Martin Audio Blackline Q218
Direct Radiating
Dual-Drive 18" Subwoofer
Blackline Q218 is a high-performance, dual-driver subwoofer designed to complement BlacklineQ Series full-range loudspeakers. It extends the system’s low-frequency response down to 38 Hz, delivering powerful bass performance with a Peak SPL of 142dB (148dB for crest factor 4) for exceptional low-end impact.
Description
Blackline Q218 features dual 18” (460 mm) drivers with 4” (100 mm) voice coils, housed in a robust plywood enclosure finished in hard-wearing black paint. A perforated, impact-resistant steel grille protects the drivers, while slot ports ensure efficient airflow and reduced turbulence for cleaner low-frequency performance.
Designed for flexible deployment, Q218 can be used singly, stacked or flown via integral M10 inserts. It includes an M20 1.4” (35 mm) pole-mount fitting for seamless integration with other loudspeakers in BlacklineQ series. There are two signal link outputs—one positioned at the top and one at the bottom of the enclosure when oriented vertically. This allows for flexible, discreet and tidy signal connections to other BlacklineQ loudspeakers, regardless of setup.
Four ergonomic side handles facilitate easy handling and rubber feet on the base align with top-surface recesses to ensure stable stacking. A castor kit is available as an optional accessory.
When used with BlacklineQ Series full-range systems, crossover and EQ functions can be managed via the DX0.4, DX0.6, or DX4.0 system controllers, or the onboard DSP of an iKON amplifier.
Blackline Q218 Features
- Dual-driver, direct radiator subwoofer
- 2 x 18” (460mm) drivers with 4” (102mm) voice coils
- Peak SPL of 142dB (148dB for crest factor 4)
- Durable plywood enclosure
- Slot ports for reduced air noise
- Perforated steel grille
- M20 / 1.4” (35mm) pole-mount socket
- 4Ω nominal impedance Integral ergonomic handles
- Feet for vertical or horizonal operation
- Rebate recesses for stable horizontal stacking
- M10 flying inserts
- Fittings for optional castors
- Three NL4 connectors
Resources & Downloads
Data sheets, manuals and resources for the Blackline Q218
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Quick Specs
- TYPE
- High-performance, dual 18" driver subwoofer
- FREQUENCY RESPONSE (4PI)
- 38 Hz – 100 Hz ± 3 dB, -10 db @ 31 Hz
- DRIVER
- 2 x 18” (460 mm) with 4” (100 mm) long excursion voice coil, ferrite motor system
- RATED POWER
- 1600 W AES, 6400 W peak
- REQUIRED ELECTRONICS
- Processor and amplifier, or a combined amplifier-processor unit
Technical Specifications
- TYPE
- High-performance, dual 18" driver subwoofer
- FREQUENCY RESPONSE (4PI)
- 38 Hz – 100 Hz ± 3 dB, -10 db @ 31 Hz
- DRIVER
- 2 x 18” (460 mm) with 4” (100 mm) long excursion voice coil, ferrite motor system
- RATED POWER
- 1600 W AES, 6400 W peak
- REQUIRED ELECTRONICS
- Processor and amplifier, or a combined amplifier-processor unit
- RECOMMENDED ELECTRONICS
- DX0.4, DX0.6 or DX4.0 system processor and VIA amplifier, or iKON amplifier-processor
- SENSITIVITY
- 104 dB
- MAXIMUM SPL
- 136 dB continuous, 142 dB peak, 148 dB peak with crest factor 4
- NOMINAL IMPEDANCE
- 4 ohm
- DISPERSION
- Omnidirectional
- CROSSOVER
- Not applicable
- ENCLOSURE
- Durable plywood
- FINISH
- Black textured paint
- PROTECTIVE GRILLE
- Black perforated steel grille with scrim cloth backing
- CONNECTORS
- 3 x NL4 connectors: 2 at bottom rear (input and link A), 1 at top rear (link B)
- PIN CONNECTIONS (INPUT)
- 1+/1–
- PIN CONNECTIONS (LINK A)
- 1+/1– to 1+/1– and 2+/2– to 2+/2–
- PIN CONNECTIONS (LINK B)
- 2+/2– on input to 1+/1– on link B
- FITTINGS
- 24 x M10 inserts: 4 on top, 4 on bottom, 6 on left, 6 on right, 4 on rear, 16 x M8 inserts on rear for optional castors, 4 x bar handles with recycled ABS pockets: 2 on top, 2 on bottom, M20 top-mounted thread plate for pole mounting, 4 x skids on base: for standing vertically, 4 x skids on right side, 4 x recesses on left side: for stacking horizontally
- DIMENSIONS
- (W) 536 mm x (H) 1206 mm x (D) 690 mm, (W) 21.1 in x (H) 47.5 in x (D) 27.2 in
- WEIGHT
- 82.5 kg (181.9 lbs)
- ACCESSORIES (OPTIONAL)
- M10 eye bolt HTKCT06, transit cover, Wind-up telescopic pole ASF20071, Set of four castors WHEELKIT
Blackline Q218 features dual 18” (460 mm) drivers with 4” (100 mm) voice coils, housed in a robust plywood enclosure finished in hard-wearing black paint. A perforated, impact-resistant steel grille protects the drivers, while slot ports ensure efficient airflow and reduced turbulence for cleaner low-frequency performance.
