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Mobius 3i

The Mobius3i incorporates the same OptiDamping, OptiDrive and Reduced-Resonance Exciter technologies as the flagship Mobius7i in a smaller 300mm wide form factor. Suitable for residential and commercial background music applications where budgets are sensitive, and medium-level full bandwidth music when paired with a bass enhancer or subwoofer.

Product Description

The Mobius3i offers a smaller alternative to the Mobius5i and Mobius7i for use when there is limited stud/joist spacing. The Mobius3i can also be used to supplement Mobius speakers within a large project, providing a cost-effective solution for smaller rooms such as spare bedrooms or hallways. Rendered invisible behind a 2mm skim of plaster or other material, the Mobius3i uses the same OptiDriver and OptiDamping technology found on the flagship Mobius7i invisible loudspeakers. The new ‘i’ update provides significant acoustic upgrades with the introduction of brand new proprietry high frequency transducers, as well as increasing the speakers sensitivity and reducing impedance to 4ohms.

Example Applications

Invisible audio installations with space limitations. Distributed audio and medium-level listening within residential properties such as MDU’s. Costsensitive commercial background music applications. When paired with a subwoofer the Mobius3i can also be used for medium-level full-bandwidth music listening.

Frequency Response


The Backbox CV300 creates an acoustically tuned and consistent cavity behind the speaker, helping to ensure both consistent audio quality as well as minimising rearward airborne sound transmission where Mobius loudspeakers are installed into stud walls/ceiling.

The BackboxSW300 provides a strong mechanical fixing method for solid blockwork and concrete walls/ceilings.

Single-Channel Protection

All new slim-line design, giving reliable speaker protection for life-time worry free performance, in a unit that can be conveniently dressed back with any cable management system or sit neatly behind the rack.

Multi-Channel Protection

Both 8-channel and 16-channel passive rack-mounted protection units are available for Mobius Series Loudspeakers. For use in installations with higher numbers of low-impedance speakers with a centralised AV rack. Direct-to-PCB screw terminal-blocks allow for fast and easy permanent installation.


Nominal Impedance
4 Ohms
Power Handling
85dB 1m/2.83Vrms
85dB 1m/2.83Vrms
Frequency Response
87Hz - 19kHz (-6db)
Useable Frequency Range
67Hz - 31kHz (+/-10dB)
Electrical Connection
Blue butt-splice crimp terminals (14-16 AWG)
Product Weight
1.1kg (2lb 6oz)
Fixing Requirements
Backbox CV300 / SW300 or Mounting blocks
In-line Protection unit
400mm x 300mm x 35mm (153/4” x 1113/16” x 13/8”)
Rack-Mount Protection Unit
10 Years