U12i-Sub : Multipurpose Subwoofer.

Ultra Compact 12" Installation Subwoofer

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U12i-Sub Size Comparison
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U12i-Sub Size Comparison

12" neodymium ultra low distortion woofer, extended frequency response down to 38 Hz (-6 dB)

  • The U12i is a 12” installation subwoofer that provides powerful low frequency Response from a slim size. Low port compression and optimised enclosure design give a tight, accurate bass response that is ideally suited for installation applications with limited space where high Quality, high output bass is required.

Main Features

  • 12″ neodymium ultra low distortion woofer
  • Slim design optimised for installations
  • Extended frequency range: 38 Hz – 150 Hz (-6 dB)
  • Power handling: 800 W (AES)
  • Maximum SPL 130 dB (peak)
  • Optional accessories for wall and ceiling installations
  • System impedance optimised for smaller LINUS Loudspeaker Management Amplifiers

This post is also available in: Deutsch (German)

State-of-the-art drivers

The U12i-Sub is equipped with an extremely long excursion 12” neodymium ultra low distortion woofer. The neodymium motor delivers extreme high magnetic flux for increased efficiency. The 3” voice coil is 26 mm high, ensuring ultra linear excursion of 16 mm/pp at consistent magnetic force.

State-of-the-art carbon-fiber cone ensures maximum stiffness and low moving mass.

The aluminum shorting rings reduce intermodulation distortion, minimise induction variation while reducing thermal compression. This design dramatically reduces the distortion of a typical subwoofer at longer excursion levels, and improves the overall sound quality and performance characteristics of the cabinet.

System solution

The U12i-Sub is designed to work exclusively with CODA Audio LINUS amplifiers as an integrated solution for DSP control, amplification, network remote control and diagnostic.  The integrated solution ensures optimal performance and protection. 

Matching the Impedance of Speakers and Amplifiers

Although U12i can work with all LINUS amplifiers, the 4 Ohm speaker impedance is optimised to draw more current from a smaller amplifier like LINUS12-C delivering uncompromised high output at reduced system cost.


The U12i-Sub is perfectly suited as a sub-extension for the HOPS, CoRAY and D-Series systems and can be used in variety of installations where high performance but slim, less visible design is required.

Typical applications are Houses of Worship, Theatres, Small clubs and live sound events.


Type: Ultra Compact 12″ Installation Subwoofer
Application: Small venues
Frequency response (-6 dB): 38 Hz – 150 Hz
Power handling (AES/peak): 800 W / 3200 W
Sensitivity 1 W / 1 m:* 95 dB
Maximum output peak:* 130 dB
Amplification, Cabinets per Amplifier:
LINUS5-C Optimum / Maximum: 4/8
LINUS10-C Optimum / Maximum: 4/8
LINUS12C Optimum / Maximum: 4/8
LINUS14 Optimum / Maximum: 4/8
Components: 12″ ultra low distortion woofer, 3″ (77 mm) voice coil, 800 W (AES) each
Nominal impedance: Ω (1+/1-)
Input connectors: 1x Neutrik™ NL4MP
Suspension:  M6 threaded points
Enclosure material: Birch plywood
Finish: Polyurea coating
IP rating (IEC 60529): IP54
Weather protection options: Standard IP55: IP55 (direct cable)
MG1 (Marine Grade 1): IP55
Dimensions (WxHxD): 580 x 342 x 350 mm / 22.83 x 13.46 x 13.78″
Net weight: 15 kg / 33.07 lb

*Measured with pink noise 6 dB crest factor. Half-space loading.



U12i-Sub Data Sheet (English)Download 
U12i-Sub Datenblatt (Deutsch)Download 
U12i-Sub CAD Drawing 2DDownload 
U12i-Sub CAD Drawing 3DDownload 
U12i-Sub Acessories - DrawingsDownload 


CODA Audio Weather Protection Download 

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