Bass Series
Reference 8b Subwoofer
A dual 9-inch driver subwoofer with Force-Cancelling technology for unparalleled bass control.
Dual 500W Class D Amplifiers
The Reference 8b is a truly exceptional subwoofer, delivering extraordinary bass precision and control with zero distortion.
Technical Specifications
SpecificationsGeneral
CABINET FINISH
- Black Piano Lacquer
WEIGHT
- 34 kg (75 lbs)
DIMENSIONS
- H x W x D: 398 x 365 x 429 mm (15.7 x 14.4 x 16.8 in)
INPUTS
- RCA phono jacks
- Analog XLR input
- Speaker-level inputs
FREQUENCY RANGE
- Free field: 18 Hz (-6 dB)
FREQUENCY RESPONSE
- 24 Hz @ 90 dB output in free field (±3 dB)
NET INTERNAL VOLUME
- 23 L
MAXIMUM OUTPUT
- 110 dB (peak SPL at 1 m, 50 Hz)
AMPLIFIER TYPE
- 2 x 500W Class D with switched-mode power supply and DSP-based control section
DRIVERS
- LF: 2 x 225 mm (9 in)
POWER REQUIREMENTS
- 100V - 120V / 220V - 240V ~50/60Hz
POWER CONSUMPTION
- 1000 W
EXTERNAL LINK
- RCA headphone output
LOW-PASS FILTER
- Variable frequency: 40 Hz to 160 Hz
- Variable slope: 12 dB/octave, 18 dB/octave, 24 dB/octave
- LFE mode: 350 Hz, 18 dB/octave
T2 Subwoofer
The T2 subwoofer delivers powerful bass that defies its compact size, adding weight and clarity to the low end for a immersive 3D soundstage.
Slim Profile Subwoofer
Compact and easily concealed, the T2 delivers fast, precisely focused bass thanks to a built-in 250W Class D amplifier and a 250mm (10-inch) driver.
Technical Specifications
SpecificationsGeneral
DESIGN
- Active sealed subwoofer
DRIVERS
- 1 x 250 mm (10 in)
Acoustics
FREQUENCY RESPONSE
- 30 Hz – 250 Hz
LOW-PASS FILTER
- Fixed 250 Hz, 2nd order
Amplification & Inputs
AMPLIFIER TYPE
- 250 W built-in – Class D
INPUTS
- RCA (low-level)
Power & Dimensions
POWER REQUIREMENTS
- 100–240 V ~ 50/60 Hz
INTERNAL VOLUME
- 12.7 L
DIMENSIONS (H x W x D)
- 380 x 370 x 177 mm (15.6 x 14.6 x 7.0 in)
WEIGHT
- 13 kg (28.6 lbs)
MAXIMUM OUTPUT
- 110 dB (SPL)
KW1 Wireless Subwoofer Adapter Kit
Comprising a discrete transmitter and receiver, the KEF KW1 works with Kube, KC62, and KC92 subwoofers. It allows optimal placement of KEF subwoofers without cable constraints. High-quality wireless transmission delivers every ounce of detail and impact from your favorite movies and music.
The receiver is also available separately, enabling two KEF subwoofers to receive the same wireless signal from a single transmitter.
Technical Specifications
SpecificationsKey Parameters
RADIO FREQUENCY
- 5.2 GHz and 5.8 GHz
SAMPLE RATE
- 24-bit, 48 kHz
LATENCY
- < 17 ms
RANGE
- Up to 30 meters (line of sight)
FREQUENCY RESPONSE
- 10 Hz – 20 kHz
SIGNAL-TO-NOISE RATIO
- >80 dB
DISTORTION
- Typically -90 dB
Power & Signal
TRANSMITTER INPUT POWER
- 5 V DC, 1 A
TRANSMITTER INPUT SIGNAL
- 2 V
OUTPUT AUDIO SIGNAL
- 2 V
Dimensions
TRANSMITTER
- 21.4 × 72 × 79.5 mm
RECEIVER
- 27 × 37 × 72 mm
KC92 Subwoofer
The compact yet powerful KC92 features two 9-inch Force-Cancelling drivers, delivering incredible depth and power with exceptional precision.
Dual 9-inch Drivers
With 1000W RMS amplification and optimized by KEF’s Music Integrity Engine®, the KC92 delivers thrilling, ultra-dynamic bass.
Technical Specifications
SpecificationsGeneral
DRIVERS
- 2 x 9-inch drivers
AMPLIFIER TYPE
- Built-in Class D
Dimensions & Weight
- Dimensions (H x W x D): 352.5 x 330 x 360.5 mm
- Weight: 20 kg
Electrical Specifications
POWER REQUIREMENTS
- 100–240 V ~ 50/60 Hz
POWER CONSUMPTION
- 1000 W (operating power)
- < 0.5 W (standby power)
Accessories
ADDITIONAL ACCESSORY
- KW1 Wireless Subwoofer Adapter Kit
KC62 Subwoofer
The KC62 is an incredibly compact subwoofer that delivers the power and magic of deep, precise bass — creating immersive experiences in music, movies, and games.
The Biggest Little Subwoofer
Featuring revolutionary Uni-Core® technology and dual 6.5-inch drivers, the KC62 offers astonishing power with 1000W RMS, delivering bass of incredible depth and accuracy.
Technical Specifications
SpecificationsGeneral
DRIVERS
- 2 x 6.5-inch drivers
AMPLIFIER TYPE
- Built-in Class D
Dimensions & Weight
- Dimensions (H x W x D): 246 x 256 x 248 mm
- Weight: 14 kg
Electrical Specifications
POWER REQUIREMENTS
- 100–240 V, 50/60 Hz
POWER CONSUMPTION
- 1000 W (operating power)
Color
- Carbon Black
- Mineral White
- Titanium Grey
Kube 15 MIE
A 15-inch front-firing active subwoofer designed to produce the deepest bass for music and movies — ideal for large rooms and immersive audio experiences.
