Sonance SGS 8.1 Pack
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Overview
The SGS 8.1 Pack from Sonance includes eight satellite speakers, a buried subwoofer, and a DSP 2-150 MKIII amplifier. This configuration can cover outdoor spaces up to 325 m², providing uniform sound distribution.
Technical Design and Materials: Where Durability Meets Performance
Each SGS satellite integrates a 19mm polyurethane dome tweeter paired with a 98mm anodized aluminum woofer. This material combination is not coincidental: anodized aluminum naturally resists corrosion while maintaining its acoustic properties, while the Santoprene suspension—a vulcanized thermoplastic elastomer—maintains speaker integrity against extreme thermal variations. This construction allows the speakers to operate in a temperature range from -29°C to 88°C.
The high-temperature ABS enclosures represent a deliberate technical choice. Unlike conventional plastics that can deform or become brittle, the ABS used here maintains its mechanical properties even under intense summer heat. The satellite speakers adopt a compact cylindrical form measuring 418mm in height by 114.8mm in diameter, weighing only 2.4kg each. This lightness facilitates positioning and adjustment during installation.
The SGS subwoofer forms the sonic foundation of the system with its 254mm dual voice coil driver. The polypropylene cone, a material recognized for its rigidity and lightness, reproduces low frequencies from 35Hz to 100Hz with remarkable precision. The high-density polyethylene (HDPE) enclosure resists not only corrosion but also chemicals present in soil and impacts from gardening tools. At 19kg with generous dimensions (631mm total height), this subwoofer requires a pit approximately 380mm in diameter and 442mm deep, leaving only the protective cap exposed.
The Pivoting Mount System: Directional Precision and Installation Flexibility
The main innovation of the SGS 8.1 Pack lies in its adjustable vertical pivot mounting system. Each satellite features a rotating joint that allows precise orientation of sound dispersion toward listening areas. This feature, often absent on competing systems at equivalent price points, radically transforms the approach to outdoor sound reinforcement.
The standard 1/2” NPS (National Pipe Standard) threading ensures compatibility with a vast range of mounting accessories. The included stakes allow rapid ground installation, but the system also accepts wall mounts, tree fixtures, or mast mounts available separately. This versatility addresses varied architectural and landscape constraints: elevated terraces, sloped gardens, wooded areas, or paved zones.
The locking mechanism firmly maintains the chosen orientation, resisting vibrations and strong winds. Installers particularly appreciate the ability to readjust the angle after installation without dismounting the entire system.
Electrical Configuration and Amplification: Wiring Simplicity, Performance Complexity
The DSP 2-150 MKIII amplifier represents the system’s brain. With 150 watts per channel at 8 ohms (224 watts at 4 ohms), it provides comfortable power reserves to drive the entire system. Its 24-bit/96kHz digital-to-analog converter processes high-resolution audio signals up to 4608 kbps, ensuring faithful reproduction of modern digital sources.
Class-D technology offers 93% energy efficiency, minimizing heat dissipation and power consumption. The integrated SonARC v2 DSP processor provides hundreds of equalization presets and a 10-band parametric equalizer, allowing acoustic response adaptation to each installation’s specific characteristics. IP and infrared connectivity facilitate integration into existing home automation systems.
Daisy-chain wiring constitutes a technical particularity of the SGS 8.1 Pack. The satellites connect in parallel, alternating between left and right channels to create a distributed stereo field. With individual impedance of 30 ohms, four satellites per channel present a nominal load of 7.5 ohms to the amplifier—an ideal value that optimizes power transfer without stressing the electronics. The subwoofer, equipped with two 8-ohm coils, connects to any point in the chain without affecting overall impedance thanks to its internal filters.
Installation and Implementation: Between Apparent Simplicity and Technical Precision
SGS 8.1 Pack installation follows methodical logic. Planning begins with spacing satellites every 2.4 to 3 meters for optimal coverage. The subwoofer ideally finds its place at the geometric center of the area, though positioning it closer to a wall significantly reinforces low frequencies through acoustic coupling.
The recommended 14/4 direct burial cable resists moisture and soil chemical attacks. Trenches 10 to 13cm deep generally comply with local codes while protecting cables. The manual details a loop technique with cable ties that facilitates connections while serving as strain relief.
