The Nettuno S181 is a compact, high-performance active subwoofer designed to deliver tight, controlled low-frequency reinforcement for professional systems. Powered by a 1000 W RMS amplifier and a robust 18” ferrite driver with a double 4” voice coil, it offers strong output and clean extension from 40 Hz upward. Built for versatility and consistency, the S181 integrates smoothly into both standalone setups and larger Nettuno L28-based systems.
OVERVIEW
Nettuno S181: scalable, discreet, perfect.
The Nettuno S181 is an active 18” subwoofer designed to provide clean, reliable low-frequency reinforcement in compact professional systems. Its single 18” ferrite driver, built around a dual 4” voice coil, is powered by a 1000 W RMS amplifier module, delivering a solid peak output of 133 dB and a usable bandwidth starting at 35 Hz. Designed to offer controlled, articulate low end, the S181 performs effectively both as a standalone subwoofer and as part of multi-unit configurations.
An integrated DSP section streamlines deployment, offering presets that adapt the S181 to different system layouts and applications. Whether used in small PA setups, mobile rigs, or fixed installations, it provides consistent behavior and predictable tuning. With its straightforward connectivity and compatibility with Nettuno T and L28 systems, the S181 delivers a scalable, uniform low-frequency foundation for a wide range of productions.
FEATURES
1000W RMS class D amp
134 dB SPL
1x 18” LF transducer with 2x 4” V.C.
Plywood enclosure with polyurea finish
Cardioid preset and delay selection
SPECIFICATION SHEET
Acoustical Data
Speaker Type
Vented Enclosure – Stereo Subwoofer
Frequency Response [-6 dB]
40Hz – 100Hz
Max SPL
134dB
LF
18″ – 2 x 4″ V.C.
Amplifier
Amp Class
D
RMS Power
1000 W
Peak Power
2000 W
Cooling
Conventional
DSP
Advanced Functions
FIR filters
DSP
ADAU 1701 – 24/48 Bit
AD/DA Converter
24Bit / 48kHz
Controls
MAIN LEVEL
USER/SERVICE SWITCH
LINK/X-OVER SWITCH LIMITER/SIGN./ STATUS/ON LEDS
USB C-TYPE PORT
DELAY SELECTION
CARDIOID CONFIGURATIONS
Connectors
POWERCON TRUE1 IN/OUT 110-240V AC
Enclosure
Dimensions
W x H x D
720 x 560 x 700 mm
[14,02” x 24,21” x 13,78”]
Weight
51.5 Kg
113.54 Lbs
Cabinet
PLYWOOD 15/18mm – POLYUREA COATING
APPLICATION
The Nettuno S181 is designed for a wide range of low-frequency reinforcement needs, from compact PA setups to more structured professional systems. Its controlled response and ample output make it effective in corporate events, live music, conferences, and fixed installations where clean, reliable low end is required. In larger productions, the S181 integrates smoothly with Nettuno L28, supporting ground-stacked and cardioid arrangements to maintain consistent low-frequency coverage. Its performance and flexibility make it a solid choice for outdoor events, theatres, concert halls, houses of worship, and any venue that benefits from dependable sub-bass support.
