AudioRoundTable.com - RDF feed
type: channel
description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: 3pi/4pi plans? Horn lens question
items: You've got mail!
items: 3pi plans
items: Re: 3pi plans

3pi/4pi plans? Horn lens question
type: item
description: I am interested in the 3pi and 4pi plans I found the audiokarma econowave project, and located your site after reading. It seems your designs are well tested and driver mated, which I value highly. First, I bought the JBL horn lenses for the econowave project...can I use those? Second, I can't afford JBL's right now, so, how big of an improvement is the Omega 15 over the Delta 12LF? It's double the volume, and double the price...double the performance? or not. Plans would be great. Any help deciding? Jake
creator: JakeB
date: 2008-10-31T07:57:18-00:00

You've got mail!
type: item
description: The H290 horn used in π speakers provides uniform directivity and smooth response. It has a radiused throat with no sharp bends anywhere. I think it's a very good horn for this application, acoustically smooth both in response and directivity. We also have a wood horn that I designed specifically for the π cornerhorns, but that can also be used on the matched-directivity two-way models. It is very attractive, so most people mount it externally sitting on a cradle on top of the speaker. Of course, the driver-to-driver spacing must be maintained when doing this, in order to keep the angular coverage right. The JBL PT-K95MH waveguide might well work with my designs, since it has a 90x50 coverage pattern and uniform directivity. However, I have not tested it, and some crossover changes might be necessary in order to set the null angles outside the pattern, as they should be. That's one of my main design goals, in addition to matching horizontal directivity at crossover, I prefer to match the vertical null angles to the vertical pattern of the HF horn. This makes the most natural sound, limiting sound radiated at large vertical angles outside the nulls. In effect, the nulls serve to punctuate the pattern.
creator: Wayne Parham
date: 2008-10-31T16:28:02-00:00

3pi plans
type: item
description: Could I please get the 3pi plans. Thanks
creator: JakeB
date: 2008-10-31T16:59:59-00:00

Re: 3pi plans
type: item
description: Check your mail - I already sent the plans. If they haven't arrived, let me know and I'll resend.
creator: Wayne Parham
date: 2008-10-31T17:18:40-00:00