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Re: 4pi build with stands finally realized [message #94426 is a reply to message #94425] Tue, 14 September 2021 06:03 Go to previous messageGo to next message
Roger S. is currently offline  Roger S.
Messages: 10
Registered: September 2021
Location: Norway
Chancellor
Final results.
/forum/index.php?t=getfile&id=2840&private=0
Woofers installed. I have one question regarding the woofers. These are 2226H which I bought used, and I believe they are original and imported from USA. But the cone and dustcap has a brown colour, and all the others I see on pictures are grey/charcoal. So are they reconed with non o.e.m. cones, or is it an early production? I hope some of you guys can chime in on this.
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Happy with the speakon solution on the bottom. Makes the rear a ot cleaner.
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Had to make some grilles too. Wanted a more factory finish, and I thought my wife would find them less intrusive too. This is our main living room so I wanted them to look as nice as possible. The grille is made as small as possible. The frame is not going inside the woofer gasket and allows for 8mm excursion before it touches the fabric. They are now hanging on the woofer gasket, but I have ordered small neodym magnets. These will be glued to the gille frame and sticks to the bolt heads for the woofer.
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Re: 4pi build with stands finally realized [message #94427 is a reply to message #94426] Tue, 14 September 2021 07:04 Go to previous messageGo to next message
Roger S. is currently offline  Roger S.
Messages: 10
Registered: September 2021
Location: Norway
Chancellor
Will try to do a sondcheck today, but work is calling, and i will be away 14 days. You see the rest of my system in the background. The 4pi's will be matched to the 21" subwoofers in the corner. They are Presicion Devices PD2150 tuned to 18Hz, driven by a bridged Crown K2. I have used this setup for years now, and its a really fun combo. They are not flanking subs as they are positioned now, but I am going to try that when I come home. I have another K2 used for midbass duty on my former fully active setup, and a Crown Ct-4150. The plan is to run the woofer with the K2, and tweeter with 2 channels from the Ct-4150 as this has 10db better S/N ratio and it sounds really smooth. Proper gain matching between the amps will of course be done.
I have a minidsp Studio as preamp with Dirac. This is connected to minidsp 10x10HD, which will be used as dac for a while. Listening impressions and measurements will be posted when i find the time. The build started three weeks ago, and a lot of hours are spent. I am really looking forward to hear them, but from what I see from the measurements, rewievs and thorough documentation from Wayne, I am pretty confident they sound nice. Small adjustments in tonal balance can easily be done with dsp. Properly integrated drivers and good power response like in the 4pi is what I look for in a speaker. Poor engineering can not be fixed by dsp/room correction as some tend to believe. Tonal balance is easy.
Many thanks to Wayne and other builders for design and inspiration, and I hope this build will inspire others too.
I will be back with more when I have done some testing:)
Re: 4pi build with stands finally realized [message #94428 is a reply to message #94427] Tue, 14 September 2021 09:18 Go to previous messageGo to next message
Rusty is currently offline  Rusty
Messages: 606
Registered: May 2018
Location: Kansas City Missouri
Illuminati (1st Degree)
Whew!! Stunning craftsmanship. Your work reminds me of Troels Gravesen, the Danish speaker builder. When you get all that dialed in, you'll have a system that would cost many multiples of what you put into your excellent DIY work. And sound even better.
Re: 4pi build with stands finally realized [message #94429 is a reply to message #94428] Tue, 14 September 2021 10:55 Go to previous messageGo to next message
Roger S. is currently offline  Roger S.
Messages: 10
Registered: September 2021
Location: Norway
Chancellor
Thanks for the kind words. It is really satisfying to make a plan and see it come alive. The result is just what I hoped it would be so far. D.i.y is way more rewarding than just buying and swapping out stuff.
This is my plan for "flanking" subs. I can squeeze the electronics in the middle. Looks way better, and allows me to cross the subs a bit higher too.
/forum/index.php?t=getfile&id=2848&private=0
Re: 4pi build with stands finally realized [message #94430 is a reply to message #94429] Tue, 14 September 2021 11:56 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18123
Registered: January 2001
Illuminati (33rd Degree)

Those speakers look great, and I'll bet your setup sounds great too.

As for the 2226H drivers - you said they were used and asked if they looked like they had original cones - it's really impossible to say. They are dark grey when new, with black surrounds and black adhesive around the dust cap. But depending on how much sunlight exposure they've had, I've seen 'em get nearly white and sometimes sort of brown. They usually just get lighter and lighter grey.

The thing is, I've also seen non-OEM cones that looked nearly original. Some are decent and some are terrible. You just can't know without measuring them. The good news is that even if the cone isn't original, you can always have them re-done with OEM parts and expect them to be 100% good as new.

I'm crossing my fingers for you that measurements prove them to be OEM cones. The place to watch is 500-1000Hz. An OEM cone will measure the same as what you see posted on the website.
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