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Multi-Way Conventional loudspeakers with crossovers

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Old 3rd October 2006, 03:04 AM   #11
spind is offline spind  Canada
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and the side, showing the slanting front panel and integrated stand:

The speakers are ported with a 1" x 9" rectangular port on the rear at the bottom of the cabinet.
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Old 3rd October 2006, 03:06 AM   #12
spind is offline spind  Canada
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Here's the front panel with the grill off: (tweeters are mirror imaged in a pair)
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Old 3rd October 2006, 03:11 AM   #13
spind is offline spind  Canada
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Cabinet walls are 1" thick, and lined with fiberglass. There are 3 'H' braces (1" material again) one above and one below the woofer, and one lower down the cabinet:
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Old 3rd October 2006, 03:14 AM   #14
spind is offline spind  Canada
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woofers:
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Old 3rd October 2006, 03:16 AM   #15
spind is offline spind  Canada
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and tweeters:

Unfortunately, there is a surprise for me as there is evidence that one of the tweeters has been replaced at one time. One is model # PL513 and the other is model # P94C2
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Old 3rd October 2006, 03:50 AM   #16
spind is offline spind  Canada
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and the crossover:

-on the lower left a red wire comes in from the speaker post (not shown): it goes through the iron core inductor and then to the red woofer wire; in parallel to the red wire branch branch point is a 47 uF bi-polar electrolytic in series with a 2 ohm 20 w resistor, which is connected to the black wire to the woofer and the black speaker post.

-for the tweeter, the positive goes through a 3.3 ohm 10 W resistor and then a 6 uF capacitor (top left); there is then a branch point with a 4.7 uF and a 6 uF capacitor in parallel (total 10.7 uF) which leads to the tweeter yellow (+) wire; from the branch point a 1 ohm 20 W resistor is in series with an air core inductor and then the black speaker terminal (blue wire goes to tweeter)
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Old 5th October 2006, 04:55 AM   #17
bigerik is offline bigerik  Canada
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Thanks for all the pics, Steve!
Any thoughts on what parts you wanna go to for the crossover? I figure if I am gonna do it, I am gonna put the best stuff in that I can find!
E
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Old 6th October 2006, 01:32 AM   #18
rtenyes is offline rtenyes  United States
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i upgraded my ref 22's last year using northcreek caps, 12g inductors and their resistors, silver wire for the tweeters and big copper pipes for the woofers (and bi-wired it). the xovers are too large to fit easily inside the cabs. i have the xover diagram that was sent to me by a very kind energy employee if any one is interested. in all honesty the sound didn't improve much. i did enjoy doing it though!
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Old 6th October 2006, 04:01 PM   #19
spind is offline spind  Canada
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rtenyes:

It would be great to see the crossover Energy supplied you for the 22's. If you have some way to upload the schematic here it would be much appreciated. Was your original crossover mounted on the back of the terminal cup? I just 'lifted' this picture form a current e*ay auction:

Steve.
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Old 6th October 2006, 06:06 PM   #20
rtenyes is offline rtenyes  United States
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steve:
my xover looks exactly the same as the first pic (as apposed to the one you just posted) except the mine has (2) 25uf caps in parallel in the woofer section as apposed to the "47"uf that's supposed to be there. it too is mounted on the 1/4 hardboard and then has epoxy on the components. as far as the schematic goes, i'll have to scan it in and figure how to upload! (is there a fac on uploading?)
ross
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