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Addon C-SUB

Small in size, mighty in bass.

The wireless Addon C-SUB multiroom subwoofer is distinctively small, but delivers a massive punch that you really can feel. It’s a perfect 23cm cube of heart-pounding, definitive bass enjoyment. Wireless auto connect to the nearest Audio Pro multiroom speaker, or play old school with cable. Easy to place, easy to love. More bass to your music, with less wire clutter.


4,000 kr
Add to cart
(19 reviews)
Bass proof your home

For a deeper sensation of your music, the C-Sub matches perfectly with any Audio Pro multiconnected speakers. You can add as many C-SUB subwoofers as you like in your multiroom setup. In the app everybody can play their personal music on which ever speaker they want. Or all of them. Play from internet streaming services, from a computer or NAS in your network, or music on your phone. All controlled by our "easy-to-use" app.

Get the Audio Pro app for multiroom play.

Download here
Play nice. Everywhere.

Multiroom sound and multi person usage. Group and play, set to left/right for stereo pairs. Play all together. Or not. You choose.

Control the power.

Power is nothing without control. The Addon Sub has variable crossover and you can shift phase for easier placement and adjustment to your room.

Feel your music, physically.

Our focus since the beginning in 1978 has been better bass from small enclosures. Powered subwoofers is in our blood.

Technical Specification
Addon C-SUB
Amplifiers & Drivers

Amplifier: 200W Digital class D Woofer: 6.5” long throw
Passive radiators: 2 x 7.5"


Wi-fi + RCA in
Wireless Auto Connect for simple setup


Range: 30 - 120 Hz
Variable crossover: 50-120Hz
Variable phase: 0-180 degrees


HxWxD: 230 x 230 x 230 mm

Multiroom Functionality

Audio Pro Multiroom
Free app for iOS & Android

Network Compability

802.11 b/g/n, 2.4 GHz only

Audio formats

MP3, WMA, AAC, FLAC, Apple Lossless

19 reviews for Addon C-SUB
Torsten Joris

The perfect addon for my Audio-pro D-1

Andrei Radulescu
Claudio Ciano
jonathan doyle

Amazing sound and design . Compliments my c10 perfectly.

Patrick B.

Great sound but as always the wireless lets it down! Cable connection recommended!! Also poor instructions and no information on calibration or sound set up so it’s just trial and error. App has also started to crash again after latest update. Audio Pro need to understand it’s not just about looks and sound in today’s competitive market.


The Addon C-SUB looks and sound awesome and if you try to turn it on and then off, you can definitely feel the difference and how greatly it fills a room. If you connect it through the cable to a C5 or C10 the output improves greatly compared to a wireless connection, though. The only complain is software related: an updated quicker app could definitely improve the multi-room experience.

Paul Harrison

Great sound, badly let down by the antiquated app

Michael M.
Marco Massimo Bonaccorso

Purchased recently, it sounds really good and strong. I recommend connecting it via rca, for a better and controlled bass. After a setup that is not too long the system will bring out a much wider and deeper sound. I also thank audio pro for the excellent purchase offer.