Name: Blackline Q118
Rating: 4.7 (23 reviews)

Blackline Q118 is a compact, high-performance subwoofer designed for use with Blackline Q Series full-range loudspeakers. It extends the system’s low-frequency response down to 38Hz and delivers exceptional impact, with a peak SPL of 130dB (136dB with crest factor 4).

Features

Compact, direct-radiator subwoofer
1 x 18” (460mm) driver with 4” (102mm) voice coil
Peak SPL of 130dB (136dB with crest factor 4)
Durable plywood enclosure
Slot ports for reduced air noise
Perforated steel grille
M20 / 1.4” (35mm) pole-mount socket
8Ω nominal impedance
Integral ergonomic handles
Rebate recesses for stable vertical stacking
M10 flying inserts
Fittings for optional castors
Three NL4 connectors

Applications

Portable sound reinforcement
Live music clubs
Bars and restaurants
Nightclubs
Corporate AV events and conferences
Weddings and parties
Secondary stages at festivals
Houses of worship, leisure centres and retail outlets

Q118 features an 18” (460 mm) driver with a 4” (100 mm) voice coil, housed in a durable plywood enclosure finished in tough black paint. A perforated, impact-resistant steel grille protects the driver, while slot ports enhance efficiency and minimize noise turbulence.

Designed for versatile deployment, Q118 can be used individually, stacked or flown using integral M10 inserts. It also 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.

Ergonomic side handles ensure easy handling and rubber feet on the base align with top-surface recesses to provide secure and stable stacking. A castor kit is available as an optional accessory.

When paired 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.

Links

Datasheet User guide Brochure

Specification

Type	Compact, high-performance 18" subwoofer
Frequency response (4pi) [1]	38 Hz – 100 Hz ± 3 dB, -10 db @ 31 Hz
Driver	18” (460 mm) with 4” (100 mm) long excursion voice coil, ferrite motor system
Rated power [2]	800 W AES, 3200 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 [4]	95 dB
Maximum SPL [4]	124 dB continuous, 130 dB peak, 136 dB peak with crest factor 4
Nominal impedance	8 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)	1+/1– on input to 2+/2– on link B
Fittings	16 x M10 inserts: 3 on top, 3 on bottom, 3 on left, 3 on right, 4 on rear
	16 x M8 inserts on rear for optional castors
	2 x bar handles with recycled ABS pockets: 1 on each side
	M20 top-mounted thread plate for pole mounting
	4 x skids on base, 4 x recesses on top: for stacking vertically
Dimensions	(W) 530 mm x (H) 606 mm x (D) 690 mm
	(W) 20.9 in x (H) 23.9 in x (D) 27.2 in
Weight	45.5 kg (100.3 lbs)

Architectural Specs

Martin Audio Blackline Q118

The subwoofer shall be a passive, direct-radiating system. It shall feature a single 18” (460 mm) low-frequency driver with a 4” (102 mm) voice coil, housed in a durable plywood enclosure with slot ports to enhance efficiency and reduce air noise.

The on-axis frequency response shall be 38 Hz to 100 Hz (±3 dB), with low-frequency extension down to 31 Hz (–10 dB). The subwoofer shall be capable of producing a peak SPL of 130 dB (136 dB with crest factor 4) at 1 metre. Nominal impedance shall be 8 ohms. The system shall require external amplification and processing. For optimal performance, it shall be used in conjunction with a dedicated electronic controller such as a Martin Audio DX series processor, paired with a VIA series amplifier, or with an iKON series combined amplifier and processor.

The enclosure shall be finished in durable black paint and fitted with a perforated, impact-resistant steel grille. It shall include an M20 / 1.4” (35 mm) pole-mount socket for use with full-range loudspeakers and three NL4 connectors, one of which shall be positioned for linking when the Q118 is in a vertical orientation. The cabinet shall also include integral ergonomic side handles, M10 flying inserts and rebate recesses with rubber feet for secure vertical stacking. Fittings shall be provided for optional castors.

Dimensions (W x H x D) shall be 530 mm x 606 mm x 690 mm (20.9 in x 23.9 in x 27.2 in). Weight shall be 45.5 kg (100.3 lbs).

The loudspeaker shall be the Martin Audio Blackline Q118.

Technical Drawings & 3D Models