Building new speakers, FOCAL or SCANSPEAK ?

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#21
5th element said:
Ive just looked at both tweeters and both have pretty much similar output at 30 and 60 degrees. Have you actually measured your 95? I have heard of ppl having problems with theirs in the past, but this is rare.
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I compared my 95 with my fostex FT48D. and while the sound quality of the 95 was noticeably better... the off-axis response was lousy.

Nothing is in a cabinet yet, so I just have a wire from my test amp running through a xo directly to the tweeter. With the drivers pointing at the ceiling - and myself sittng around 4 feet away, the fostex sounded much louder. It wasnt until I stood over the SS that the volume levels equaled out.
 
#22
So its probably gonna be the 18w/8546 combined with the 9700

Now I have to decide two more things.

1) Two midbasses ( MMT ) or just one ?

2) Which shielded midbass driver for the center channel will be a closer match to the 8546, the Vifa MG14 wich is shielded with kevlar cone but a vifa, or one of the

15S/8530K01 (sliced paper cone, kapton coil, SD1 motor)

18S/8535 ( carbon filled paper cone, SD1 motor )

18S/8531G-00 (sliced paper cone, SD1 motor)

I don't know if its worthed to spend that money for a center channel, and if its worthed to have 18cm midbasses instead of 15cm for dialogs. Is it critical for home theater the center channel to be a perfect match to the left and right ?



For center tweeter there are two options, the self-shielded ( ? ) D2904/6000 and the semi-shielded (??) S2905/9700 What do you think ?

Thanks once more for all the help.
 
#23
Greg B said:
Navin- I was able to get the lispiness out of my morel MDT37's by either using an LCR trap or a steep crossover.
GB
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Thanks for the help. however some time ago an amp of mine went DC and fried the tweeters. since mine were the old variety (without the replaceale voice coil) I could not replace he voice coils without sending the whole tweeter back to morel. this was quite impossible given india's import laws and also the freight. Hence I use 9900s now. Thanks anyway.
 
#24
jomor said:
1) Two midbasses ( MMT ) or just one ?
I don't know if its worthed to spend that money for a center channel
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center channels have to well done or not done at all. i had a hard time getting the balance of my center right (v/s the rear) so i now have them way low only to localise the dialog. I am quite sure i could do without them. BTW this migh have to do specifically with my setup but i guess you get the point.

in audio (like most things) the weakest link in the chain determines the quality of the product/service. if you have great front channels and poor center or rear the rear/center will spoil everything for you. it is best to be equitable with all 5 channels.

to quote dave (planet 10) i'd go for 2 x M and 1 x T. the M's would be in push-push. drop the center altogether if time and budet permits you can always add that later. and use a MT for the rear. this would require 4 x T and 6 x M for now.
 
#30
jomor said:
This crossed my mind to tell you the truth.. but "bucketing" the magnets, isnt it changing the magnetic field around the voice coil ?
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I've thought about that from time to time. Common sense sez, probably. However, since most of he magnetic field is contained within metal, I doubt there would be much change in using a bucking magnet. I guess you could measure with and without to see what happens.

If anyone could answer that it would be Adire Audio, they seem to have a good grip on magnetics and they actually answer questions too.
 
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