Dual 18" Subwoofers
Choosing the right dual 18″ subwoofer for your system can be complex.
Let’s make it easy with our simple overview.
Good
IMPACT-X218B
Delivering value for money, IMPACT-X218B gives a big sonic punch…… for an affordable price.

1000 watts
AES (RMS)
- 137 dB max SPL @ 1 m
- 2.5″ voice coils
- MDF construction
- Combi connector inputs
- 1000 watts AES (RMS)
- 2000 watts Programme
- 4000 watts Peak
Better
DELTA-X218B
For more power, plywood construction and parallel/discrete modes, DELTA-X218B is ‘better’!

1600 watts
AES (RMS)
- 138 dB Max SPL @ 1 m
- 4.0″ voice coils
- Plywood construction
- Parallel (4Ω) & Discrete (2 x 8Ω) modes
- 1600 watts AES (RMS)
- 3200 watts Programme
- 6400 watts Peak
Best
Installation
GPL-218B
Need even more power? GPL-218B is perfect for fixed installs where the ground needs to rumble!

2000 watts
AES (RMS)
- 148 dB Max SPL @ 1 m
- 4.0” voice coils
- Plywood construction
- Barrier strip & NL2 inputs
- 2000 watts AES (RMS)
- 4000 watts Programme
- 8000 watts Peak
Best
Touring
Reason-X218B
Built for the road, Reason-X218B has been made to be as easy to transport as possible with 4 practical handles.

2000 watts
AES (RMS)
- 148 dB Max SPL @ 1 m
- 4.0” voice coils
- Plywood construction
- 4 x handles
- 2000 watts AES (RMS)
- 4000 watts Programme
- 8000 watts Peak
Best
Touring & Install
WLA-218BX
There’s no going back. WLA-218BX features the ability to be configured in an Inverted Stack Gradient array (iSGA)

2000 watts
AES (RMS)
- 148 dB Max SPL @ 1 m
- 4.0” voice coils
- Plywood construction
- 4 x handles
- iSGA configuration
- 2000 watts AES (RMS)
- 4000 watts Programme
- 8000 watts Peak
Model Name | IMPACT-X218B | Delta-X218B | GPL-218B | Reason-X218B | WLA-218BX |
---|---|---|---|---|---|
System Type | Passive | Passive | Passive | Passive | Passive |
Configuration | 2 x 18" Subwoofer | Dual Chamber Subwoofer | Dual Bass-Reflex Subwoofer | 2 x 18" Subwoofer | 2 x 18" Subwoofer |
Freq Response (+/-3 dB) | 35 Hz-1.2 KHz | 30 Hz -1.5 KHz | / | 30 Hz-1 KHz | 30 Hz-800 Hz |
Freq Range (-10 dB) | 30 Hz-1.5 KHz | 25 Hz -1.5 KHz | 25- 100 Hz | 25 Hz-800 HZ | 25 Hz-800 Hz |
Sensitivity (2.83 v / 1 m) | 101 dB | 100 dB | 109 dB (half space) | 109 dB | 109 dB |
Calc. Max SPL @ 1 m | 137 dB | 138 dB | 148 dB (half space) | 148 dB | 148 dB |
System Rated Impedance | 4 Ω | Parallel: 4 Ω Discrete: 8 Ω x 2 | 4 Ω | 4 Ω | 4 Ω |
LF Transducer | |||||
Size | 2 x 470 mm / 18" | 2 x 470 mm / 18" | 2 x 470 mm / 18" | 2 x 470 mm / 18" | 2 x 470 mm / 18" |
Voice Coil Size | 65 mm / 2.5” | 102 mm / 4" | 102 mm / 4" | 102 mm / 4” | 102 mm / 4" |
Rated Impedance | 2 x 8 Ω | 2 x 8 Ω | 2 x 8 Ω | 2 x 8 Ω | 2 x 8 Ω |
LF Power (re:AES2-2012) | 2 x 500 W | 2 x 800 W | 2 x 1000 W | 2 x 1000 W | 2 x 1000 W |
Power | |||||
System Continuous Power | 1000 W | 1600 W Parallel / 800 W Discrete | 2000 W | 2000 W | 2000 W |
System Programme Power | 2000 W | 3200 W Parallel / 1600 W Discrete | 4000 W | 4000 W | 4000 W |
System Peak Power | 4000 W | 6400 W Parallel / 3200 W Discrete | 8000 W | 8000 W | 8000 W |
Enclosure | |||||
Input Connector | 2 x NL2 combi jack | 2 x NL4 (speakON Compatible) | 2 x speakON 2 x barrier stip | 2 x speakON compatible | 3 x NL4 (speakON compatible) (2 rear, 1 front) |
Hardware | No | No | No | No | No |
Handles | 2 | 4 | 4 | 4 | 4 |
Enclosure Material | 18 mm MDF | 18 mm plywood | 18 mm plywood | 18 mm plywood | 18 mm plywood |
Colour Options | Black paint | Rhino Rock | Black paint, White on request | Black paint | Black paint |
Grille Material | Steel | Steel | Steel | Steel | Steel |
Dims - Unpacked | |||||
Height | 554 mm / 21.81" | 541 mm / 21.3” | 560 mm / 22.0" | 560 mm / 22.0” | 560 mm / 22.0" |
Width Front | 1222 mm / 48.11" | 1041 mm / 41.0” | 1065 mm / 41.9" | 1065 mm / 41.9” | 1065 mm / 41.9" |
Width Rear | 1222 mm / 48.11" | 1041 mm / 41.0” | 1065 mm / 41.9" | 1065 mm / 41.9” | 1065 mm / 41.9" |
Depth | 606.5 mm / 23.88" | 650 mm / 25.6” | 756 mm / 29.8" | 756 mm / 29.8” | 756 mm / 29.8" |
Dims - Packed | |||||
Height | 628 mm / 24.72" | 626 mm / 25.6" | 638 mm / 25.1" | 668 mm / 26.3” | 638 mm / 25.1" |
Width Front | 1295 mm / 50.98" | 1126 mm / 44.3" | 1138 mm / 44.8" | 1138 mm / 44.8” | 1138 mm / 44.8" |
Width Rear | 1295 mm / 50.98" | 1126 mm / 44.3" | 1138 mm / 44.8" | 1138 mm / 44.8” | 1138 mm / 44.8" |
Depth | 685 mm / 26.97" | 722 mm / 28.4" | 829 mm / 32.6" | 829 mm / 32.6” | 829 mm / 32.6" |
Weight | |||||
Net Weight | 78.9 kg / 173.58 lbs | 78.9 kg / 173.9 lbs | 75.0 kg / 165 lbs | 73.8 kg / 162.4 lbs | 75.0 kg / 165 lbs |
Gross Weight | 83.1 kg / 182.81 lbs | 86.0 kg / 189.6 lbs | 87.7 kg / 192.9 lbs | 87.7 kg / 192.9 lbs | 87.7 kg / 192.9 lbs |