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Passive Radiators (where at buy/how to build)
Passive Radiators (where at buy/how to build)
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Old 10th November 2004, 11:18 AM   #1
Puggie is offline Puggie  United Kingdom
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Join Date: Oct 2004
Default Passive Radiators (where at buy/how to build)

I'm looking for some passive radiators for very small (4" and tweet in <2l cabinet) reflex cabinets, conventional ports end up with looooooooooooong port and resonance issues.

So where can I buy passive radiators in the UK?

Or (in the true DIY way) how do I go about making a suitable passive radiator fom a cheap driver with the magnet removed and loading the voicecoil with mass to tune it? What should I look for in a driver?

Thanks everyone.
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Old 10th November 2004, 03:22 PM   #2
Cal Weldon is offline Cal Weldon  Canada
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Join Date: Jan 2004
Location: Near Vancouver
Passive Radiators (where at buy/how to build)
Hey Puggie,

1. If you are using a 4" driver then you want at least a 5.25 inch passive.

2. Where to buy? I have no idea, I live in Canada.

3. Making yourself is trickier than you might think. You need to start with a sloppy driver. The best effect I've had is to cut little pie shaped pieces out of the spider to loosen the suspension and pouring white glue in the back of the dust cap for extra weight. I also painted the back of the pulp cone with a cut-back glue to stiffen it.

With that said, I've not seen 5.25 inch drone cone. I think they start around 8"

planet10 needs your help:
Let's help Ruth and Dave
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