B2 Audio Mini Woofer 2.5" 4 Ohm Loudspeaker 20W RMS Aluminum Basket

• Compact Yet Powerful – Delivers 20W RMS and 40W max in a 2.5" frame, ideal for tight installs and custom audio projects.
• Durable Aluminum Basket – Lightweight black powder-coated basket provides structural integrity and heat resistance.
• Precision Sound – Paper cone with ROAM surround and 4-layer aluminum voice coil for crisp, responsive mids.
• Strong Magnet Structure – Dual 3oz ferrite magnets (50x26x6mm) ensure controlled motor force and reliability.
• Easy Fit & Clean Design – 53mm mounting depth, 70mm OD, giftbox packaging, and pro-level performance for DIY or custom installs.

B2 Audio RIOT 2.5 Mini Woofer 2.5" 4 Ohm Loudspeaker 20W RMS Aluminum Basket

• (1) B2 Audio RIOT 2.5 Mini Woofer 2.5" 4 Ohm Loudspeaker 20W RMS Aluminum Basket

Disclaimer: This product is not covered under any manufacturer warranty. We recommend purchasing a CPS extended warranty to protect your purchase.

The RIOT 2.5 is a compact 2.5" speaker designed for small DIY and desktop audio projects. It features a black powder-coated aluminum basket and paper cone for balanced midrange response and a clean overall presentation.

Built with a 4-layer aluminum voice coil and dual ferrite motor structure, the RIOT 2.5 is rated at 20 watts RMS and 40 watts max power handling. Its construction is designed to provide stable operation in compact enclosures without requiring large installation depth.

With a sensitivity of 76.4 dB and a resonance frequency (Fs) of 121.6 Hz, the RIOT 2.5 works well in small sealed or ported builds where space is limited. The 53mm mounting depth and compact overall diameter make it suitable for desktop speaker projects, compact custom panels, and creative hobby builds.

Whether you're building a small Bluetooth speaker, a desktop demo box, or experimenting with a custom enclosure design, the RIOT 2.5 offers a solid platform for DIY audio projects in a manageable size.

Specifications:

• 2.5" Paper Cone, 4 Ohm Impedance


• 20W RMS / 40W Max Power


• Aluminum Basket, Dual Ferrite Magnets


• 0.8" Voice Coil, 4-layer Design


• Sensitivity: 76.4 dB, Fs: 121.6 Hz


• Does NOT come with screws or mounting hardware.

Dimensions:

• Length: 2.5"


• Width:   2.5"


• Height:  2.5"


• Weight: 0.73 lb


• Mounting Depth: 2.04"


• Cutout Diameter: 2.22"

Take your DIY experience to the next level with the RIOT-2.5 mini woofer!

It’s not just an accessory it’s an audio upgrade that lives up to the B2 Audio spirit in every way.