• 137 dB SPL Max
  • 30-400 Hz Frequency Range
  • 1 x 18" Hyper Vented woofer, 4" Voice Coil
  • DSP Controlled Input Section with selectable presets (e.g.cardioid)
  • 1400W RMS Class-D Amplifier
  • RDNet remote monitoring and control
  • Vertical and horizontal placement with M20 pole receptacle on top and side
  • Baltic Birch Cabinet

The RCF TTS 18-A II is a compact, high output subwoofer module ideal in combination with TT+ two way systems. The RCF TTS 18-A II woofer features lightweight neodymium magnet, inside-outside copper voice coil; silicon double spiders; water resistant treated cone; magnet assembly with minimum power compression. The amplifier section features 1400 watt RMS SMPS class-D Amplifier with full DSP and RDNet network capabilities.

Part number:

EAN 8024530015343

Responsive Image


Networked control and much more
RDNet is a robust management network and control platform for small, medium and large arena-sized sound systems, as well as complex and extended installations. Based on a proprietary network protocol, RDNet provides intuitive control and monitoring of every connected device/object in the RCF audio system. Each device has DSP to address specific presets or modifications of parameters to single or groups of objects. A network user can change level, delay, EQ (linear phase FiR as well) and other settings, including advanced subwoofer configurations. RDNet is not only designed for loudspeakers—you can control parameters and routing of multiple RCF devices, such as digital matrixes or amplifiers.


The RCF TT+ cabinets are made of high-quality birch plywood with weatherproof treatments. The subs are stackable and light-weight, for easy set-up and tear down. The polyurea coating and the rugged structure of the cabinet withstand long-term use and transportation and the separate housing for the amplifier guarantee the best components efficiency and reliability. A pole receptacle on the top and side allows the woofer to be used in various configurations. Transportation is fast thanks to the detachable Kart kit, a dolly caster-board with rugged tour grade casters and rotating cam mechanism.
Responsive Image
Responsive Image

High performance hypervented

RCF manufactures these components to deliver the cleanest, punchiest, and undistorted low frequencies reproduction. The cone is composed of 30% carbon fibre, 20% fibreglass and 50% cellulose pulp. This particular chemical composition has been carefully developed to improve the robustness and rigidness of the cone avoiding any deformation that would result in a loss of efficiency. RCF engineers have developed the unique Hyper Ventilation system with very low power compression. The cone is water resistant.
Responsive Image

Active advantage

An active sound system means having the power amplifier on-board of the cabinet. This brings some advantages:
  • Reduced setup time
  • Daisy chain signal and power connection of the entire system or by groups
  • No additional amplifier rack(s), saving space in the truck
  • The sound quality and performance are optimized to the individual components inside the speaker
  • The RDNet Networked Control can monitor each component of the system

Top and electronics

The amplifier integrates a low-noise 32 bit DSP circuit, controlled through the RCF proprietary RDNet network to easily handle the soft clipping limiters, RMS limits, polarity, amplitude, timing, and equalization. All the settings, monitoring, and advanced features are available inside the integrated RDNet Networked Management software. The control panel on the back adjusts volume, bypass, delay, presets and advanced functions.
Responsive Image

The good flow

It’s common knowledge in fluid dynamics that the turbulent airflow is reduced with a smart design of the port.

The improved vented port is a proprietary solution that helps to achieve a good aerodynamic behaviour of the air (laminar), gaining efficiency and reducing distortion.
Classic bass reflex port
The flow becomes turbulent and the vortices are evident
Responsive Image
Laminar flow vented port
Good aerodynamic behaviour of the air (laminar),
gaining efficiency and reducing distortions
Responsive Image

Subwoofer alignment tutorials

Acoustical specifications
Frequency Response:
30 Hz ÷ 400 Hz
Max SPL @ 1m:
137 dB
18'' neo, 4.0'' v.c
Input/Output section
Input signal:
Input connectors:
XLR, RDNet Ethercon
Output connectors:
XLR, RDNet Ethercon
Input sensitivity:
+4 dBu
Processor section
Hi-Pass Frequencies:
30 Hz, 40 Hz
Low-Pass Frequencies:
Variable from 50 Hz to 100 Hz
Thermal, RMS
Fast Limiter
Gain, Eq, Preset Switch, Output Delay
Power section
Total Power:
2800 W Peak, 1400 W RMS
Powercon IN/OUT
Physical specifications
Cabinet/Case Material:
Baltic birch plywood
2 x M20
2 x Side
708 mm / 27.87 inches
540 mm / 21.26 inches
732 mm / 28.82 inches
52 kg / 114.64 lbs
Shipping information
Package Height:
780 mm / 30.71 inches
Package Width:
800 mm / 31.5 inches
Package Depth:
610 mm / 24.02 inches
Package Weight:
56.8 kg / 125.22 lbs

1 related videos