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KEF Kube 8b (Black)


In-store Clearance item

Open Box Guide Price (1 available across all stores) £354 .950000
Last brand new price £419 .000000

Please remember

These are Clearance items and therefore condition and accessories / promo items supplied may vary. This is also why we use guide prices for in-store items, as managers price these units according to state and completeness.

Please call / email the store to check the price / stock / condition and reserve your Clearance bargain before making a special journey.

Unfortunately, due to costs, and size, TVs can't be mail ordered from store or transferred between stores - sorry!

Please note that extended guarantees are not available on these products.

Compare (3 max)
Deep bass from a compact cabinet – the KEF Kube 8b is a room-friendly subwoofer.

iBX for powerful bass you can feel

KEF’s Kube subwoofers feature iBX (Intelligent Bass Extension) for the deepest bass from the most compact cabinets. The iBX algorithm creates an extended depth of bass that easily exceeds expectations for this size of sub. Backing this up is a powerful 300 watts, Class-D amplifier. This is enough to power the high quality 8" bass unit to high levels and low frequencies. With effortless bass on tap, the Kube 8b is ideal for both movies and music.

Power, controlled
Despite its high power rating, the KEF Kube is about more than just firepower. The sealed cabinet not only offers high levels of rigidity but also gives a tight, controlled bass that's never overblown or sloppy. A 3-position DSP (EQ) control allows adjustment of the Kube's response to compensate for different room acoustics and personal preference. There's also a phase switch. This lets you reverse the phase, giving perfectly timed bass whether the sub is in front or behind you.

Effortlessly stylish
Most subs deserve to be hidden away, but not the Kef Kube! Featuring smooth lines, a wrap-around grille and gloss black top panel, the Kube 8b is one subwoofer you’ll be happy to have on display. Being the smallest in the range, the Kube 8b is also easy top to fit in tight spaces and ideal for smaller rooms.

Compact yet powerful, the KEF Kube 8b offers a punchy sound without the bulk.
Speaker Type Enclosure - Filter
Infinite baffle sealed
Crossover Frequency (Hz)
40 - 140
Driver Units
8 inch driver
Frequency Response (Hz)
34 - 140
Power Rating (Watts)
Auto On/Off
Dimensions WxHxD (mm)
310 x 293 x 293mm
Weight (KG)
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  • Representative 21.9% APR (variable)
  • Purchase rate 21.9% p.a. (variable)
  • Assumed credit limit £1,200
Subject to status. Terms and conditions apply. Richer Sounds Limited acts as a broker and offers credit solely from PayPal (Europe) S.a rl et Ice, S.C.A, 22-24 Boulevard Royal, L-2449, Luxembourg.
Klarna Payment Badge

Pay in 3 interest-free payments so you can spread the cost. No fees.

  • Add item(s) to your cart
  • Go to checkout and choose Klarna 
  • Enter your debit or credit card information.
  • To check your eligibility, Klarna will perform a soft search with a credit reference agency. This will not affect your credit score.
  • Spread the cost in 3 interest-free payments. The first payment is made at point of purchase, with the remaining 2 payments scheduled automatically every 30 days. No fees.

You must be 18+ to use this credit offer. Credit subject to status. T&Cs apply. Klarna uses soft searches with credit reference agencies. These do not affect your credit rating. Missed payments can affect your ability to use Klarna. Pay in 3 installments complete terms.

Buy now, pay later available in-store or by phone, on items over £500

We offer 6 and 10-month options.

Call your local store or our telesales team for details

For purchases over £500, you can settle the balance in 6 months, and in 10 months on purchases over £1000 and pay no interest whatsoever. If you settle part of your loan in the deferral period you won’t pay interest on that part. You can still pay off the loan sooner if you make additional payments. If you’d rather spread the cost over 36 months, you can set up a loan repayment plan when the payment-free period comes to an end at 19.9% APR representative. A one-off settlement fee of £29 will be applied. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. Richer Sounds Limited acts as a credit broker and not the lender. Barclays Partner Finance acts as the lender. Find out more information and eligibility criteria here.