Passive Bass Radiator Diaphragm 2/3/4 Inch – DIY Speaker

$10.00 $11.78

Upgrade Your DIY Speaker Build with a Passive Bass Radiator Diaphragm

Take your audio projects to the next level with this Passive Bass Radiator Speaker Diaphragm, available in 2-inch, 3-inch, and 4-inch sizes. Whether you're building a custom subwoofer enclosure, refreshing an existing speaker system, or crafting a home theater setup from scratch, this vibration plate is the perfect addition to your DIY toolkit.

Why Choose This Passive Radiator Diaphragm?

Powerful Low-Frequency Response: Engineered to reproduce deep, full bass tones that bring music, movies, and live audio to life.
Premium Materials: Constructed from high-quality rubber and iron sheet for excellent resonance, durability, and long-lasting performance.
Multiple Size Options: Choose from 2-inch, 3-inch, or 4-inch diameters to match your enclosure design perfectly.
Versatile Application: Ideal for home theaters, party speakers, live performance rigs, portable Bluetooth speakers, and custom DIY audio builds.
DIY-Friendly Design: Easy to install into most standard speaker enclosures — no complex tools required.
Designed for Enthusiasts & Professionals: A must-have upgrade for anyone who demands rich, immersive sound quality.

Product Specifications

Item Type: Passive Bass Radiator / Speaker Diaphragm (Vibration Plate)
Material: Rubber + Iron Sheet
Available Sizes: 2 inch / 3 inch / 4 inch
Color: Black
Country of Origin: Made in China

What's in the Box?

1x Passive Bass Radiator Speaker Diaphragm

Note: Please allow 1–2 cm tolerance due to manual measurement. Colors may vary slightly depending on your monitor's display settings.

Frequently Asked Questions

Q: What is a passive bass radiator diaphragm and how does it work?

A: A passive bass radiator (also called a passive radiator or drone cone) is a speaker diaphragm that moves in response to air pressure changes created by an active driver inside the enclosure. It enhances low-frequency output — producing deeper, richer bass — without requiring a dedicated amplifier or electrical connection of its own. It's commonly used in compact speaker enclosures where a traditional port tube isn't practical.

Q: Which size passive radiator diaphragm should I choose — 2, 3, or 4 inch?

A: The ideal size depends on your speaker enclosure dimensions and the active woofer you're pairing it with. As a general guideline: a 2-inch passive radiator suits small portable or desktop speaker builds, a 3-inch fits mid-sized enclosures, and the 4-inch works best in larger cabinets or home theater subwoofer builds that demand more low-frequency presence. Match the passive radiator size as closely as possible to your active driver size for the best acoustic results.

Q: Is this passive radiator compatible with Bluetooth speaker enclosures?

A: Yes! This passive bass radiator diaphragm is a great fit for DIY Bluetooth speaker projects. Many compact Bluetooth speaker designs use passive radiators instead of bass ports to maximize low-end output in a small form factor. Simply mount it into the appropriate cutout in your enclosure for an instant bass boost.