R400b vs Kube 10 MIE
The Kube 10 MIE's low-frequency extension is 24 Hz against the R400b's 26 Hz and its woofer 10" against 9". Both share sensitivity (111 dB) and high-frequency extension (140 Hz).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersSubwoofersPowered LoudspeakersDiscontinued
Estimated price (community-sourced)
$650
Around — community and catalog average, updates slowly
About the R400b
The KEF R400b is a powered subwoofer featuring twin 9-inch bass drivers, each powered by a 250W class-D amplifier, totaling 500W of power. It is designed to deliver deep bass with a frequency response of 26Hz to 140Hz (-6dB) and a maximum output of 111dB. The subwoofer includes a variable fourth-order low-pass filter adjustable from 40Hz to 140Hz, allowing for precise integration with other speakers. It also features phase adjustment (0 or 180 degrees) and an equalization switch offering 0, 6, or 12dB of boost around the 40Hz region. The R400b is available in high-gloss finishes of black or white and is built with a sealed design to minimize vibration.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 111 dB SPL @ 1W/1m
- Frequency Response
- 26 Hz - 140 Hz
- Power Handling
- 500W
Power Specifications
Amplification power output and characteristics
- Amplifier Class
- D
Speaker Design
Driver configuration and enclosure design
- Driver Size
- 9"
- Driver Count
- 2
- Enclosure Type
- sealed
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 365 × 351 × 330 mm (W × H × D)
- Weight
- 21.5 kg (47 lbs)
Key Specifications
Sensitivity: 111 dB
Frequency: 26-140 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions