
Ferrite Ring Magnet OD55 x H12 x ID24 mm Y30BH | Loudspeaker Magnet
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This ferrite ring magnet is uncoated and weighs 110g with a pull force of 2.1kg. Grade Y30BH. It has an outside diameter of 55mm, inside diameter of 24mm and is 12mm thick. Its direction of magnetization is through height.
This ferrite ring magnet is a critical component in the functioning of loudspeakers. In loudspeakers, ferrite ring magnets are essential for converting electrical signals into sound. The magnet generates a stable magnetic field in the gap where the voice coil is located. The voice coil, when an audio signal passes through it, creates a varying magnetic field around itself. This interaction between the voice coil's varying magnetic field and the ferrite magnet's permanent magnetic field causes the voice coil to move. This movement drives the attached speaker cone back and forth, pushing and pulling the air to produce sound waves that match the original audio signal.
The dimensions of this magnet are precisely designed to fit within the speaker structure, delivering efficient magnetic interaction with minimal energy loss. Its pull force of 2.1kg means it can securely interact with the voice coil without dislodging, even under high-frequency vibrations. The 12mm height of the magnet and its direction of magnetisation gives optimal magnetic flux and enhances the loudspeaker's efficiency and sound quality.
The Y30BH grade of the magnet means it has a high performance and stability, essential for maintaining sound quality over time. Ferrite magnets are known for their durability and resistance to de-magnetization and corrosion, which is crucial for loudspeakers used in challenging environments.
In addition to its primary use in loudspeakers, this magnet's properties make it suitable for other applications requiring stable and strong magnetic fields. These include various types of sensors, motors and other electronic devices where consistent magnetic performance is needed.
This ferrite ring magnet is an indispensable component for loudspeakers. Its strong pull force, high-quality material and specific dimensions provides reliable and efficient magnetic performance which is crucial for high-fidelity sound reproduction.
Typical Physical Properties

NB: Ranges are indicative for product category, please check individual products for specific values within that range.
Magnetic Properties

Production Flow Diagram

Demagnetisation Curves

Returns Policy
If you are not entirely satisfied with your purchase, we're here to help.
We have a 30 Day Returns policy at Frenergy Magnets. You may return your item within 30 days of receiving it to receive a refund.
The product/s must be unused and in the same condition you received them in. Please contact us at info@frenergy.com.au to initiate the returns process.
The buyer is responsible for the cost of returning the order.