Prestige Passive Radiators

Welcome to our SEAS Prestige Passive Radiator product line.

All datasheets are downloadable as pdf files. For further information, please contact one of our world wide distributors, or send an email to

Prestige passives

All units with Polypropylene cone, 4mm screw, discs and nut for attaching additional weight

Item 18cm units SD in cm2 VAS MMS RMS
H9944 SP18R 130 sq cm 41  21.5  
Item 22cm units SD in cm2 VAS MMS RMS
H9945 SP22R 230 sq cm 138  28  
Item 26cm units SD in cm2 VAS MMS RMS
H9946  SP26R 350 sq cm 214  42  

H9944 SP18R

SP18R is a passive radiator intended for use as an alternative to the port in a bass reflex cabinet, together with an active woofer of similar size or smaller.

In many applications, the traditional bass reflex port may produce high speed air noise or even have poor effect due to a small port area or a large port length. In such cases, a passive radiator may bring about an improvement.

The chart below will show you the mass which has to be added to the cone of the passive radiator in order to obtain the desired Helmholtz resonance frequency in a given cabinet volume.

The passive radiator cone is equipped with an M4mm screw to which you can easily attach the added mass.

For optimum performance, the passive radiator should be mounted vertically (with horizontal cone axis). This is especially important when a significant additional mass is used.

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pdfDownload Datasheet SP18R
Additional weight/cabinet volume
f2_seas_prestige_passive_radiator__h9944_sp18r.jpg   d_seas_prestige_passive_radiator__h9944_sp18r.jpg


 SEAS reserves the right to change technical data

More Articles...

  1. H9945 SP22R
  2. H9946 SP26R