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Your Audience Can Look Forward to a Moving and Captivating Musical Experience!
The SUB 8004-AS is one of the most powerful 18-inch subwoofers in professional sound reinforcement. Its hyper-ventilated 18-inch high-performance woofer with an inside/outside wound 4.5-inch voice coil delivers a powerful bass foundation. Equipped with a 1250-watt digital amplifier module, the SUB 8004-AS is ready for the most demanding tasks. The input control panel includes volume control and switches for "Deep/Punch," high-pass filter, phase, cardioid preset, and delay.

Powerful Class D Amplifiers
RCF’s Class-D amplifier technology combines large power reserves with high efficiency and low weight. RCF amplifiers feature extremely fast response, realistic transient reproduction, and an impressive sound profile. The robust aluminum housing protects the amplifier during transport and supports fanless heat dissipation. All amplifiers use switching power supplies for minimal weight and maximum performance.
Innovative Transducer Technology
RCF specializes in developing cutting-edge transducers using high-tech materials such as neodymium, carbon fiber, pure titanium, Kevlar, Kapton, and Mylar hybrids. With 70 years of experience in design, manufacturing, and marketing, RCF plays a key role in implementing technological innovations, including carbon cone diaphragms, dual silicone spiders, pure titanium diaphragm forming, and new voice coil winding techniques like inside/outside winding and rectangular wire coils. Their latest innovations led to advanced neodymium magnet circuits, entirely new ventilation systems for voice coils, and groundbreaking direct-drive voice coils.


Legendary Subwoofers
RCF subwoofers are the first choice for many sound engineers because they deliver very high sound pressure levels even at the lowest frequencies, are active and more compact than competing products, feature internal delay control and cardioid pattern options, and offer impressive output power relative to their size. Your audience can look forward to a moving and captivating musical experience.
Cabinet & Mounting Fixtures
RCF cabinets are made from birch plywood and coated with black textured paint. The subwoofers are stackable and lightweight, and thanks to ergonomically shaped handles, they are easy to set up and take down. High stands flanges on the top and one side allow the box to be used in various configurations. The powder-coated front grille is lined on the inside with acoustic foam, which additionally protects the speakers from dust.

Features
- 2500 Watt Peak Power (1250 Watt RMS)
- 136 dB Maximum Sound Pressure Level
- 30 Hz - 120 Hz Frequency Response
- 1x 18" Woofer
- DSP-Controlled Input Section with Selectable Presets
- Delay Control
- Tour-Ready Birch Plywood Cabinet
- Compatible with NXL 23-A (stackable)
- Compatible with NXL 24-A (stackable)
- Various Configurations Possible with HDL 10-A and HDL 20-A
Specifications
- Frequency Response: 30 Hz - 120 Hz
- Max SPL @ 1m: 136 dB
Transducer
- Woofer: 2x 18" with 4.0" Voice Coil
Input/Output Section
- Input Signal: Balanced/Unbalanced
- Input Connectors: XLR
- Output Connectors: XLR
- Input Sensitivity: -2 dBu/+4 dBu
Processor
- High-Pass Frequency: 120 Hz
- Low-Pass Frequency: 90 Hz
- Protection Circuits: 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
- Cooling: Convection
- Connections: Powercon IN/OUT
Physical Data
- Cabinet Material: Baltic Birch Plywood
- 4 Side Handles, 2 per Side
- Grille: Steel
- Color: Black
- Dimensions (HxWxD): 700 x 558 x 700 mm
- Weight: 56 kg
Scope of delivery
- 1 x RCF SUB 8004-AS Subwoofer
Specification
- Product number 00094074
- Power RMS (Watts) 1250
- Wheels included Nein
- Outputs XLR
- Stand mount flange M20
- Inputs XLR
- Subwoofers 1x 18 Zoll
- Colour Schwarz
- Weight in kg 56
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Financing
easyCredit Ratenkauf
- 2 to 60 months term
- Financing from 65,00 € / month
- More information about installment purchase
ConsorsFinanz Finanzierung
- 6 to 72 months term
- 0% financing for 241,50 € per month
- More information on financing
| 3 Year warranty | |
| 30 Day Money Back | |
| Price Match Guarantee | |
| Over 2.000.000 satisfied customers |
The hotline is currently not manned. You can reach us again on Wednesday, 20.05.2026 at 09:30.
| Tuesday | 09:30 - 18:00 | |
| Wednesday | 09:30 - 18:00 | |
| Thursday | 09:30 - 18:00 | |
| Friday | 09:30 - 18:00 | |
| Saturday | 09:30 - 13:30 | |
| Monday | Closed |
Different opening times |