I'm not much of a writer, so a full fledged project write-up is probably never going to happen. I also haven't come up with a name for these (hence the "TBD's") but I'd like to share the important design aspects. Here are the drawings for the enclosure and the crossover schematic. It's not stated on the enclosure drawing (oops) but the internal depth is 8.00" for an overall depth of 9.50":
Some other comments. After a few more hours of listening I dropped the first cap in the tweeter filter again. This time down to 6.8 uF. I think the tonal balance is just perfect now with lots of midrange detail and not sounding too forward.
This design has pretty good sensitivity. They get pretty loud with the volume knob on my preamp much lower than most of my previous projects. I incorporated a full 6 dB of baffle step compensation. I've been listening to them about 36" from the back wall. I'm sitting 10 feet back with them toed in towards me.
That 1.2 mH woofer inductor is 1.5 mH P-core I unwound to 1.2. I think the Dayton 1.5 mH 18 gauge steel laminate coil unwound to 1.2 would sound exactly the same.
I bought a 12 oz bag of pillow poly fill from Walmart for $3.99 and split it exactly in half, by volume by eye and put one half in each speaker. The window brace at the midpoint works perfect to keep the stuffing in place.
The drawing doesn't show them but I have 4 sided to side braces that are 1.5" wide 0.75" thick MDF strips. There are no front to back braces, execpt for the window brace, because the front and rear panels are so narrow.
If Jason doesn't mind and anyone is interested I will post the MLTL plots.
I'm not much of a writer, so a full fledged project write-up is probably never going to happen. I also haven't come up with a name for these (hence the "TBD's") but I'd like to share the important design aspects. Here are the drawings for the enclosure and the crossover schematic. It's not stated on the enclosure drawing (oops) but the internal depth is 8.00" for an overall depth of 9.50":
I kinda think the irony is there if someone would call a slim Peerless tower "The Piers", but hey, not my call.
Piers Morgan is an English journalist and television presenter currently working on the ITV Breakfast programme Good Morning Britain. Morgan began his career in Fleet Street as a writer and editor for several tabloid papers, including The Sun, News of the World, and the Daily Mirror.
Respectfully, I disagree with Wolf's/Ben's ideas on the tweeters here. In this case I think the culprit is the placement of the tweeter on the baffle, and their radiation pattern. The wider the radiation pattern of the tweeter, the more it interacts with the baffle. In this case the Wavecor dome would "see" the baffle edges and the surrounds of the woofers, all equally. In the case of the Vifa, since it suffers from relatively poor off-axis performance, it "sees" less of those conditions.
That is my two cents based on more observation than anything else, YMMV.
= Howard Stark: "This is the key to the future. I'm limited by the technology of my time, but one day you'll figure this out."
Comments
This design has pretty good sensitivity. They get pretty loud with the volume knob on my preamp much lower than most of my previous projects. I incorporated a full 6 dB of baffle step compensation. I've been listening to them about 36" from the back wall. I'm sitting 10 feet back with them toed in towards me.
That 1.2 mH woofer inductor is 1.5 mH P-core I unwound to 1.2. I think the Dayton 1.5 mH 18 gauge steel laminate coil unwound to 1.2 would sound exactly the same.
I bought a 12 oz bag of pillow poly fill from Walmart for $3.99 and split it exactly in half, by volume by eye and put one half in each speaker. The window brace at the midpoint works perfect to keep the stuffing in place.
The drawing doesn't show them but I have 4 sided to side braces that are 1.5" wide 0.75" thick MDF strips. There are no front to back braces, execpt for the window brace, because the front and rear panels are so narrow.
If Jason doesn't mind and anyone is interested I will post the MLTL plots.
If anyone has any questions please ask.
Wikipedia:
Morgens, morgans, or mari-morgans are Welsh and Breton water spirits that drown men. They may lure men to their death by their own sylphic beauty, or with glimpses of underwater gardens with buildings of gold or crystal. They are also blamed for heavy flooding that destroys crops or villages. In the story of the drowning of Ys, a city in Brittany, the king's daughter Dahut is the cause, and she becomes a sea morgen.
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