Kube 15 MIE Active Subwoofer
Equipped with a 15-inch driver and a 300W Class D amplifier to achieve the deepest bass possible. Optimized for exceptional depth and dynamics through the Music Integrity Engine®.
Technical Specifications
SpecificationsDesign
TYPE
- Active subwoofer (sealed)
DRIVERS
- 1 x 380 mm (15 in)
Frequency Response
FREQUENCY RANGE
- 20 Hz – 140 Hz (±3 dB)
AMPLIFIER
- Class D, 300 W RMS
Variable Filter & Inputs
LOW-PASS FILTER
- 40 Hz – 140 Hz, LFE mode
INPUTS
- RCA phono jacks, speaker-level inputs, KW1 expansion port
Power Consumption
POWER REQUIREMENTS
- 100 – 240 V, 50/60 Hz
POWER CONSUMPTION
- 300 W
Dimensions & Weight
DIMENSIONS
- 519 x 500 x 515 mm (20.4 x 19.7 x 20.3 in)
WEIGHT
- 27.5 kg
Kube 12 MIE
A 12-inch front-firing active subwoofer delivering rich, powerful bass for music and movies — ideal for creating an immersive soundstage in any room.
Kube 12 MIE Active Subwoofer
Equipped with a 12-inch driver and a 300W Class D amplifier to produce deep, powerful bass. Optimized for outstanding depth and dynamics through the Music Integrity Engine®.
Technical Specifications
SpecificationsDesign
TYPE
- Active subwoofer (sealed)
DRIVERS
- 1 x 300 mm (12 in)
Frequency Response
FREQUENCY RANGE
- 22 Hz – 140 Hz (±3 dB)
AMPLIFIER
- Class D, 300 W RMS
Variable Filter & Inputs
LOW-PASS FILTER
- 40 Hz – 140 Hz, LFE mode
INPUTS
- RCA phono jacks, speaker-level inputs, KW1 expansion port
Power Consumption
POWER REQUIREMENTS
- 100 – 240 V, 50/60 Hz
POWER CONSUMPTION
- 300 W
Dimensions & Weight
DIMENSIONS
- 410 x 393 x 410 mm (16.1 x 15.5 x 16.1 in)
WEIGHT
- 18.6 kg
Kube 10 MIE
A 10-inch front-firing active subwoofer offering excellent extension and control — perfect for compact and medium-sized rooms where quality sound matters.
Kube 10 MIE Active Subwoofer
Equipped with a 10-inch driver and a 300W Class D amplifier to deliver deep bass. Optimized for dynamic depth and performance through the Music Integrity Engine®.
Technical Specifications
SpecificationsDesign
TYPE
- Active subwoofer (sealed)
DRIVERS
- 1 x 250 mm (10 in)
Frequency Response
FREQUENCY RANGE
- 24 Hz – 140 Hz (±3 dB)
AMPLIFIER
- Class D, 300 W RMS
Variable Filter & Inputs
LOW-PASS FILTER
- 40 Hz – 140 Hz, LFE mode
INPUTS
- RCA phono jacks, speaker-level inputs, KW1 expansion port
Power Consumption
POWER REQUIREMENTS
- 100 – 240 V, 50/60 Hz
POWER CONSUMPTION
- 300 W
Dimensions & Weight
DIMENSIONS
- 370 x 353 x 370 mm (14.6 x 13.9 x 14.6 in)
WEIGHT
- 15.4 kg
Kube 8 MIE
An 8-inch front-firing active subwoofer ideal for small rooms, yet delivering powerful, deep bass. Despite its compact size, it delivers stunning sound quality through premium components.
Kube 8 MIE Active Subwoofer
With an 8-inch driver and a 300W Class D amplifier, the Kube 8 MIE demonstrates exceptional bass control. The Music Integrity Engine® optimizes dynamic depth and sonic quality.
Technical Specifications
SpecificationsDesign
TYPE
- Active subwoofer (sealed)
DRIVERS
- 1 x 200 mm (8 in)
Frequency Response
FREQUENCY RANGE
- 34 Hz – 140 Hz (-6 dB)
AMPLIFIER
- Class D, 300 W RMS
Variable Filter & Inputs
LOW-PASS FILTER
- 40 Hz – 140 Hz, LFE mode
INPUTS
- RCA phono jacks, speaker-level inputs, KW1 expansion port
Power Consumption
POWER REQUIREMENTS
- 100 – 240 V, 50/60 Hz
POWER CONSUMPTION
- 300 W
Dimensions & Weight
DIMENSIONS
- 293 x 293 x 310 mm (11.5 x 11.5 x 12.2 in)
WEIGHT
- 9.4 kg
KSK92 Subwoofer Stacking Kit
The KSK92 stacking kit enables the easy combination of up to three KC92 subwoofers into a single powerful unit, enhancing performance and output without consuming excessive floor space.
KSK92 Subwoofer Mounting Kit
This kit is ideal for vertically stacking KC92 subwoofers using simple threaded inserts. Installation is quick and significantly boosts your subwoofer system’s output power.
Technical Specifications
SpecificationsFrame Dimensions
FRAMES (H x W x D)
- 360 mm x 15 mm x 10 mm (14.2 in x 0.6 in x 0.4 in)
Soft Layer Dimensions
DIMENSIONS (H x W)
- 310 mm x 262 mm (12.2 in x 10.3 in)
Weight
KIT WEIGHT
- 0.41 kg (0.9 lbs)
