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Thinking About Adding A New Subwoofer? The KEF “Subtember” Sale Has Begun

The KEF Subtember Sale has begun and there is a free $200 KEF KW-1 Wireless Subwoofer Adapter with each purchase of a qualifying subwoofer.

KEF Subwoofers

Every home theater setup needs a great subwoofer, but it doesn’t always have to be the biggest or the most expensive. Throughout the month of September, KEF is running its “Subtember” sale. If you purchase a select KEF subwoofer at the regular price, you get a free kit (model KW-1) that enables you to connect your subwoofer to a home theater receiver wirelessly. The normal price of the KW-1 is $199.99. Eliminate the wire clutter and enjoy the added low end performance and enhanced soundstage that a KEF subwoofer can deliver.

The qualifying KEF subwoofers include the Kube 8b, 10b, 12b, KC62, and the KF92 (a total of five subwoofers to choose from). Let’s take a brief look at what each one offers, and then we will look at the features and specifications of the KW-1 Wireless Subwoofer Kit

KEF KF92 Subwoofer
KEF KF92 Subwoofer

KEF KF92

Design: Uni-Core Force Cancellation. Two drivers are positioned back to back. This cancels out reactive forces which stress conventional subwoofers. 

Driver: Two 9-inch drivers

Amplifier Type: Class-D

Power Output: 1000W RMS (2 x 500W RMS)

Frequency Response: 11Hz – 200Hz (-3dB)

Maximum Output (SPL): 110dB

Variable Low Pass Filter (Crossover): 40Hz – 140Hz, LFE

Inputs: RCA phono sockets Speaker level inputs

Output: RCA phono sockets

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Power Requirements: 100V – 120V / 220V – 240V ~ 50 / 60Hz

Weight: 20 Kg/44 lbs

Dimensions (H x W x D) With Rear Panel and Feet:  352.5 x 330 x 360.5 mm (13.9 x 13 x 14.2-inches)

Price: $1,999.99 from KEF, Amazon, Crutchfield and authorized dealers.


KEF KC62 Subwoofer
KEF KC62 Subwoofer

KEF KC62

See our full report about the KEF KC62 subwoofer here.

Design: Uni-Core Force Cancellation (refer to KF92 explanation)

Driver: Two 6.5-inch drivers

Amplifier Type: Class-D

Power Output: 1000W RMS (2 x 500W RMS)

Frequency Response: 11Hz – 200Hz (±3dB)

Maximum Output (SPL): 105dB

Variable Low Pass Filter (Crossover): 40Hz – 140Hz, LFE

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Inputs: RCA phono sockets Speaker level inputs

Output: RCA phono sockets

Line Output High Pass Filter: 40Hz – 120Hz, Bypass

Power Requirements: 100V – 120V / 220V – 240V ~ 50 / 60Hz

Weight: 14kg (30.9Ibs)

Dimensions (H x W x D) with Rear Panel and Feet: 246 x 256 x 248 mm (9.7 x 10.1 x 9.8 in)

Price: $1,499.99 from KEF, Crutchfield, Amazon and Authorized KEF Dealers


KEF Kube Series Subwoofers
KEF Kube Series Subwoofers

KEF Kube Series Subwoofers

ModelKube 8bKube 10bKube 12b
Price$599.99$749.99$899.99
Type/DesignPowered/SealedPowered/SealedPowered/Sealed
Driver1 x 200mm (8-inches)1 x 250mm (10in.)1 x 300mm (12in.)
Amplifier TypeClass DClass-DClass-D
Power Output (RMS)300 Watts300 Watts300 Watts
Frequency Response34Hz – 140Hz (-6dB)24Hz – 140Hz (±3dB)22Hz – 140Hz (±3dB)
Maximum Output (SPL)105dB111dB114dB
Variable Crossover40Hz – 140Hz & LFE40Hz – 140Hz & LFE40Hz – 140Hz & LFE
InputsRCA phono sockets, Speaker level inputsRCA phono sockets Speaker level inputsRCA phono sockets Speaker level inputs
Power Requirements100V – 120V / 220V – 240V ~ 50 / 60Hz100V – 120V / 220V – 240V ~ 50 / 60Hz100V – 120V / 220V – 240V ~ 50 / 60Hz
Weight 11.3kg (25 lbs)11.3kg (25 lbs)20.6kg (35.5 lbs)
Dimensions (with rear panel and feet)293 x 293 x 310mm (11.5 x 11.5 x 12.2in.)293 x 293 x 310mm (11.5 x 11.5 x 12.2in.)410 x 393 x 410mm (16.1 x 15.5 x 16.1in.)

KEF Kube Pricing

Kube 8b: $599.99 from KEF, Crutchfield, Amazon and Authorized KEF Dealers

Kube 10b: $749.99 from KEF, Crutchfield, Amazon and Authorized KEF Dealers

Kube 12b: $899.99  from KEF, Crutchfield, Amazon and Authorized KEF Dealers

KEF KW1 Wireless Subwoofer Kit
KEF KW1 Wireless Subwoofer Kit

KW-1 Wireless Subwoofer Adapter Kit

Radio Transmission/Reception Frequency: 5.2GHz and 5.8GHz

Bit Depth/Sampling Rate: 24bit/48KHz

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Latency: <17ms

Transmission/Reception Range: Max 100ft (Line of Sight)

Frequency Response: 20Hz-22kHz

Signal-To-Noise-Ratio: >80dB

Total Harmonic Distortion  (THD): -90dB

Dimension (H x W x D)

  • Transmitter: 21.4 x 72 x 79.5-mm (1 x 2.83 x 3.13-inches)
  • Receiver: 27 x 37 x 72-mm (1 x 1.46 x 2.83-inches)

Price: Free during Subtember 2022 Sale, Regular $199.99 from KEF, Crutchfield, Amazon and Authorized KEF Dealers.

Tip: You connect the transmitter of the KW-1 to a subwoofer output on a home theater receiver or another audio component with subwoofer output and then connect the KW-1 receiver to the line or LFE input on a KEF subwoofer and you are set to go – you have added wireless audio signal reception to your subwoofer. 

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