RCF 4PRO SUB 8004-AS Active High Power Subwoofer

The SUB 8004-AS is one of the most powerful 18" subwoofers in pro-sound category.

Featuring a high power, hypervented 18" woofer, with 4" inside/outside voice coils, this cabinet is designed to deliver a serious amount of low frequency. Powered by a 1250W digital amplifier module, the SUB 8004-AS can perform in the most demanding situations. The input board includes volume control, deep/punch switch, high pass switch, phase switch, cardioid, time delay.


RCF 4PRO SUB 8004-AS Active High Power Subwoofer

  • 2500 Watt Peak, 1250 Wat RMS
  • 136 dB max SPL
  • 30 Hz - 120 Hz frequency response
  • 18" Woofer, 4.0" voice coil vented woofer
  • DSP controlled Input section with selectable presets
  • Delay control
  • Baltic birch tour grade cabinet
  • Compatible with NXL23-A (stacking)
  • Compatible with NXL24-A (stacking)
  • Multiple configurations with HDL 10-A and HDL 20-A


  • Live sound
  • Rental
  • Portable PA, clubs, ballrooms, live theatre
  • House of worship
  • Theme parks
  • Music playback and sound reinforcement in small and mid-size venues
  • Corporate A/V professionals and sound system hire companies


Stacking HD 32-A

The SUB 8004-AS is the perfect match with the HD32-A system. By utilising its M20 rugged insert on top of the cabinet it can be easily pole mounted. This combination forms an incredibly powerful PA system.

Pole Mounting

The SUB 8004-AS is equipped with a M20 rugged insert on top of the cabinet to easily pole mount one NXL 24-A or any two-way RCF speaker.

Stacking HDL 20-A

Up to 4 HDL 20-A can be stacked on top of 2 SUB 8004-AS using the HDL 20-A fly-bar

Stacking HDL 10-A

Up to 4 HDL 10-A can be stacked on top of 2 SUB 8004-AS using the HDL 10-A fly-bar.

Stacking NXL 23-A

A dedicated accessory, the "Stacking bar NXL 23-A", is available to stack up to 4 NXL 23-A on top of 2 SUB 8004-AS

Stacking 2 x NXL 24-A

Two NXL 24-A in HF close-coupling configuration can be mounted on top of a SUB 8004 using the accessory "stacking kit 2X NXL 24-A"


RT 8004-A Front
RT 8004-A Back

Acoustical Specifications
Frequency Response-3 dB: 30 Hz ÷ 120 Hz
Max SPL: 136 dB
Woofer: 18", 4.0" v.c.
Input/Output Section
Input signal: bal/unbal
Input connectors: XLR
Output connectors: XLR
Input sensitivity: -2 dBu / +4 dBu
Processor Section
Crossover frequencies: Selectable 80 Hz - 100 Hz Hz
Protections: Thermal, RMS
Limiter: Fast limiter
Controls: Xover, Phase switch, Deep/Punch, Output Delay Settings, Cardioid
Amplifier Specifications
Total power: 2500 W PEAK
Low frequencies: 2500 W PEAK
Total power: 1250 W RMS
Low frequencies: 1250 W RMS
Cooling: Convection
Connections: Powercon in-out 
Cabinet Material: Baltic Birch
Hardware: 2xM20, 4 x wheels mounting points
Handles: 4 side
Colour: Black 
Physical Specifications
Height: 700 / 22.56 mm/inch
Width: 557.5 / 21.95 mm/inch
Depth: 700 / 27.56 mm/inch
Net Weight: 51.0 / 112.20 kg/lbs 

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