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Kicker 47KBRW8 ReFLEX™ 8" passive radiator — big bass without a ported enclosure

Item # 20647KBR8

Get the punch of a ported box in a small sealed enclosure that can fit in more places in your vehicle.

Get the punch of a ported box in a small sealed enclosure that can fit in more places in your vehicle.

7 questions - 8 answers

Item # 20647KBR8

Ships free today

In stock
$49.99 each

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About the Kicker 47KBRW8 ReFLEX™

Dave Delamere

Big boom for boxes with low internal volumes

Ports require larger enclosures to be effective and can sometimes produce unwanted noise. When paired with a compatible 8" subwoofer, Kicker's 47KBRW8 8" passive radiator lets you get the punch of a ported box in a small sealed enclosure that can fit in more places in your vehicle. Kicker recommends using a subwoofer with a recommended box volume of 0.4 cubic feet, such as a Kicker CompRT subwoofer.

Big boom for boxes with low internal volumes

Ports require larger enclosures to be effective and can sometimes produce unwanted noise. When paired with a compatible 8" subwoofer, Kicker's 47KBRW8 8" passive radiator lets you get the punch of a ported box in a small sealed enclosure that can fit in more places in your vehicle. Kicker recommends using a subwoofer with a recommended box volume of 0.4 cubic feet, such as a Kicker CompRT subwoofer.

Note: This passive radiator will not produce sound by itself. It must be paired with a subwoofer in an enclosure.

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Product highlights:

  • 8" ReFLEX™ passive radiator
  • works in a dual 8" enclosure
    • works with a 8" sub in 0.4 cubic feet air space
    • tuned to 49 Hz
  • grille not included
  • warranty: 1 year
  • MFR # 47KBRW8

What's in the box:

  • One 8" Passive Radiator
  • 4 Adhesive backed screw covers
  • Quick-Start Guide (English/ Spanish/ German/ French)
  • Template on box

Customer reviews for Kicker 47KBRW8 ReFLEX™

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Features

Overview: This passive radiator is designed to pair with an 8" Kicker CompR or CompRT subwoofer in a 0.4 ft³ enclosure.

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Customer Q&A

7 questions already asked

Q
Will this fit in place of the stock 8 in Bose subwoofer on a 2007 Pathfinder?
josh  Dec 06, 2023
1 answer
A
Unfortunately, this isn't a subwoofer. It is a passive radiator that would be used in a custom-built enclosure alongside a matching subwoofer. For help with selecting speakers for your projects, please reach out to our advisors via online chat or phone at 1-800-324-9695.
zachary  Dec 06, 2023 (Staff)
Q
Can I use this to replace a blown sub in a kicker hideaway?
chris  Mar 26, 2023
1 answer
A
This is not a subwoofer. It does not have a magnet, voicecoil, wire terminals, etc. It cannot be used to replace a subwoofer.
zachary  Mar 26, 2023 (Staff)
Q
Would these fit in 02 yukon factory box?
ken conerly  Sep 11, 2022
1 answer
A
This is not a subwoofer. It is a passive radiator for use in boxes that also include a subwoofer. Please call our advisors at 1-800-324-9695 for help with selecting subwoofers for your project.
zachary  Sep 12, 2022 (Staff)
Q
Can you use the kicker passive radiator with any 8" sub?
mark  May 30, 2021
1 answer
A
It must be used with an 8" subwoofer and is designed for the 8" Kicker CompR or CompRT subwoofers
jason  Jun 15, 2021 (Staff)
Q
Does it. One with a box or is it just the woofer ?
erik  Jan 31, 2021
3 answers
A
This is NOT a SubWoofer. It is a reinforced plastic shield to add an echo to an already existing 8" speaker. No wires, no magnets.
kenneth  Jan 31, 2021
A
This is a passive resonator. If you have a dual speaker box you would need 1 sub and install this in the other opening.
jeremy  Jan 31, 2021
A
It's like, just the cover for a woofer
liam  Jan 31, 2021
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