KEF Reference Sub-8B Powered Subwoofer (Unit)

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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

KEF Reference Sub-8B Info Sheet

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We take full responsibility for delivering your expensive products without a scratch. In case of any physical damage or compromises we offer immediate replacement.

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We have the authorizations from the respective distributors of each brand to sell their products. Hence, you will get the due warranties on every product bought from us.

Technical Consultation

We encourage all our customers to consult with us before buying any high-fidelity equipment. We also offer obligation free on-site consultation for home theater setups in major cities.

Flexible Payment Options

Our COD option is limited to certain cities. However, we have the option to ship against partial payments

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Shipping Related Questions

It depends on where you are and what you are ordering. All types of speakers will take minimum 4-5 business days as per the delivery location. Products that are not magnetic can be delivered faster if customer agrees to bear air-freight cost.

At AV Kart, we work with reliable logistic partners to handle the deliveries of your expensive Hi-Fi products. 99% of all our deliveries happen smoothly across PAN India. However, at the times of unfortunate events when the delivered item has incurred any sort of damage, AV Kart gaurantees immediate replacement for the same without any questions asked. 

Please note that if the transit damage is limited to the packaging e.g. tampered boxes or broken thermocols then the product is not eligible for replacement until and unless there's any technical issue with it internally.

Product Related Questions

At AV Kart, we have a very limited inventory of Hi-Fi brands and that's becayse we have authorised dealerships for all the brands and products you see on our website. Every product is sourced from their respective official Indian distributors. Hence, whatever products you are going to order from us will be certainly 100% original.  We always urge our customers to request proof of dealership from any online sellers before buying anything online to ensure that you get the due warranties and service support.

Return and replacement both the options are not available in standard scenarios. However, If only the product you have received is faulty and the replacement is taking more than 3-4 weeks, we will accept the return and refund 100% amount. If the waiting period for replacement is within 4 weeks then we will try to supply our customers a standby product until the original one gets replaced.

Why Choose AV Kart?

There are many online stores nowadays who are selling Hi-Fi equipment. Some of them even displays lucrative disounts but here's how AV Kart is different from them - 

  1. Authorization - We are authorised dealers of each and every brand listed on our store. You will get proper service support and warranty on all the purchased products. You can always ask us for proof of dealerships for all of the listed brands.
  2. Expertise - We are among the only few online stores having years of experience with Hi-Fi equipment. You can ask us anything about your Hi-Fi home theater setup and you will get the right answer then and there. We have years of hands on experience working with top high-fidelity AV brands.
  3. On-Site Installation - We offer on-site installation in all the metro cities within 48 hours with the help of our channel partners which are spread across the country. From a single projector to complete home cinema setup, our team can service you at your doorstep. 
  4. After Sales Support - The only issue with Hi-Fi equipment is that you will not find local service centers in every city. Most of the brands have their service centers only in the metro cities and hence it becomes difficult for the customers who are living far away places to claim warranty. At AV Kart, we solve this problem by arranging pikcup and drop facility from the nearest service center with the help of our logistic partners.
  5. Telephonic Support - In the instances when you buy any product and install it yourself but facing troubles with using it? You can book a call/video call with us to understand the operations of your new equipment.