Definitive Audio Koala 18Aw Sub
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Essential Information About the KOALA W SUB 18 Active Subwoofer
Essential Information About the KOALA W SUB 18 Active Subwoofer
- Powerful and Deep Bass: Frequency response from 30 Hz to 150 Hz and max SPL of 128 dB to support a sound system with impact.
- Class D Amplification: 600 W RMS (1200 W PROG / 2400 W Max) for excellent efficiency and reliable performance during events.
- Adjustable Low-Pass Filtering: 80 Hz to 120 Hz adjustment to properly match your satellite speakers.
- Designed for Mobility: MDF wooden enclosure, ergonomic side handles, and 35 mm pole mount for stand mounting.
Manufacturer Information
Definitive Audio
https://www.definitiveaudio.co.uk
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KOALA W SUB: The Natural Extension of the KOALA W Series, Designed for the Stage
The KOALA W series is expanded with the KOALA W SUB range, developed around a wooden enclosure to deliver remarkable acoustic reproduction, especially in the low-frequency spectrum. The goal is clear: to offer active subwoofers that are powerful, high-performing, and feature an ultra-modern design, while maintaining an ideal balance between sound quality, reliability, versatility, and mobility.
Available in 3 sizes (12'', 15'', and 18''), the series allows easy system sizing depending on the context: discreet bass reinforcement, DJ setup, or live sound requiring more level and foundation. The KOALA W SUB 18 stands as the most generous solution in the range for applications demanding breath and reserve.
What Uses Is the KOALA W SUB 18 Designed For?
The KOALA W SUB 18 is aimed at users who want to regain a physical and controlled bass, whether in DJ sets, hosting, events, rehearsals, or on small to medium stages. Its role is to lighten the workload of the main speakers by leaving the mid-high frequencies to them, while entrusting the sub with reproducing the lowest frequencies.
Thanks to its adjustable low-pass filter and XLR connectivity with LINK output, it easily integrates into a typical audio chain: mixer, processor, DJ controller or mixer, then distribution to the sound system. It is a relevant choice if you seek more presence on kicks, synth basses, and impacts without sacrificing the clarity of the rest of the mix.
Performance, Settings, and Design: What Makes the Difference
At the heart of the series are high-quality aluminum speakers paired with Class D amplification. This combination aims for efficient and dynamic reproduction, with excellent stability when levels rise and energy demand becomes significant.
Adjustable Low-Pass Filter: A Clean Crossover with Your Speakers
The adjustable low-pass filter from 80 Hz to 120 Hz allows adapting the cutoff point depending on your speakers and the venue's acoustics. A well-chosen setting improves system coherence: the bass remains present but better controlled, and the overall sound gains definition.
XLR Connectivity and Direct Control
The KOALA W SUB 18 offers 2 female XLR inputs and a LINK output with 2 male XLRs to daisy-chain the signal to other elements (satellites, other subwoofers, etc.). The level knob facilitates balancing the sub relative to the rest of the system to achieve firm bass without masking the mix.
Mobility and Stand Integration
The MDF enclosure with black paint finish is designed for regular use, while the ergonomic handles on each side simplify handling. The standard 35 mm pole mount allows installing a speaker stand directly above the subwoofer, convenient for optimizing sound dispersion and saving floor space.
Technical specifications
| Bluetooth | No | ||
| Type | active subwoofer | Handles | ergonomic, on each side |
| Amplifier type | Class D | Mains connection | SHUCKO |
| Aluminum loudspeaker | 18'' with 4'' voice coil | Master switch | ON/OFF |
| Adjustable low-pass filter | 80 Hz - 120 Hz | Ground lift switch | yes |
| Max SPL | 128 dB | Input voltage selector | 110/220 V |
| Volume control | level potentiometer | Dimensions (W x H x D) | 610 x 745 x 680 mm |
| Standard stand mount | 35 mm | Weight | 38.7 kg |
Questions frequently asked
Is the Definitive Audio Koala 18Aw Sub suitable for a DJ or live setup?
The Class D amplification and the 18-inch aluminum speaker with a 4-inch voice coil are designed to support DJ applications, events, and small to medium-sized stages. The maximum stated SPL level reaches 128 dB.
What cutoff frequency should be set on this subwoofer?
The low-pass filter is adjustable from 80 Hz to 120 Hz to match the crossover with the main speakers.
What XLR connections are available?
The rear panel includes 2 female XLR inputs. A LINK output on 2 male XLR connectors allows for daisy-chaining the signal to other system components. A level control knob adjusts the subwoofer volume.
Is the 18-inch subwoofer easy to transport?
With its ergonomic side handles, handling is easier. Its weight is 38.7 kg and its dimensions are 610 x 745 x 680 mm.
Can a speaker be mounted on the subwoofer?
The standard 35 mm pole mount allows for mounting a speaker stand on top of the subwoofer. The cabinet is made of MDF with a black paint finish.



