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Hi Wayne, A couple of years ago I stumbled on your designs and you kindly sent me the plans for the 7pi corner horn when I suggested my lounge might be ok as a suitable location. I am in the UK so it has been necessary (cost wise) to collect parts locally rather than source them through you. I was happily collecting components for the 7pi when life got more than a bit busy and I have just come back to the idea of getting these built a few years later. Already purchased are the JBL 2226 woofers, the Eminence Delta 10 mids, the H290 horns and there I stopped. I was a bit more clued up when I first started on my shopping list but not now. Please can you confirm that all drivers for the 7pi should be the 8 ohm version. My local supplier has four different types of the 8ohm B&C de250 drivers in limited numbers and I wondered if you could provide some guidance before I contact them. I think one is push fit, another spade terminal and a couple have 'tn' in the description. What would you normally suggest or supply ? I was reading some of the more recent posts for information and looking at your replies to the "7pi plan and guidance request" post when I realised there were bigger 7pi woofers in the past and you were suggesting using his JBL 2242 drivers in 7pi-18 cabs or if no suitable corner location, a conventional box (attractive, 4pi-18 ?) as multisubs. I have two 18" Fane Colossus XB and one Colossus B which I think are not too dissimilar to the JBL as both are 99 db sensitive and designed for similar size ported cabinets. The XB specs are available on the web. I could fit in one corner sub and one or two conventional subs using the above. I hope you might supply plans if you agree that there is enough similarity. Thanks Jeff
You are correct that all drivers are 8Ω variants. The DE250-8 is the one we use, which has a polyimide diaphragm. The DE250TN uses a titanium diaphragm, and has very different properties. It's a great driver, but needs crossover changes to use. If you do purchase it, make the crossover R1/R2 values be the same as shown for the Eminence PSD2002. As for the 2242 woofer, I'll send plans for them. So check your mail.
Thanks very much Wayne. So the polyimide version is the best one to go for. I really want to hear what these corner horns can do. Fingers crossed I am allowed the time to get them built soon.
Keep us posted with your progress!