Magnetic shielding

90mm ferrite ring, magnetised, SPM-90

Enlarge Magnetic ring of high-quality ferrite, for the partly compensation of magnetic fields of speakers, also suitable for changing the drive parameters (Qes and with that Qts!). The strength of the respective changes cannot be predicted for certain for the different speakers and has to be established by experiment, depending on the type.

Price per unit   (Order No mo-104260) - not available
 


Magnetic shielding for drivers

In case you want to place a loudspeaker close to a CRT, magnetically shielded drivers are mandatory. Reducing the impact of the magnetic field at a later stage is possible by employing compensation magnet or shielding caps.

Compensation magnets

The following compensation magnets should be attached to the rear of the driver causing the two magnets to draw apart (as long as they don't touch).

Type Diameter Inside Height Price
KOMA 84 84 mm 42 mm 15 mm   EUR 11,40 excl. VAT: € 9.58 / $ 10.83
KOMA 121 121 mm 57 mm 24 mm   EUR 20,95 excl. VAT: € 17.61 / $ 19.89
Shielding caps made of steel

The shielding cap is simply put over the driver's magnet.

Type Diameter Inside Height Price
CAP 87 - 87 mm 36 mm   EUR 8,90 excl. VAT: € 7.48 / $ 8.45