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I Need a Passive Radiator for KG4


lancesl

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  • 4 months later...

I modeled these in BassBox and they look like they should work fine.

Forte' and Kg4

http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=295-192

Forte' II and Chorus II

http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=295-194

To work properly in the Forte' II you will want to add about 100g worth of washers.

The way these passive radiators are made they are very easy to fine tune.

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Just curious, djk, how did you model them in BassBox? Wouldn't you need the T/S specs on the K-8-K (or K-3-K) KG4 woofer and the K-25-K Forte woofer? Actualy come to think of it you wouldn't, but you would need to know the frequency the original PRs are tuned to. Also, to really compare them you would need the specs on Klipsch's KD-12 and KD-15 PRs? Do you really have all that info? If so, where did you find it?

That being said, those do look like quality PRs (unlike many I've seen before), but if anyone wants some original Klipsch KD-12 PRs for their KG4s then I am willing to sell mine for less than those Dayton's.

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I made the numbers up out of thin air!

All that is needed is the box size and the frequency response, work backwards from there.

The PE are very nice, if a bit pricey.

I make my own, but I have the experience and the test equipment to do so.

Its really not that hard.

Here is a mind blower:

Audax HT300Z2 + 15" PE passive (add 200gms) + Heresy + EV Interface A eq = 32hz at 98dB/W

The Audax has 4X the x-max that the K22 does. It is also 2dB more efficent. Make a new back panel and mount the passive on it. Add a 50µF cap in parallel with the woofer (with a type E network).

I can usually find the EV eq on eBay for ~$20

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