Satellite orientation after installation represents the critical step often overlooked. Unlike omnidirectional speakers that disperse sound uniformly, the SGS allows sculpting the sound field. Directing tweeters toward main listening areas improves intelligibility, while upward orientation creates a more diffuse ambiance for receptions.
Technical Specifications
SGS Satellite Speakers
- Tweeter: 19 mm polyurethane dome
- Woofer: 98 mm anodized aluminum cone with Santoprene surround
- Frequency response: 80 Hz – 20 kHz ±3 dB
- Impedance: 8 ohms nominal
- Power: 50 W minimum, 200 W maximum
- Sensitivity: 87 dB @ 2.83 V / 1 meter
- Enclosure material: non-corrosive, heat-resistant ABS
- Mounting thread: 1/2” NPS
- Dimensions: 418 mm (height) x 171 mm (depth)
- Speaker diameter: 114.8 mm
- Weight: 2.4 kg each
SGS Subwoofer
- Woofer: 254 mm dual voice coil, polypropylene with Santoprene surround
- Frequency response: 35 Hz – 100 Hz ±3 dB
- Crossover frequency: 100 Hz
- Impedance: 8 ohms per coil, 8-ohm system
- Power: 200 W
- Sensitivity: 90 dB @ 2.83 V / 1 meter
- Enclosure material: non-corrosive HDPE
- Dimensions:
- Cap width: 380 mm
- Enclosure width: 310 mm
- Cap height: 189 mm
- Enclosure height: 442 mm
- Total height: 631 mm
- Weight: 19 kg
System and Installation
- Perfectly balanced 8-ohm system
- Even coverage for comfortable listening up to 325 m²
- Full 8.1 setup on a single two-channel amplifier
- Expandable up to a 16.2 configuration
- 1/2” NPS threading compatible with Sonance accessories: ground stakes, tree mounts, wall mount
- Adjustable mounting pivot for precise sound positioning
- Wide sound dispersion with removable grille
- Sealed enclosure, heat- and corrosion-resistant
Included Configuration
- 8 x SGS satellite speakers
- 8 x ground stakes
- 1 x SGS subwoofer
- 1 x DSP 2-150 MKIII amplifier
Frequently Asked Questions
Can the system work with amplifiers other than the included DSP 2-150 MKIII?
The SGS 8.1 Pack accepts any stereo amplifier capable of handling an 8-ohm load. However, the included DSP 2-150 MKIII amplifier offers specific Sonance presets and digital processing optimized for these speakers. Users can also integrate the system with platforms like Sonos Amp or Denon HEOS, but will lose certain acoustic correction features.
What is the actual maximum coverage area?
The advertised 325 m² corresponds to ideal conditions in open space. Terrain configuration, presence of walls or dense vegetation, and ambient noise level influence effective coverage. For complex or L-shaped gardens, adding additional satellites (up to 16 total) maintains sonic homogeneity.
How does the system resist harsh winter conditions?
The materials support temperatures down to -29°C, but installation must provide drainage around the buried subwoofer to prevent water accumulation that could freeze. O-rings and waterproof connectors protect electronics, but additional protective covering for the subwoofer during winterization extends its lifespan in regions with particularly harsh winters.
Can Garden Series speakers be mixed with other Sonance ranges?
The Garden Series system operates autonomously to guarantee tonal balance. Mixing with other series would create timbre and level disparities. To extend coverage, use exclusively the SGS SAT 4 PACK and SGS SUB extension packs designed specifically to maintain sonic consistency.
Does the DSP 2-150 MKIII amplifier require special ventilation?
Thanks to its 93% Class-D efficiency, the amplifier generates little heat. A 5cm space above and on the sides suffices in a standard 1U rack. Installation in unventilated confined spaces remains inadvisable, particularly in hot regions where ambient temperature may exceed 40°C.
How can the system be optimized for different event types?
The amplifier’s SonARC v2 processor offers presets adapted to various situations: ambient music, dance parties, speeches. The 10-band parametric equalizer allows fine adjustments. For receptions with conversations, slightly reducing low frequencies improves vocal intelligibility without sacrificing musical quality.
- Eco-contribution included in the sale price.
- Manufacturer reference: 93571
