B2 Audio RIOT-2.5 Mini Woofer 3D-Printed Box, Amp & Enclosure DIY Project

• POWERFUL MINI WOOFER PERFORMANCE: The 2.5" B2 Audio RIOT-2.5 loudspeaker delivers 20W RMS / 40W Max with clean mid-bass and crisp highs, featuring a durable aluminum basket and paper cone for pro-grade sound in a small format.
• BLUETOOTH 5.0 + AUX CONNECTIVITY: Stream wirelessly or connect directly—this 100W+100W 2-channel Class-D amplifier features Bluetooth 5.0 and AUX inputs with treble/bass controls for precise audio tuning.
• Tinkerers: Perfect for tech tinkerers and builders exploring high-performance mini audio systems. Experiment with Bluetooth amps, subwoofers, and 3D-printed enclosures to create custom sound solutions that push the limits of compact design.
• DIY Enthusiasts: Ideal for DIY audio enthusiasts who love hands-on projects. Build your own Bluetooth speaker or mini subwoofer setup and experience the thrill of real-world sound design with B2 Audio’s precision-engineered components.
• Educators: A great choice for educators and STEM programs teaching real-world sound engineering. Engage students with a practical Bluetooth amplifier and subwoofer system that combines 3D printing, electronics, and acoustics for immersive learning.

B2 Audio RIOT-2.5 Mini Woofer 3D-Printed Box, Amp & Enclosure DIY Project

This Listing Includes:

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


• (1) Single Ported 3D-Printed Subwoofer Enclosure for B2 Audio RIOT-2.5


• (1) Daakro ZK-1002T Amplifier: 100W+100W 2.0 Channel Bluetooth 5.0 + AUX Input, Treble/Bass Control, DC 12–24V


• (1) Custom 3D-Printed B2 Audio Amp Box for ZK-1002T Amplifier

Build your own compact high-fidelity sound system with the B2 Audio RIOT-2.5 Mini Woofer DIY Project Kit.

This all-in-one package combines the raw clarity of B2 Audio engineering with a versatile Bluetooth amplifier and a 3D-printed ported enclosure—ready for your next creative build.

Whether you're assembling a desktop mini sub, a micro home speaker, or a custom RC project, this kit delivers big sound in a small footprint. The RIOT-2.5’s aluminum basket and paper cone design produce detailed mids and punchy bass, while the ZK-1002T amplifier powers it with efficiency and precision.

Mini Woofer + Enclosure Features

Experience powerful, high-clarity audio in the smallest footprint with this premium mini subwoofer package. The single 2.5" B2 Audio RIOT-2.5 woofer paired perfectly with the precision 3D-printed single ported enclosure, delivering tight, clean bass and crisp midrange performance. Ideal for desktop systems, micro home builds, RC projects, or creative custom installs where sound quality matters.

The B2 Audio RIOT-2.5 mini woofer features a black powder-coated aluminum basket, paper cone, and 4-layer aluminum voice coil for articulate response and durability. With 20W RMS and 40W Max power handling, this compact driver produces rich, detailed sound with impressive punch. The included single-ported 3D-printed enclosure optimizes airflow and cooling while keeping the build lightweight, stylish, and efficient.

Specifications:

Woofer

• Woofer Size: 2.5"


• Power Handling: 20W RMS / 40W Max


• Impedance: 4©


• Voice Coil: 0.8" 4-layer aluminum


• Basket: Aluminum, black powder-coated


• Sensitivity: 76.4 dB


• Resonant Frequency (Fs): 121.6 Hz


• Mounting Depth: 53 mm


• Weight: 0.73 lb woofer, approx. 1.13 lb with enclosure

Woofer Enclosure

• Type: Single Ported, 3D-Printed Composite


• Dimensions: 4.25" x 3.75" x 3.25"


• Optimized for: B2 Audio RIOT-2.5


• Design Benefits: Lightweight structure, efficient airflow, improved bass response, and modern appearance

Amplifier

• Power Amplifier Chip: TPA3116D2


• Input Voltage: DC 12V-24V


• Maximum Power Output: 100W+100W


• Channel Type: 2.0 Channel


• Input Methods: Bluetooth 5.0 & AUX


• Output Impedance: 4-8 ohms


• THD (Total Harmonic Distortion): 0.40%


• SNR (Signal-to-Noise Ratio): 75dB


• Compatible Speakers: Passive speakers, 20-200W, 4-8-Ohm


• Bluetooth Range: Up to 15m

Amplifier Enclosure:

• 4.08" x 3.2" x 1.30"