KEF Reference Sub-8B Overview

The KEF Reference Sub-8B Powered Subwoofer delivers powerful and precise bass performance in a force-cancelled closed box design. With dual 9-inch LF drive units, it achieves a frequency range reaching as low as 18Hz in free-space mode, ensuring deep and impactful bass response. The subwoofer is equipped with two 500W Class D amplifiers featuring a switched mode power supply and DSP-based control section, providing efficient and controlled power delivery. The variable low pass filter allows customization between 40Hz to 160Hz with selectable slopes of 12dB/oct, 18dB/oct, and 24dB/oct. Additionally, the LFE mode, set at 350Hz with an 18dB/oct slope, enhances compatibility with LFE-equipped systems. The subwoofer offers versatile connectivity with analog XLR, speaker level inputs, and an RCA phono socket for linking. Its net internal volume is 23L, contributing to its compact yet potent design. While the KEF Reference Sub-8B impresses with its ability to reach a maximum output of 110dB, it is worth noting the substantial power consumption at 1000W, which users should consider in their setup.

KEF Reference Sub-8B: Top 10 Key Features

1. Design: The KEF Reference Sub-8B features a force-cancelled closed box design, ensuring precise and controlled bass performance.

2. LF Drive Unit: Equipped with 2 x 225 mm (9in.) low-frequency drive units, the subwoofer delivers powerful and impactful bass.

3. Frequency Range: Achieves an impressive frequency range of 18Hz at -6dB output in free-space mode, providing deep bass extension.

4. Frequency Response: The frequency response at 90dB output in free-space mode is ±3dB from 24Hz, ensuring accurate and balanced bass reproduction.

5. Amplifier: Powered by 2 x 500W Class D amplifiers with a switched mode power supply and DSP-based control section, delivering efficient and controlled power.

6. Maximum Output: Capable of reaching a maximum output of 110dB at 1m and 50Hz, providing a dynamic and immersive bass experience.

7. Low Pass Filter: Features a variable low pass filter with a frequency range from 40Hz to 160Hz, allowing users to customize the crossover point.

8. Variable Slope: Offers variable slope options for the low pass filter at 12dB/oct, 18dB/oct, and 24dB/oct, enabling fine-tuning of the subwoofer's integration with the main speakers.

9. LFE Mode: Includes an LFE mode set at 350Hz with an 18dB/oct slope, enhancing compatibility with LFE-equipped systems.

10. Inputs and Connectivity: Provides versatile connectivity options with analog XLR socket, speaker level inputs, and a link out via RCA phono socket. The subwoofer's net internal volume is 23L.

KEF Reference Sub-8B: Common Questions

Q1: What are the key features of the KEF Reference Sub-8B Powered Subwoofer?

A1: The KEF Reference Sub-8B boasts a powerful 8-inch long-throw bass driver, a 300W Class-D amplifier, sealed cabinet design, adjustable low-pass filter, and phase control for precise bass response. It's constructed with high-density fiberboard (HDF) and offers various elegant finishes.

Q2: What is the advantage of a sealed cabinet design in the KEF Reference Sub-8B?

A2: The sealed cabinet design minimizes distortion, ensuring tight and controlled bass output. It also allows for more accurate bass reproduction, making it ideal for music enthusiasts and home theater setups.

Q3: How does the adjustable low-pass filter work?

A3: The adjustable low-pass filter allows you to fine-tune the subwoofer's bass response. You can customize the frequency at which the subwoofer starts reproducing bass, ensuring seamless integration with your main speakers.

Q4: Can the KEF Reference Sub-8B be used in small rooms?

A4: Yes, the compact size of the KEF Reference Sub-8B makes it suitable for a wide range of room sizes, including smaller spaces. It delivers powerful bass even in more confined areas.

Q5: Is the KEF Reference Sub-8B available in different finishes?

A5: Yes, the KEF Reference Sub-8B is available in various elegant finishes, allowing you to choose the one that best matches your room's aesthetics.

Q6: Where can I buy the KEF Reference Sub-8B Powered Subwoofer?

A6: You can purchase the KEF Reference Sub-8B from authorized KEF retailers and select audio equipment stores. Online retailers and the KEF official website also offer this subwoofer.

Q7: What is the price range for the KEF Reference Sub-8B?

A7: The price of the KEF Reference Sub-8B can vary based on factors like location and retailer. It's recommended to check with authorized dealers or online stores for current pricing and any available discounts.

Q8: Does the KEF Reference Sub-8B come with a warranty?

A8: Yes, KEF products typically come with a manufacturer's warranty. Be sure to check the warranty details and terms provided by the retailer or KEF's official website for specific coverage information.

Q9: Can the KEF Reference Sub-8B be used with different brands of main speakers?

A9: Yes, the KEF Reference Sub-8B can be used with main speakers from various brands. It's designed to complement and enhance the bass performance of your existing audio setup.

Q10: Is the KEF Reference Sub-8B suitable for both music and home theater applications?

A10: Absolutely, the KEF Reference Sub-8B is versatile and enhances the sound quality for both music and home theater systems, delivering immersive and enjoyable audio experiences.

KEF Reference Sub-8B Spec