digital amplifier, the SUB 8004-AS performs reliably even in the most demanding live sound applications. The onboard control panel offers volume control along with deep/punch mode, high-pass filter, phase switch, cardioid configuration, and adjustable time delay.

Powerful Class-D Amplifiers

RCF’s Class-D amplifier technology delivers outstanding performance with maximum efficiency in a lightweight design. These amplifiers provide ultra-fast transient response, precise dynamics, and high audio fidelity. The solid machined aluminium chassis enhances durability during transport and enables efficient fan-less heat dissipation. An integrated SMPS power supply ensures high output power with minimal weight.

Transducer Innovation

RCF is a leader in advanced transducer development, utilising cutting-edge materials such as Neodymium, Carbon Fiber, Pure Titanium, Kevlar, Kapton, and Mylar composites. With over 70 years of engineering expertise, RCF has pioneered numerous technologies including carbon fiber cone moulding, double silicon spiders, inside/outside edge-wound voice coils, and pure titanium diaphragms. Recent innovations include state-of-the-art neodymium magnetic circuits, advanced voice coil ventilation systems, and groundbreaking direct-drive assemblies.

Legendary Subwoofer Performance

RCF subwoofers are trusted by sound engineers worldwide for their exceptional SPL output, extended low-frequency response, compact size, and self-powered design. Features such as internal delay, cardioid configurations, and an impressive size-to-output ratio ensure an immersive and powerful listening experience for any audience.

Cabinet & Mechanical Design

RCF cabinets are constructed from premium Baltic birch plywood with a durable textured black coating. Lightweight and stackable, they are designed for quick setup and teardown, featuring ergonomic handles for easy handling. A top and side pole mount allows for versatile system configurations. The powder-coated steel grille includes acoustically transparent protective foam to shield the transducer from dust and debris while maintaining optimal sound performance.

Acoustical Specifications

Frequency Response: 30 Hz – 120 Hz
Max SPL @ 1 m: 136 dB

Transducers

Woofer: 1 × 18", 4.0" voice coil

Input / Output

Input Signal: Balanced / Unbalanced
Input Connectors: XLR
Output Connectors: XLR
Input Sensitivity: -2 dBu / +4 dBu

Processor Section

High-Pass Frequency: 120 Hz
Low-Pass Frequency: 90 Hz
Protections: Thermal, RMS
Limiter: Fast limiter
Controls:

• 
  Crossover
  
• 
  Phase switch
  
• 
  Deep / Punch
  
• 
  Output delay settings
  
• 
  Cardioid
  

Power Section

Total Power: 2500 W Peak / 1250 W RMS
Low Frequencies: 2500 W Peak / 1250 W RMS
Cooling: Convection

Connections

Mains: PowerCON IN / OUT

Standards Compliance

Safety Agency: CE compliant

Physical Specifications

Cabinet Material: Baltic birch plywood
Hardware: Provision for four rear-mounted wheels
Handles: One handle on each side
Pole Mount: M20 thread
Grille: Steel with cloth backing
Color: Black

Dimensions & Weight

Height: 700 mm (27.56")
Width: 558 mm (21.97")
Depth: 700 mm (27.56")
Weight: 56 kg (123.46 lbs)

Shipping Information

Package Height: 761 mm (29.96")
Package Width: 751 mm (29.57")
Package Depth: 612 mm (24.09")
Package Weight: 60 kg (132.28 lbs)