SKU: 18638476325

B2 Audio RIOT Series 8" 4-Ohm 150W RMS Mid-Range Speakers UV/Water Resistant Cone, Sold in Pairs RIOT8PWR

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Description

B2 Audio RIOT Series 8" 4-Ohm 150W RMS Mid-Range Speakers UV/Water Resistant Cone, Sold in Pairs RIOT8PWRHigh Powered Performance Each 8. 5" mid range speaker delivers 150W RMS and 300W max power for bold, distortion free sound. Built for Harsh Environments UV treated, water resistant cone and dual cloth surround provide long lasting durability for outdoor and marine use. Clear, Wide Frequency Response Covers 80Hz to 6kHz with 94. 7dB sensitivity, ensuring full bodied mids in any setup. Optimized Compact Design Lightweight 1. 7kg chassis with a dust cap

  • High-Powered Performance – Each 8.5" mid-range speaker delivers 150W RMS and 300W max power for bold, distortion-free sound.
  • Built for Harsh Environments – UV-treated, water-resistant cone and dual cloth surround provide long-lasting durability for outdoor and marine use.
  • Clear, Wide Frequency Response – Covers 80Hz to 6kHz with 94.7dB sensitivity, ensuring full-bodied mids in any setup.
  • Optimized Compact Design – Lightweight 1.7kg chassis with a dust cap for enhanced sound dispersion in space-conscious installs.
  • Perfect for All Installs – Ideal for car audio, boats, off-road vehicles, and custom builds demanding reliable and efficient mid-range output.


B2 Audio 8.5" 4-Ohm 150W RMS Mid-Range UV/Water Resistant Pair of Speakers RIOT


This Listing Includes:



  • (2) RIOT Series 8.5" 4-Ohm 150W RMS Mid-Range UV/Water Resistant Speakers


Item Description


Deliver high-performance audio with the RIOT Series 8.5" mid-range speakers. With 150W RMS power handling and 4-ohm impedance, these speakers ensure powerful, distortion-free sound. Built with UV and water-resistant materials, they are ideal for outdoor and marine use, offering durability and reliability in challenging environments. Perfect for car audio systems, boats, and more, these speakers provide clear and immersive sound for every adventure.


Features



  • WIDE FREQUENCY RANGE: Covers 80 Hz to 6 KHz for immersive sound.

  • DURABLE MATERIALS: UV-protected, weatherproof cone for lasting use.

  • POWERFUL OUTPUT: Handles 150W RMS effortlessly.

  • OPTIMIZED DESIGN: Dust cap enhances sound dispersion in compact setups.

  • ENERGY EFFICIENT: High output with minimal power draw.


Specifications



  • Nominal Chassis Diameter: 8"

  • MAX Power: 300 Watts

  • RMS Power: 150 Watts

  • Frequency Response: 80 Hz – 6 Hz

  • Sensitivity: 94.7 dB

  • Nominal Impedance: 4 Ohm

  • Resonance Frequency (Fs): 90 Hz

  • Voice Coil Diameter: 1.5"

  • Winding Material / Type: KCCAW

  • Magnet Type: Ferrite

  • Magnet Weight: 23 oz

  • Cone Material: UV-treated weatherproof paper

  • Surround Type: Dual U-shaped cloth


Thiele Small Parameters



  • FS: 90 Hz

  • RE (series): 3.8 Ohm

  • QMS: 4

  • QES: 0.94

  • QTS: 0.76

  • Cms: 108 um/N

  • VAS: 7.7 L

  • BL/RE: 15.2

  • MMS: 22 g

  • SD: 223.9 cm^2

  • Efficiency: 0.86 percent

  • EBP: 96


Mounting/Shipping Information



  • Overall Diameter: 8 in / 205 mm

  • Baffle Cutout Diameter: 7.1 in / 183 mm

  • Bolt Circle Diameter: 7.6 in / 194 mm

  • Total Depth: 3.54 in / 90 mm

  • Mounting Depth: 3.23 in / 82 mm

  • Net Weight (1pc): 1.7 kgs

  • Shipping Weight (set): 2.1 kgs

  • Shipping Box (set): 230 x 213 x 128 mm


Dimensions



  • Length: 8.5 inches

  • Width: 8.5 inches

  • Height: 4 inches

  • Weight: 3.75

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 18638476325

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Emily S
Whiting, US
★★★★★ 5
Very helpful for writing research papers!
Format: Paperback
I bought this to help with writing papers for grad school. It's now a staple on my desk! Very helpful.
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Reviewed in the United States on March 13, 2026
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Elizabeth Robbins
Louisville, US
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Arrived on time and as detailed
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Reviewed in the United States on March 18, 2026
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RoseJo
Phoenix, US
★★★★★ 4
Vast improvement in substance and organization; a few downsides
Format: Spiral-bound, Format: Spiral-bound
Among my other writing-related pursuits, I edit PhDs. This APA 7 manual is a big improvement over earlier APA editions. The primary purpose of any edition is to update the APA standards. This manual is packed with content and examples that were IMO long overdue. For instance, there are templates to show the order of data for Reference entries, and there are side-by-side examples of Reference and in-text citations. I ordered the wire-bound version because it works well in any workspace (i.e., you can easily fold the book in half or leave it wide open. The chapters are divided by tabs, with the ToC (table of contents) for that chapter printed on the tab. Compared to earlier versions, the font is smaller, but it remains highly readable. The margins are wide enough for notes. There are several downsides to the manual that I hope will be resolved in the next edition: (a) For such a large manual, the cover on the wirebound copy is both too short and relatively flimsy. It is too short because it is only the width of the pages. It does not extend over the tabs. It is too flimsy because it is the same weight as earlier and less substantial manuals. (b) There is no tab for the index. (c) Although the font in the chapters is a sufficient size, the font in the index is much smaller and the index pages are crowded; there is less room in the margins for taking notes. I dealt with the cover-related problems by cutting up a transparent binder/page sleeve for the front, back, and spine of the cover, and by creating my own tab for the index. There's nothing to be done for the index font except to live with it. You can get the gist of what I've reported here by looking at the pictures I've attached.
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Reviewed in the United States on March 13, 2023
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veronica contreras
Birmingham, US
★★★★★ 5
Delivery date was important
Format: Paperback
Needed it for school. Great book
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Reviewed in the United States on May 29, 2026
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Miku
Dallas, US
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Item came as promised in great condition!
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Reviewed in the United States on May 14, 2026

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