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RCF SUB 8004-AS Active 18″ Subwoofer

2500W peak powered subwoofer with a high-performance 18” woofer and DSP-controlled presets. Delivers up to 136 dB SPL with cardioid and delay configuration options for touring and pro setups.

The RCF SUB 8004-AS is a tour-grade, high-output 18” powered subwoofer designed for demanding live and installed sound applications. Equipped with a 2500W peak Class-D amplifier and a vented 18” woofer with a 4” voice coil, this sub delivers ultra-deep bass response down to 30 Hz and a maximum SPL of 136 dB—ideal for venues, concerts, and rental applications requiring precision and power.

DSP-controlled presets, cardioid configuration options, output delay, and punch/deep EQ modes provide complete flexibility for different environments and configurations. Built with durable Baltic birch and designed for stacking or pole-mount setups, it pairs seamlessly with the NXL and HDL series from RCF.

Key Features:

  • 2500W Peak / 1250W RMS Class-D amplification
  • 18” woofer with 4.0” voice coil for powerful, accurate low-end
  • DSP-controlled input section with crossover, delay, and cardioid mode
  • Deep/Punch EQ switch, phase switch, and output delay settings
  • Convection-cooled and fanless for quiet operation
  • Stackable Baltic birch cabinet with M20 pole mount

Tech Specs:

TypeActive High-Power Subwoofer
Frequency Response30 Hz – 120 Hz
Max SPL136 dB
Woofer18″ with 4.0″ voice coil
InputsXLR (balanced/unbalanced)
OutputsXLR
Input Sensitivity-2 dBu / +4 dBu
Hi-Pass Filter120 Hz
Low-Pass Filter90 Hz
ProtectionsThermal, RMS
LimiterFast Limiter
ControlsXover, Phase, Deep/Punch, Output Delay, Cardioid
Total Power2500W Peak / 1250W RMS
CoolingConvection
Power ConnectionsPowercon IN/OUT
MountingM20 Threaded Pole Mount
Cabinet MaterialBaltic Birch Plywood
ColorBlack
Dimensions (H x W x D)27.56″ x 21.97″ x 27.56″
Weight123.46 lbs (56 kg)
    features
    Built-in Amplifier
    Clear Audio
    Event-Ready Durability
    Plug-and-Play
    Portable Design
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