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
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
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
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
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
| Model | Kube 8b | Kube 10b | Kube 12b |
| Price | $599.99 | $749.99 | $899.99 |
| Type/Design | Powered/Sealed | Powered/Sealed | Powered/Sealed |
| Driver | 1 x 200mm (8-inches) | 1 x 250mm (10in.) | 1 x 300mm (12in.) |
| Amplifier Type | Class D | Class-D | Class-D |
| Power Output (RMS) | 300 Watts | 300 Watts | 300 Watts |
| Frequency Response | 34Hz – 140Hz (-6dB) | 24Hz – 140Hz (±3dB) | 22Hz – 140Hz (±3dB) |
| Maximum Output (SPL) | 105dB | 111dB | 114dB |
| Variable Crossover | 40Hz – 140Hz & LFE | 40Hz – 140Hz & LFE | 40Hz – 140Hz & LFE |
| Inputs | RCA phono sockets, Speaker level inputs | RCA phono sockets Speaker level inputs | RCA phono sockets Speaker level inputs |
| Power Requirements | 100V – 120V / 220V – 240V ~ 50 / 60Hz | 100V – 120V / 220V – 240V ~ 50 / 60Hz | 100V – 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
KW-1 Wireless Subwoofer Adapter Kit
Radio Transmission/Reception Frequency: 5.2GHz and 5.8GHz
Bit Depth/Sampling Rate: 24bit/48KHz
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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