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DaveyT's Mid Top

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mykey View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 5:27pm
i have tried in the past
B&C
PDFane
RCF
and that little beauty Paudio 12nb is the nats
 
have peole had bad experience with them then?
 
great sound, cheap, and super light weight
 
HBL and Adambomb and gang heard them in the porno horn and loved it
 
HBL said it kept going up and up
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mykey View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 5:32pm
Originally posted by levyte357 levyte357 wrote:

Originally posted by mykey mykey wrote:

yes coming and looking good
not sure about your choice of old almost extinct drivers though


Is it absolutely critical for phase bung to be in contact with cone?

it has to follow the shape/contour of the cone and dust cap, it doesn't touch
 
can you see the problem of having different shaped cones and big ior smaller dust caps
 
although I was shocked that ppeople said the Bokes sounded okShockedShocked
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 6:05pm
I use SN12MB in some designs

I feed them with 950W per pair, and they love itWink
general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research

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tomschute View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tomschute Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 6:11pm
looks like you've just shown what's on the tips of a few peoples tongues - including mine!
Out to lunch... stableaudio@hotmail.co.uk
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davey t View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 9:02pm
thanks for the comments

as i said, i'm not trying to make a really really loud concert cab here, just something thats compact, fairly cheap, buildable and sounds good. I chose the 6" because its easier to get it to go high without a fiberglass phase bung - perhaps it wont be loud enough and i'l have to try an 8". Its a 12" because a 15" wont fit in this trap config and will struggle more to play high enough. I'l post the hornresp plots and you can take a look.

i gues I wont know how it sounds though until i get buildin

Mykey, have you had a look at the RCF 8" mid range neo sealed back driver? If i was going to make a fiberglass mid range horn i would use that driver! pricey though- which is why i haven't used it here.
Minirig portable soundsystem movement
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davey t View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 9:05pm
Originally posted by mykey mykey wrote:

yes coming and looking good
not sure about your choice of old almost extinct drivers though


extinct drivers? were you referring to me or someone else?
Minirig portable soundsystem movement
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doober View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote doober Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 9:47pm
Good work!

Have you done much work on the 6" section yet? Just wondering why you chose a conical horn? It'll be much easier to construct, but does it not lose a lot of low end?

I looked at that eminence driver a while ago, but it seems difficult to get hold of in the UK, like all the other suitable 6" drivers. What sort of compression ratio are you looking at?


Kieran
Blahblahblah
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 10:03pm
Originally posted by davey t davey t wrote:

Originally posted by mykey mykey wrote:

yes coming and looking good
not sure about your choice of old almost extinct drivers though


extinct drivers? were you referring to me or someone else?


SN-12MB  (200W version) is discontinued now

there is a new version , please check P-audio's site www.paudiothailand.com
general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research

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davey t View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 11:29pm
Oh yea, i knew that, i've just got 2 at home already so may aswell try with those. The low mid section should work with many different drivers. I've modeled some of the eminence neos and rcfs etc. 
Minirig portable soundsystem movement
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Timebomb View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Timebomb Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2009 at 12:25am
Looking good davey, reminds me of the FK1 RES2 a lot. 

What is the divider in the mid horn for, is it to reduce the wavelength of throat reflections?  Or is it just to hold the phaze plug?    Rogs has a similar centre divider in his stasys horns, ive always wonderd what its purpose was.


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minaximal View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote minaximal Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2009 at 12:52am
looks nice,

the closed back alpha 8mr i think? may keep up a bit better, if you needed more power.

rounding over the edges of your conical horn for mouth/ baffle correction will help reduce high order modes, if going conical it could be worth trying out an oblate spheroid, or make your own to achieve smoother off axis directivity..

i too am making my mid tops atm, but its kinda too late for me to try out le cleach or spheroid flares i been reading up about, but may be of interest to you though.


Subs + Barges = :)

www.metaacoustics.com

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darkmatter View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote darkmatter Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2009 at 12:59am
Originally posted by Timebomb Timebomb wrote:

Looking good davey, reminds me of the FK1 RES2 a lot. 

What is the divider in the mid horn for, is it to reduce the wavelength of throat reflections?  Or is it just to hold the phaze plug?    Rogs has a similar centre divider in his stasys horns, ive always wonderd what its purpose was.




I believe it's to reduce high frequency beaming.

Looking good davey!
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