Q Acoustics 2070Si Subwoofer, Graphite

Never knowingly undersold

Product information

Q Acoustic’s 2070Si Subwoofer channels thumping bass, adding serious power to your sound system. With a central focus on Digital Signal Processing (DSP), this design excels at its delivery of distortion-free audio that clamps down on noise. Packed with super-efficient class-D amplification, twin-cone design and an intuitive Speaker Type Function Control, this subwoofer will take your system up a notch.

Digitally-Enhanced Delivery
Like far pricier subwoofers, the 2070Si is completely angled towards DSP. This means that all the filtering and limiting function in the digital domain, making the playback extra-crisp. The system’s state-of-the-art precision gives superior sonic performance and enhanced flexibility.

Speaker Type Function Control
With its digital core, the 2070Si is far more versatile. Using the Speaker Type switch, you can toggle the settings depending on whether you’re using bass reflex (ported) or infinite baffle (sealed) speakers. This way, your sound will always be optimised.

Twin Cones Create Serious Power
This innovative subwoofer uses two smaller cones rather than one large one for added depth. The twin cones offer the same rumble as a large one, but produce bass faster, improving timing and sonic accuracy. Furthermore, the digital amplifier’s 150W capability will deliver home-filling volumes.

Deluxe Construction
This pair’s flush-mounted drive units and curved edges not only make it look stunning, it helps the sound too. Whether you want to add a punch to your movies or music, the 2070Si won’t let you down.

Q Acoustics
H425 x W195 x D560mm
Eligible for International Delivery

About Q Acoustics

Unlike many of its competitors, Q Acoustics is a young brand that labels its lack of heritage as the secret to their success. Founded in 2006, their speakers were called “some of the most forward-thinking products in existence” by What Hi-Fi? three years later.

Helmed by a team of highly-skilled businessmen, their aim is to produce superior speakers at an affordable price. By balancing advanced engineering concepts with reasonable costs, Q Acoustics’ products offer obscene audio quality without the obscene price. Backed by their ultra-modern outlook, they use cutting-edge processes to pack sublime sound into their diverse speaker ranges.


  • UK delivery

    Delivery in 7 days from our supplier
    Find out more
  • International delivery not available


If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 35 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

You can return for free in the UK via John Lewis shops, Royal Mail, Collect+ or MyHermes. If you need to arrange collection of large or heavy items, call us on 03456 049 049. For international returns queries, call us on +44 1698 545 454

You’ll find returns information on your delivery note. Exceptions apply to certain products - find out more about our refund policy

Q & As

£199.00 - £334.95

  • 2 year guarantee included

Product code :


Colour :


Out of stock Email me when available

Additional services

Find out more