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3 PI build [message #78971]

Thu, 16 January 2014 14:58

BFP
Messages: 48
Registered: May 2009

Baron

Hi folks

I've started a 3PI build. I am using the Eminence 4012HO woofer and a B&C DE250 horn driver. I have the PI H290C horns from Wayne. I am adding 4" to the overall height of the box and will house the crossover in the resulting compartment underneath. The internal dimensions are identical to the PI 3 plans developed by Wayne. I have some flared ports that are about 2 3/4" diameter that are long enough to be cut down to length for the 3.
I had some 3/4" Baltic Birch which will be used for the inner ply of a 2 layer baffle and also for the back panel. I will be using 3/4 MDF for the sides and top/bottom. Bracing will be a mix of the 2 materials as well.
I started by building the crossover board and back plate. I used 1/2 "MDF and some scraps of BB for bracing. I put a couple of thin pieces of particle board on the bottom to act as spacers for tie wraps or bolt head clearance.

index.php?t=getfile&id=1363&private=0

I am using a mix of parts. Coils are 14G Solen. Resistors are the 25w non inductive Mills heat sinked resistors. I mounted them on pieces of 1/4" Aluminium that I had in my scrap metal pile. For capacitors I had some North Creek Zen and Crescendo caps that add up to 7uf so they are doing duty as the first tweeter cap. The rest are Axon 250volt. Wire is mostly the component leads or 12 gauge OFC Anti Cable enamelled speaker cable wire. For the driver leads I had some 14g OFC wire for the woofers and 16G monster cable for the tweeters. This is mostly bits and pieces I had in stock but should get the job done. Solder was Cardas tri eutectic. Here is one under construction and also a top view of the finished unit. These will slide into the empty space at the bottom rear of the box.

index.php?t=getfile&id=1366&private=0

That's all for now. Next instalment will be starting to work on the box itself.

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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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