Q Acoustics 2070Si Subwoofer, Graphite

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 4 weeks from our supplier
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  • International delivery not available


We want you to be happy with your purchase. If you're not, depending on the type of product, you can make free returns 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. Find out more about returns.

You'll find returns information on your delivery note. Unless faulty, we'd like you to make your return within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.

Q & As

Rated 5 out of 5 by 1 reviewer.
Rated 5 out of 5 by Perfect bit of kit! This is just what I was after. If you have purchased any of the other Q acoustics range of audio equipment then don't hesitate to buy this. It looks great and the sound it produces is accurate and responsive. The only thing to be careful about is its size which is larger than you think it is going to be, so watch out! 26 July 2013
  • 2016-05-03 T10:39:12.222-05:00
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£199.95 - £334.95

  • 2 year guarantee included

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