All speakers, Wireless speakers

Silverback Sub Duo

Bass expansion unit

A compact bass expansion unit that partners with Sub Solo for deeper, more even low-frequency performance across the room.
DKK 5.999
3 payments of DKK 2.000 at 0% interest with Klarna. Learn more
Free shipping / Easy return within 45 days / 7-year factory warranty

Silverback Sub Duo is not a standalone subwoofer. It is the perfectly matched partner to Sub Solo, created to extend bass performance and improve low-frequency coverage in the room.

Used together, Solo and Duo deliver more depth, more precision, and a more even bass response than a single larger subwoofer. The result is not simply more bass, but better bass: cleaner, more controlled, and easier to integrate into everyday living spaces.

Silverback Sub Duo requires Silverback Sub Solo to work.

  • Total amplifier power: Powered by Sub Solo
  • Frequency range: 17–250 Hz
  • Wireless connection: —
  • Analog inputs: 4-pin mini-DIN
  • Outputs: —
  • Recommended placement: Floor, corner, or wall
  • Dimensions (W × H × D): 42 × 31 × 20.5 cm
  • Finish: White satin / Black satin
  • Standby power consumption: —
  • Packaging: Single
  • Requires Sub Solo: Yes
  • Wall mount / built-in wall bracket: Built-in wall bracket
  • Included cable: 10 m interconnect cable
  • Woofer: 1 × Silverback Vulcano 8 inch
  • Amplifier: None (powered by two amplifiers in Sub Solo)

Download manual

Requires to work: Silverback Sub Solo
Connection: 4-pin mini-DIN to Sub Solo
Interconnect cable: 10 meter cable included
Adjustment and room correction handled in SA Cockpit via the Sub Solo-based system

  • 1 x subwoofer
  • Rubber feet for floor placement
  • Power cable
  • 10 meter Interconnect cable
  • Fabric front grille
  • Quick start guide

45-day risk-free trial in your own home

Hear it. Feel it. Live with it.

Hear your favourite songs again – in your own space, on your own terms. Start your 45-day listening journey today.

Hear your favourite songs again – in your own space, on your own terms. Start your 45-day listening journey today.

45-day risk-free trial in your own home

Hear it. Feel it. Live with it.

Hear your favourite songs again – in your own space, on your own terms. Start your 45-day listening journey today.

Hear your favourite songs again – in your own space, on your own terms.
Start your 45-day listening journey today.

When you want more than enough.
Sub Duo builds on what you already love –
adding depth, pressure, and presence to
the music you feel and the films you lose
yourself in.

When you want more than enough. Sub Duo builds on what you already love – adding depth, pressure, and presence to the music you feel and the films you lose yourself in.

All your music. Streamed wirelessly in true hi-fi quality

All your music. Streamed
wirelessly in true hi-fi quality.

Made for the way you listen now.
And everything still to come.

Made for the way you listen now.
And everything still to come.

Begin with a pair of speakers. Add deeper bass, surround sound, or expand your setup as your listening deepens. Because the sound that moves you should grow with you.

Begin with a pair of speakers. Add deeper bass, surround sound, or expand your setup as your listening deepens. Because the sound that moves you should grow with you.

Questions before you listen?

All System Audio speakers deliver satisfying bass on their own, but a subwoofer adds extra depth, scale, and cinematic weight when you want more.
Open the SA Cockpit app, start room correction, and follow the steps in the app. It adapts the sound to the room and only needs to be redone if the speakers move.

Read more about the SA Cockpit app
Placement depends on the model, but in general the system performs best when the speaker is positioned for the room it is made for. Check the technical specifications for the model-specific recommendation.
Two smaller subwoofers can work with the room more evenly than one bigger subwoofer. Sub Duo is designed to improve bass distribution and control.
Use the SA Cockpit app to adjust level, crossover, distance, and room correction.

Read more about the SA Cockpit app
Yes. All System Audio speakers are designed to grow with you, so you can begin with stereo and expand with a subwoofer or more speakers later.
Register your product within 6 months of purchase to activate the 7-year factory warranty. Read the full terms and register on the warranty page.
Yes. Delivery is free when you place your order, and returns are free within the 45-day trial period. If you need to use your warranty after those 45 days, shipping costs are covered by the customer.

See our Terms & Conditions for all details.

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