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Re: 3 PI build [message #79465 is a reply to message #79411]

Sun, 16 February 2014 15:03

BFP
Messages: 48
Registered: May 2009

Baron

Got the grills done and have continued to experiment with placement. The grills are simply a frame of 1/2" MDF 2" wide on the top and sides and 3" wide on the bottom. They are simply butt joint glued together and painted flat black. The fabric and magnets/ friction discs were added and they do the job just fine.

index.php?t=getfile&id=1420&private=0

I have abandoned trying to get decent sound on the long wall. Even with the speakers moved in to 11ft. apart I still could not get a decent centre image unless I sat right in the middle. Moving a foot to the side would pull the sound to the speaker. I also had my chair against the wall which never seems to work well IME.
I put them in the corners firing up the long dimension of the room where I could sit further back. This seemed to create the stable image that they are supposed to produce. I placed my subs in the opposite corners behind the listening seat. This provides excellent deep bass and integration with the PI 3.
I got a chance to check the port tuning and it was lower than spec at 26.5 hz. I cut the ports down to just under 2" and got a tuning of 29.8hz which is right where it should be. I do wonder if I have too much insulation in the boxes. I used rock wool batts that are 3" thick and are designed for acoustic duty. At 2.5lb/cu.ft. they are slightly denser than regular fibreglass or rock wool which I believe are around 2lb.
I may have to talk to Wayne about measuring the impedance values to determine if I have too much insulation in the box.

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[Message index]

		3 PI build By: BFP on Thu, 16 January 2014 14:58
		Re: 3 PI build By: BFP on Thu, 16 January 2014 19:08
		Re: 3 PI build By: BFP on Sun, 19 January 2014 16:27
		Re: 3 PI build By: Bill Epstein on Sun, 19 January 2014 17:31
		Re: 3 PI build By: BFP on Mon, 20 January 2014 10:07
		Re: 3 PI build By: BFP on Tue, 21 January 2014 10:43
		Re: 3 PI build By: BFP on Wed, 22 January 2014 14:37
		Re: 3 PI build By: BFP on Wed, 22 January 2014 14:50
		Re: 3 PI build By: BFP on Thu, 23 January 2014 17:26
		Re: 3 PI build By: tom-m on Thu, 23 January 2014 19:20
		Re: 3 PI build By: BFP on Fri, 24 January 2014 05:15
		Re: 3 PI build By: BFP on Tue, 28 January 2014 17:08
		Re: 3 PI build By: petew on Tue, 28 January 2014 18:18
		Re: 3 PI build By: Matts on Tue, 28 January 2014 19:27
		Re: 3 PI build By: BFP on Tue, 28 January 2014 19:36
		Re: 3 PI build By: Bill Epstein on Tue, 28 January 2014 20:48
		Re: 3 PI build By: BFP on Thu, 30 January 2014 05:05
		Re: 3 PI build By: BFP on Fri, 31 January 2014 17:16
		Re: 3 PI build By: lucasmateo on Sun, 02 February 2014 12:21
		Re: 3 PI build By: BFP on Wed, 05 February 2014 10:01
		Re: 3 PI build By: BFP on Wed, 05 February 2014 10:18
		Re: 3 PI build By: BFP on Wed, 05 February 2014 10:43
		Re: 3 PI build By: BFP on Wed, 05 February 2014 11:10
		Re: 3 PI build By: HPower on Thu, 06 February 2014 10:59
		Re: 3 PI build By: BFP on Fri, 07 February 2014 05:28
		Re: 3 PI build By: HPower on Fri, 07 February 2014 07:49
		Re: 3 PI build By: BFP on Fri, 07 February 2014 08:17
		Re: 3 PI build By: BFP on Wed, 12 February 2014 05:21
		Re: 3 PI build By: BFP on Sun, 16 February 2014 15:03
		Re: 3 PI build By: Wayne Parham on Mon, 17 February 2014 16:52
		Re: 3 PI build By: BFP on Tue, 18 February 2014 10:22
		Re: 3 PI build By: Wayne Parham on Tue, 18 February 2014 16:08
		Re: 3 PI build By: BFP on Sun, 23 February 2014 16:08
		Re: 3 PI build By: BFP on Tue, 11 March 2014 14:35
		Re: 3 PI build By: Wayne Parham on Tue, 11 March 2014 15:08
		Re: 3 PI build By: Michaelzh on Wed, 12 March 2014 07:30
		Re: 3 PI build By: BFP on Wed, 12 March 2014 15:21
		Re: 3 PI build By: BFP on Wed, 12 March 2014 15:12
		Re: 3 PI build By: Michaelzh on Wed, 12 March 2014 19:14
		Re: 3 PI build By: Nick77 on Thu, 13 March 2014 06:33
		Re: 3 PI build By: BFP on Fri, 14 March 2014 10:25

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