LF
Woofer
18"
18NPW
Code: DR-18-019-8R-B2-C0001
Woofer/18inch/Neo/Paper/1200W/8ohm
Key Features
- Strong glass fiber loaded cone
- High temperature voice coil, double layer silicone spider
- High power handling
Quick Specs
Impedance
8 Ω
Program Power
2400 W
Sensitivity
99.14 dB
Fs
36.00 Hz
Magnet
Neodymium
Voice Coil
101.6 mm
Design Notes
The 18NPW is a high efficiency, (99 dB 1watt / 1 meter) 18-inch woofer with incredibly linear frequency response characteristics, extreme high power handling capability while generating low harmonic distortion artifacts. The 18NPW uses a lightweight, but strong, glass fiber loaded cone assembly along with a high excursion triple roll constant geometry surround. This combination provides remarkable strength, high efficiency and a peak to peak maximum excursion of 21.5mm.
Power Handling
At the core of the 18NPW is it’s voice coil technology featuring a composite Polyimide former material capable of withstanding peak temperatures in excess of 350°C, well beyond the thermal requirements of modern professional audio systems. The 18NPW delivers incredible performance.
REDCATT has implemented a double layer/silicone spider design to ensure long term Fs memory, consistency and diminish anomalies associated with spider deterioration. The sealed spider works as a air pump and pushes the air trough out motor to increase heat transfer and cooling of the parts.
Power Handling
At the core of the 18NPW is it’s voice coil technology featuring a composite Polyimide former material capable of withstanding peak temperatures in excess of 350°C, well beyond the thermal requirements of modern professional audio systems. The 18NPW delivers incredible performance.
REDCATT has implemented a double layer/silicone spider design to ensure long term Fs memory, consistency and diminish anomalies associated with spider deterioration. The sealed spider works as a air pump and pushes the air trough out motor to increase heat transfer and cooling of the parts.
Specifications
General Specs
Nominal Diameter
18"
Rated Impedance
8 Ohm
Magnet
Neodymium
Basket Material
Aluminum
Power Handling
AES Power
1200 W
Continuous Power
2400 W
Peak Power
4800 W
Voice Coil
Diameter
101.6 mm
Winding Wire
Copper
Former
Glass Fiber
Winding Height
23.7 mm
T/S Parameters
Resonant Frequency (Fs)
36.00 Hz
Re
5.10 \u2126
Qes
0.280
Qms
8.39
Qts
0.278
Vas
211.50 liters
Sd
1257.00 cm\u00B2
Mms
199.40 grams
Rms
5.40
Cms
0.1000
Bl
27.30 T\u00B7m
Le
1.510 mH
Sensitivity
99.14 dB
Design Details
Surround Material
fabric
Cone/Dome Material
Paper CF
Spider
Nomex
T-Plate
14 mm
Xmax (peak)
4.85 mm
Xmech
18.85 mm
Overall Diameter
468.00 mm
Bolt Circle Diameter
442.00 mm
Baffle Cutout Dia.
426.00 mm
Mounting Holes
8
Depth (flange to rear)
189.00 mm
Net Weight
9.40 kg
Ordering Codes
Product Code
DR-18-019-8R-B2-C0001
Downloads
Frequency Response & Impedance
2D Drawing
Technical Summary
The 18NPWX8-017 is a 18-inch high-output woofer driver designed for professional subwoofer systems where high efficiency (99 dB 1W/1m) and maximum acoustic output are required. The motor and suspension are optimized to maintain consistent performance at high drive levels, with controlled excursion and reduced thermal compression during long-term operation.
The driver is intended for use with high-power amplification (approx. 1200 W AES / 2400 W continuous) and DSP control. A high-pass filter in the range of 20-29 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 25-100 Hz, making it suitable for integration with mid-bass or full-range systems.
This design is particularly effective in single or multi-driver bass reflex systems used in touring, installation, and high-SPL applications, where consistent performance, durability, and output capability are critical.
The driver is intended for use with high-power amplification (approx. 1200 W AES / 2400 W continuous) and DSP control. A high-pass filter in the range of 20-29 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 25-100 Hz, making it suitable for integration with mid-bass or full-range systems.
This design is particularly effective in single or multi-driver bass reflex systems used in touring, installation, and high-SPL applications, where consistent performance, durability, and output capability are critical.
Recommended enclosure volumes are simulated results. For best enclosure volumes and tuning, we recommend secondary simulation and careful evaluation. Several rounds of samples and fine-tuning may be required for optimal results.
Enclosure Recommendations
Recommended enclosure alignments (bass reflex): - 210 liters tuned to 37 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 34 Hz, HP filter 29 Hz - 245 liters tuned to 32 Hz: balanced response, general-purpose (recommended); -3 dB approx. 27 Hz, HP filter 22 Hz - 275 liters tuned to 29 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 25 Hz, HP filter 20 Hz
Frequently Asked Questions
- - Strong glass fiber loaded cone
- - High temperature voice coil, double layer silicone spider
- - High power handling
Recommended enclosure alignments (bass reflex): - 210 liters tuned to 37 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 34 Hz, HP filter 29 Hz - 245 liters tuned to 32 Hz: balanced response, general-purpose (recommended); -3 dB approx. 27 Hz, HP filter 22 Hz - 275 liters tuned to 29 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 25 Hz, HP filter 20 Hz
High-excursion vented woofer / subwoofer, touring bass bin; weight-critical installs
AES Power: 1200 W,
Continuous: 2400 W,
Peak: 4800 W.
Sensitivity: 99.14 dB (1W/1m).
