2-Pack Bass Passive Radiator Diaphragm 88×48mm – Speaker DIY
one size
$18.28
Sale price
$18.28
Regular price
$22.65
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2-Pack Bass Passive Radiator Diaphragm 88×48mm – Speaker DIY
$18.28
Sale price
$18.28
Regular price
$22.65
Upgrade Your Bass with Passive Radiator Diaphragms
Take your DIY audio projects to the next level with this 2-pack of rubber bass passive radiator vibration plates (Model 8848). Designed to replace traditional inverted port tubes in subwoofer enclosures, these low-frequency radiator diaphragms deliver tighter, faster bass response while completely eliminating the wind noise associated with bass-reflex (ported) designs.
Why Choose a Passive Radiator?
A passive radiator — sometimes called a drone cone — works in tandem with your active woofer driver inside a sealed or semi-sealed enclosure. Compared to conventional ported subwoofer designs, passive radiators offer:
- Equivalent low-frequency extension to a ported (bass-reflex) cabinet
- Faster, tighter bass that rivals closed-box speaker builds
- Zero port noise — no wind chuffing or turbulence at high volumes
- Compact enclosure flexibility — ideal for portable Bluetooth speakers and home audio DIY builds
Key Specifications
- Model: 8848 Low Frequency Radiator Vibration Plate
- Type: Sound film / Passive Radiator Diaphragm
- Material: Durable Rubber
- Size: 88 × 48 mm
- Net Weight: 70 g
- Package Contents: 2 × Passive Radiator Vibration Plates
- Made in China
Perfect For
- DIY subwoofer and speaker builds
- Replacing worn or damaged diaphragms in existing speaker enclosures
- Home audio systems, portable Bluetooth speakers, and car audio enclosures
- Audio hobbyists and repair technicians
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For a deeper understanding of loudspeaker design principles and acoustics, the National Institute of Standards and Technology (NIST) Acoustics resources offer authoritative technical guidance for audio engineers and hobbyists alike.
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Frequently Asked Questions
Q: What is a passive radiator diaphragm and how does it work in a speaker enclosure?
A: A passive radiator (also called a drone cone or auxiliary bass radiator) is an unpowered speaker component mounted in a cabinet alongside an active driver. When the active woofer moves air inside the enclosure, it excites the passive radiator, which moves in response and reinforces low-frequency output — much like a ported tube, but without the wind noise or turbulence drawbacks of a traditional bass-reflex port.
Q: What size enclosure is this 88×48mm passive radiator diaphragm best suited for?
A: At 88 × 48 mm, these passive radiator vibration plates are ideally suited for small to medium DIY speaker builds, including compact portable Bluetooth speaker enclosures and bookshelf subwoofer cabinets. Always match the radiator's moving mass and compliance to your active driver's Thiele-Small parameters for optimal bass tuning.
Q: Can this passive radiator diaphragm be used for speaker repair?
A: Yes. These rubber diaphragm plates are designed as speaker repair parts for existing enclosures that use passive radiators. If your current passive radiator is torn, stiff, or damaged, this 2-pack provides a direct replacement compatible with similarly sized enclosures using a standard 88 × 48 mm mounting footprint.
Q: How many passive radiators are included in this listing?
A: This listing includes 2 passive radiator vibration plates per package, giving you a spare or allowing you to equip both sides of a dual-radiator speaker enclosure in one purchase.