Designed for flexible deployment, Q218 can be used singly, stacked or flown via integral M10 inserts. It includes an M20 1.4” (35 mm) pole-mount fitting for seamless integration with other loudspeakers in BlacklineQ series. There are two signal link outputs—one positioned at the top and one at the bottom of the enclosure when oriented vertically. This allows for flexible, discreet and tidy signal connections to other BlacklineQ loudspeakers, regardless of setup.
Four ergonomic side handles facilitate easy handling and rubber feet on the base align with top-surface recesses to ensure stable stacking. A castor kit is available as an optional accessory.
When used with BlacklineQ Series full-range systems, crossover and EQ functions can be managed via the DX0.4, DX0.6, or DX4.0 system controllers, or the onboard DSP of an iKON amplifier.
- Dual-driver, direct radiator subwoofer
- 2 x 18” (460mm) drivers with 4” (102mm) voice coils
- Peak SPL of 142dB (148dB for crest factor 4)
- Durable plywood enclosure
- Slot ports for reduced air noise
- Perforated steel grille
- M20 / 1.4” (35mm) pole-mount socket
- 4Ω nominal impedance Integral ergonomic handles
- Feet for vertical or horizonal operation
- Rebate recesses for stable horizontal stacking
- M10 flying inserts
- Fittings for optional castors
- Three NL4 connectors
| TYPE | High-performance, dual 18" driver subwoofer |
| FREQUENCY RESPONSE (4PI) | 38 Hz – 100 Hz ± 3 dB, -10 db @ 31 Hz |
| DRIVER | 2 x 18” (460 mm) with 4” (100 mm) long excursion voice coil, ferrite motor system |
| RATED POWER | 1600 W AES, 6400 W peak |
| REQUIRED ELECTRONICS | Processor and amplifier, or a combined amplifier-processor unit |
| RECOMMENDED ELECTRONICS | DX0.4, DX0.6 or DX4.0 system processor and VIA amplifier, or iKON amplifier-processor |
| SENSITIVITY | 104 dB |
| MAXIMUM SPL | 136 dB continuous, 142 dB peak, 148 dB peak with crest factor 4 |
| NOMINAL IMPEDANCE | 4 ohm |
| DISPERSION | Omnidirectional |
| CROSSOVER | Not applicable |
| ENCLOSURE | Durable plywood |
| FINISH | Black textured paint |
| PROTECTIVE GRILLE | Black perforated steel grille with scrim cloth backing |
| CONNECTORS | 3 x NL4 connectors: 2 at bottom rear (input and link A), 1 at top rear (link B) |
| PIN CONNECTIONS (INPUT) | 1+/1– |
| PIN CONNECTIONS (LINK A) | 1+/1– to 1+/1– and 2+/2– to 2+/2– |
| PIN CONNECTIONS (LINK B) | 2+/2– on input to 1+/1– on link B |
| FITTINGS | 24 x M10 inserts: 4 on top, 4 on bottom, 6 on left, 6 on right, 4 on rear, 16 x M8 inserts on rear for optional castors, 4 x bar handles with recycled ABS pockets: 2 on top, 2 on bottom, M20 top-mounted thread plate for pole mounting, 4 x skids on base: for standing vertically, 4 x skids on right side, 4 x recesses on left side: for stacking horizontally |
| DIMENSIONS | (W) 536 mm x (H) 1206 mm x (D) 690 mm, (W) 21.1 in x (H) 47.5 in x (D) 27.2 in |
| WEIGHT | 82.5 kg (181.9 lbs) |
| ACCESSORIES (OPTIONAL) | M10 eye bolt HTKCT06, transit cover, Wind-up telescopic pole ASF20071, Set of four castors WHEELKIT |
About Penguin Media Solutions
Penguin Media Solutions is a professional audio, video, and lighting design, installation, and maintenance company based in Brighton, UK. As an authorised Martin Audio dealer, we provide high-performance AV systems for commercial venues, hospitality, and event spaces across Brighton, London, and South-East England.
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