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Old 22nd March 2011, 12:18 AM   #11
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Default Restore speaker cabinets

The budget for the speakers is about six hundred dollars or so. I would try refoaming the bozaks but I all ready trashed them. They had other issues due to the severe abuse they took in the late 60's and 70's. I thought about installing a woofer and cutting in a separate mid range and tweeter but would have no idea how to wire them or what crossover to use. I am just a dumb pipefitter with some basic electrical knowledge and get lost quickly when the talk gets to technical so I need to keep it fairly simple. I tried to post some pictures of the cabinet but for some reason I do not have a pictures and albums link on my user control.
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Old 22nd March 2011, 01:49 AM   #12
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A simple solution would be to buy ready made full range speakers.

Or build your own enclosure for full range drivers.

I run a mobile disco with full range drivers and this means I dont need a crossover.
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Old 22nd March 2011, 05:50 PM   #13
Tom V is offline Tom V  United States
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To further develop my idea and to stay (almost) within Cleary's $600 budget:

2 Alpair 7's $170
https://www.madisound.com/store/prod...oducts_id=8862

2 Dayton 100w Subwoofer amps $174
Dayton Audio SA100 100W Subwoofer Amplifier

2 Dayton 12" Reference HF Subwoofers $276
http://www.parts-express.com/pe/show...number=295-464

What do the experts say? Will this play nicely in that big cabinet? It looks like the sub should be set to crossover at about 80hz, with the Alpair running full range.

-Tom-

Last edited by Tom V; 22nd March 2011 at 05:52 PM. Reason: wrong link for subs
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Old 22nd March 2011, 09:15 PM   #14
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Tom-
I'm not an expert (at all!) but will throw out a couple of ideas:
The Vas on the Alpairs is 3.5L (?). Are you suggesting just installing them in the OP's enclosures (11+ cu ft) ? Or 'partitioning off' part of the box?

Don't subwoofers have to play in their own enclosures? When I built my Fonkens with woofers (for a biamp setup), Dave (Planet10) suggested a design with a separate 'box' for the woofs... all combined into the floorstander.

The reason I suggested the ANs was mostly because they are cheap (contact me!) and they require a large enclosure - if the specs can be believed at all.
John
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Old 22nd March 2011, 09:34 PM   #15
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The Alpair 7 would need its own subenclosure. 5-7 litres sealed would do. A killer midtweeter, i'm going to use eN versions in my next monster project,

For woofer something with a low Fs and a Qt of 0.5 to 0.6 since most any modern 12" is going to consider that box to be an infinite baffle. Best to biamp. I;d at least put a 1st order PPLLXO on the HF amp.

dave
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Old 22nd March 2011, 10:46 PM   #16
Tom V is offline Tom V  United States
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Ok a subenclosure for the Alpair. It might be as easy as walling off one corner of the box if you can get enough room to work thru the existing 12" hole.

The Dayton 12" has a Qts of .49 and Fs of 25. Close enough?

>1st order PPLLXO
Whazzat?? The Dayton amp does have a variable crossover. Would a capacitor also be needed on the Alpair to filter out the low frequencies?

(I'm designing other people's speaker projects so I don't have to go down to a wet shop and cut wood on my own!!)

-Tom-
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Old 22nd March 2011, 11:07 PM   #17
AEIOU is offline AEIOU  United States
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Once you've taken pictures with your digital camera, you need to transfer the images from the camera to your computer. Once the images (.jpg) are on your computer, you need to know where to find them, where you stored them on the computer.
When posting a thread or reply on this forum you have to scroll down below and use the "Manage Attachments" button then you select the file image with the "Choose File" button and then you use the "Upload" button.

You need to keep it simple, no sense in chopping up a nice set of furniture grade enclosures. Go and find yourself the biggest baddest 12 inch full rangers you can find and get on with it.

Quote:
Originally Posted by cleary207 View Post
The budget for the speakers is about six hundred dollars or so. I would try refoaming the bozaks but I all ready trashed them. They had other issues due to the severe abuse they took in the late 60's and 70's. I thought about installing a woofer and cutting in a separate mid range and tweeter but would have no idea how to wire them or what crossover to use. I am just a dumb pipefitter with some basic electrical knowledge and get lost quickly when the talk gets to technical so I need to keep it fairly simple. I tried to post some pictures of the cabinet but for some reason I do not have a pictures and albums link on my user control.
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Old 23rd March 2011, 12:57 AM   #18
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Default Cabinet Pictures

Here is a picture of one of the cabinets. That is a 4 foot level on left. The actual space available to install the speakers is 16" x 26" and the opening for the 12" speaker is centered in that opening.
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File Type: jpg speakers 003.jpg (147.2 KB, 33 views)
File Type: jpg speakers 004.jpg (138.9 KB, 33 views)
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Old 23rd March 2011, 01:21 AM   #19
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Quote:
Originally Posted by Tom V View Post
The Dayton 12" has a Qts of .49 and Fs of 25. Close enough?
Probably

Quote:
>1st order PPLLXO
Whazzat??
TLS.org | Passive Line-Level Crossover

dave
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