Hi
The resistors are both wired to the mid range driver. The top 4 ohm is in series with the capacitor which is 3.3 MF and is in series with the smaller coil which is 1.0 mh. The 8 ohm resistor is is wired parallel with the MR. The resistors are there to lower the efficiency of the MR. That is because the Woofer is lower in efficiency. This will lower the volume of the MR. The coil on the left is wired to the Woofer. Crossover FR to the Tweeter should be 6000Hz and and up. The MR I am shooting for a range of about 800Hz and begin rolling off near 5000Hz. The woofer should filter above around 800 Hz on up with the inductor.
Hi
The Cabinet is inside measured 9x11x 21.5. It is open with the 2.5 inch port. Approximately2128.5 divided by 1728 comes to 1.23 CF.
My understanding is a ten inch woofer to reach is peak needs a 1.39 size box. Assuming ported. Once I have the cxr installed I will do a freq run and just listen to see where it may need more work. I know the OEM CXR was supposedly designed for a ten inch Woofer in this box, with center taps, switchable. Which made very little difference in sound. I don't have any values on the inductors in the OEM CXR but may test it if I disassemble it. No plans to at this point. Yes the box back is sealed.
I did use a simulator which really helped. A second order changes the roll off response. It's possible I mar add a cap to the tweeter especially since it is the most efficient of the three now. Yeah that 6.5 is a killer I think. Looking at your next post.
Only visible to forum members over there.
I'm not sure everyone here who might be interested in helping you would want to have to sign up and login to some other forum just to see a pic or 2, so you'll possibly get more help if you go ahead and post them here.
That's on the tweeter, @WhiteDragon has drawn the schematic upside down (from the point of view of keeping the layout intuitive at least).
@WhiteDragon , are you expecting someone to pick up on your work? Are the *.frd files for champco's drivers, are they measured, have baffle simulated, is it your crossover?
Sorry for all the questions but just interested in the position as it stands.
Sorry for all the questions but just interested in the position as it stands.
Dayton Audio provides the FRD and ZMA for the 10" woofer
The 6.5" midrange and Foster Planar Tweeter are
FRD and ZMA traced response from data sheets.
this is what is in the zipped files.
After a little time getting the responses , I tried a basic crossover design.
The mid is a challenge, but actually not too bad.
Be curious what anyone else comes up with yes.
No Baffle compensation, so these would be the files to start with.
If you wanna see a flat line, otherwise design with compensation.
The 6.5" midrange and Foster Planar Tweeter are
FRD and ZMA traced response from data sheets.
this is what is in the zipped files.
After a little time getting the responses , I tried a basic crossover design.
The mid is a challenge, but actually not too bad.
Be curious what anyone else comes up with yes.
No Baffle compensation, so these would be the files to start with.
If you wanna see a flat line, otherwise design with compensation.
Yes, I can see the picture of your crossover board. I should have said "posted" instead of "promised"!
I would still like to see a sketch of the schematic though - you went on to give a verbal description in post #41, but a picture is worth a thousand words!
According to the link you gave, your 3-way cabinets originate from Sansui. Can you post a photo of the cabinets in this forum, simply to put the project into perspective?
Good point I had not considered.
My plan is on Monday to open the left side which has not yet been molested and install the CXR I built.
I will add additional photos of it all. Thanks.
Hi
I can build a schematic and take a photo. I will work on that.
The cabinets will probably be on Monday. It's the in-law effect. My wife's sisters are here and my time is not my own.
Its supposed to snow good for a couple days Monday Tuesday. Perfect time. Thanks
I have my appreciation of this as well. It's a little beyond my experience but my goal is to get the best I can from these cabinets without breaking the bank.
I took measurements of both the Capacitors and Inductors before mounting them but did not record the results. There were expected minor differences in all of them. When i build the second board I will add the testing results. Nothing good comes easy.
Great guess. It is called a squawker. It is sealed in back with a metal shell. I was surprised to see it test in at .16MH. The surrounds are so tiny I can see no way to soften them up where it would make much of a difference. They squawked!!!