R18S
R18S
R18S is a powerful active stereo subwoofer designed to complement Montarbo's B and R series loudspeakers, delivering deep, impactful bass for both portable and fixed systems. Its 18-inch driver provides punchy bass, while the integrated DSP allows for level, crossover, and polarity adjustments for seamless integration. With versatile inputs, LINK/XOVER routing, and a robust polyurea-coated enclosure, the R18S ensures reliable, tour-ready performance with ample low-frequency reach.
APPLICATION
R18S is ideal for enhancing Montarbo B and R series loudspeakers with deep, authoritative bass in portable and installed sound systems. Its extended low-frequency response and high SPL make it perfect for music playback, live performance, DJ setups, and small-to-medium venue applications.
Thanks to its stereo operation and flexible DSP controls, R18S integrates seamlessly into ground-stacked PA systems, multi-speaker arrays, or mobile setups. Built for touring durability and practical deployment, it provides reliable, professional-grade low-frequency reinforcement for demanding portable and live sound applications.
OVERVIEW
Deep, Touring-Ready Bass
R18S is a professional active stereo subwoofer engineered to enhance Montarbo B and R series full-range speakers. Its 18” low-frequency driver with 4” voice coil delivers deep, precise bass down to 41 Hz, providing the low-end foundation required for music, live performance, and portable PA systems. The system reaches a maximum SPL of 131.5 dB, ensuring impact and clarity across small to medium venues.
Powered by a Class D amplifier platform rated at 500 W RMS / 1000 W peak, R18S offers responsive low-frequency output with ample headroom. Its passive radiator design ensures extended low-end performance while eliminating the need for active cooling, making it highly reliable for repeated transport and prolonged use.
Onboard DSP—including 28/56-bit processing and 24-bit / 48 kHz AD/DA conversion—provides precise control over level, crossover frequency, and polarity, enabling smooth integration with main PA speakers. Connectivity includes dual Combo inputs for stereo operation and XLR line output for LINK + XOVER configuration, facilitating flexible system expansion and multi-subwoofer setups.
Constructed from multilayer wood with protective polyurea finish, the cabinet is designed for durability and ease of transport. Measuring 510 × 650 × 690 mm and weighing 38 kg, R18S delivers professional-grade low-frequency reinforcement while remaining practical for portable and touring applications.
FEATURES
Active stereo subwoofer designed for B and R series full-range speakers
18” LF driver delivering deep, controlled low-end impact
Integrated DSP with level, crossover, and polarity control for precise integration
Flexible connectivity with dual Combo inputs and XLR LINK + XOVER output
Robust multilayer wooden cabinet with polyurea finish for reliable portable use
Acustical Data
Speaker Type
Active Stereo Subwoofer
Frequency response [-10 dB]
41 Hz to cut frequency
Max SPL
131.5 dB
LF
18″ – 4″ VC
AMPLIFIER
Amp Class
D
RMS Power
500 W
Peak Power
1000 W
Cooling
Passive radiator
DSP
Connettors
CH1/CH2: Combo,
LINE OUT: XRL-M (LINK+XOVER)
DSP
28/56 Bit
AD/DA Converter
24Bit / 48kHz
Controls
LEVEL,
XOVER selection,
POLARITY selection
ENCLOSURE
Dimensions
W x H x D
510 x 650 x 690 mm
[20” x 25.6” x 27.2”]
Weight
38 kg [83.8 lb]
Cabinet
Multilayer plywood with polyurea finish