I saw a pair of promising compression drivers on eBay. That, and my poor impulse control, led to a purchase.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7315717336&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

The diaphragms alone are $760 each, so I thought it was worth a chance. They appear to be new, unused.

These drivers are not unlike the compression drivers used in the K2

http://www.jbl.com/home/k2_story/k2_tech1.asp#435BE

As far as I have been able to find out they’re quite similar except for the back cover – in the K2 its fancier and larger, allowing a lower XO point.

The magnets are really quite something – they’re quite tiny but they distorted my computer monitor from 18” away.

I have 1-1/2” throat P-Audio baby cheeks on order.

http://www.loudspeakersplus.com/product.asp?specific=jojnprg4

They’re going on top of 2225H’s in a 40Hz vented enclosure. Those are going on top of Altec 3182’s in 7+ cu ft sealed boxes (-3dB at 35 Hz).

The 2225 boxes ought to be finished tomorrow, the 3182 enclosures by Sunday (just sent my son out to fetch some MDF).

Finishing and set-up will take a while – I’m not fancy about finish since they won’t last very long before I’m on to something else – but it might be a bit before they’re hooked up and playing since those bastards who pay me insist on certain minimal attendance and travel requirements – why don’t they respect an artist at work?

I’ll let you know how it works out.

The pattern on the cheaper Paudio wont match the original JBL unit-but whol know the difference/

Post some pictures!

My problem with commiting to a DIY design is I wont be able to sell easily as the NZ market is rather tight,speaker wise.

Cheers
Mike.e

I can sympathize with your problem - you just don't have the breadth of market in NZ that I have access to here, without spending a year's pay on shipping.

One of the benefits of being an old man (and having a wonderfully understanding wife) is that I don't have to worry too much about recovering my investment. Wood and glue are just the cost of the hobby. And I am able to pretty get my money back on eBay for drivers & stuff.

So just hang on Mike - someday you'll be a married old man, too!

• Raw Boxes

• Bass boxes

18hz Fs ahh sealed=good idea

• http://www.hal-pc.org/~bwhitejr/drivers.txt