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Multi-Way Conventional loudspeakers with crossovers

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Old 17th September 2007, 12:08 AM   #11
lovitz is offline lovitz  Canada
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What are your plans for Crossovers and amplification?
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Old 27th February 2008, 03:59 PM   #12
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hello,i was trying to find out how the results of this project went,since i am working on a simular one......also i would like to get in contact with Bjorno,if i may.

thanks John
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Old 27th February 2008, 07:44 PM   #13
bjorno is offline bjorno  Sweden
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Quote:
...since i am working on a simular one......also i would like to get in contact with Bjorno,if i may.
Hi John,

Tell us about your current project!

b
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Old 27th February 2008, 11:34 PM   #14
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hi b,thanks for your response,i have a Volt 3143,atc 75/150 non s ,and SS 9700..
cab. is 36 7/8"h,25 7/8"d,15"w.....the front line wall is 9" at the bottom and 8" at top and 21 1/2"h(inside dimension)all 1"mdf.
the rear line wall is 7 1/2"from back and bottom and is straight .
the top exit line is 5"at vent(although the vent was cut 4x12") and the rear vent is 6" and 17 1/2 long..........all inside dimensions. confusing i'm sure but i cant put my pics on only e-mail them,the post won't allow it......i would appreciate any help...my prototype sounds not bad so far but my bottom seems wobbly.
thanks john
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Old 28th February 2008, 02:16 PM   #15
bjorno is offline bjorno  Sweden
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John,

Your description didnít add up when I tried to make a drawing. You could instead give an instruction, a list of all the cross section areas (CSA: s) and section lengths starting from the closed side of the TL all the way to the open end and point out where the driver is located.

Use MJK: s example as a template: See picture 1(1)

b

1(1)
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File Type: gif tl sections.gif (12.3 KB, 809 views)
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Old 28th February 2008, 04:22 PM   #16
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hi b,yes i see now what u mean,it is a 3 chamber with the exit out top front like the PMC MB2, so the 1rst csa is:
9" then behind woofer is 4"(although when i add another 1"front piece for a 2" front will change it to 4 1/2").driver locat is 8 1/2"
next csa is 8" then our first turn 11 1/4, 8, 10 1/4,7 1/2
bottom middle inside turn 6 3/4, 9 1/4, 6 3/4 , 9 1/4, 6 1/2
top turn,6 1/2, 8 7/8 ,6 1/4 and exit is 5"
line lenths are(from closed to open)
24", 8 1/2", 24", 7 1/2", 28", 21 1/2"

csa-9,DL-8 1/2,8,11 1/4,8,10 1/4,7 1/2,6 3/4,9 1/4,6 1/2,6 1/2,
8 7/8,6 1/4,5

i hope this will help B,my anniversary today so gotta go ,thank you very much,
John
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Old 29th February 2008, 02:34 PM   #17
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hi B,i was shopping with my wife yesterday and bought some memory foam at 3" thick,it is about the perfect thickness for behind woofer. Have you ever tried this product?$$$$$
i am currently using some grey(like roadcase material) 1.5" eggcrate material i purchased from Solen,but was always curious about memory foam..
i just hooked up a Bryston 10b LR x-over at 380 and 3800hz.. the bass is much tighter than the Ashley XR-2001,although the mid is way to high,maybe 2-way,3-way switch is stuck,i will work on this more...
look foreward to hearing back
John
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Old 29th February 2008, 11:38 PM   #18
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Quote:
Originally posted by mclsound
hi B,i was shopping with my wife yesterday and bought some memory foam at 3" thick,it is about the perfect thickness for behind woofer. Have you ever tried this product?$$$$$
i am currently using some grey(like roadcase material) 1.5" eggcrate material i purchased from Solen,but was always curious about memory foam..
i just hooked up a Bryston 10b LR x-over at 380 and 3800hz.. the bass is much tighter than the Ashley XR-2001,although the mid is way to high,maybe 2-way,3-way switch is stuck,i will work on this more...
look foreward to hearing back
John
Memory foam is mostly a closed-cell foam, which means that while it absorbs physical impact, it wil be a poor sound absorber overall. You will, at the least, alter the effective enclosure volume.

-- Mark
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Old 1st March 2008, 12:40 AM   #19
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thank you Mark,
it will be put behind the woofer only for tuning,not throughout ...
have you tried this product??
john
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Old 4th March 2008, 07:45 AM   #20
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hi B, i was wondering if the numbers i gave made more sense,look forward to your response.
john
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