Thinking about Pi 7 kit..

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#21
sippy said:
£25 and I'll ask Wayne P for you - notes only though
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I can ask Wayne - since he is always a gentleman...

However, I'm not the guy who is buying or consuming, only answering the OP's question. Wayne apparently will not attend LSAF this weekend - too bad.

I wouldn't put money down on a loudspeaker kit that doesn't post test data clearly - just my $0.02.

Wayn'e 4Pi speakers sounded open (like a Klipsch Heresy or perhaps a Cornwall) last year at LSAF, but it wasn't in a very good room or well integrated into the acoustical space (i.e., it was a hotel room)--but neither was virtually any other setup there last year. Most setups there sounded horrible to my ears.

Corner Horn Imaging FAQ - diyAudio
 
#22
I've searched around quite a bit and have only found one online system build from a gentleman in the UK.
I'm really wondering if my room is to flawed for this type of system. I could extend the side walls to five feet if I NEED to though.
I like the look of the 7 Pi and they would disappear into the corners in my darkened room.
The price doesn’t bother me at 2k fully kitted out either.
Thanks for all the replies!
Vince
 
#23
compaddict said:
I've searched around quite a bit and have only found one online system build from a gentleman in the UK.
I'm really wondering if my room is too flawed for this type of system. I could extend the side walls to five feet if I NEED to though.
I like the look of the 7 Pi and they would disappear into the corners in my darkened room.
The price doesn’t bother me at 2k fully kitted out either.
Thanks for all the replies!
Vince
Click to expand...

Your room drawing is good - no issues that I can see for side wall depth or front wall width. Pictures are better, however. Did you mention the ceiling height? This is more important for collapsing polar midrange horns - like the ones used the La Scala and Khorn. I also would recommend keeping the entire front wall clear of equipment and other acoustically reflective objects, instead putting your electronics to the side or back of the room.

The Seven Pi midrange horn mouth size looks like it might lose polar control around 500-1000 Hz or so in the vertical axis. This is the reason for the need for a higher ceiling height, the use of acoustic ceiling treatments, or extra absorbent material around the mouth of the midrange horn - like the Peavey QT horn.

You will likely need to control the early reflections from the vertical axis in the band where it loses polar control down the crossover frequency to the bass bin - both on ceiling and floor. Having the polar plots of both the midrange and the bass bin in both axes (horizontal, vertical) as well as the crossover frequencies between midrange and bass bin is pretty much a requirement to understand imaging potential.

Chris
 
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#26
Parts are ordered from Pi. 1,930.72 shipped to me.
I got the better drivers and stepped up on the caps/res.
I said goodbye to my beloved Martin Logan CLS yesterday.
I went through all three sets of spare speakers I had including two that were doing duty in the garage. The last set were some tiny JBL ported BS...
 
#27
Great, glad to see someone else decided to build these. I am in the process of collecting parts... I have wood and some omega pro 15As. You have a big head start😀. I'm sure I'm not the only one interested in a build thread😉
 
#33
I think:
"The seven crossover points are 250Hz and 1.6kHz. The lower crossover is very gradual with a lot of overlap so the midrange goes deeper than that. The woofer is rolled off slowly and is at half power at 250Hz. The upper crossover is steeper and asymmetrical. It was designed to provide perfect summing between the midhorn and tweeter."
 
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