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DaveyT's Mid Top |
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davey t 
Young Croc 
Joined: 11 March 2004 Location: Bristol UK Status: Offline Points: 1428 |
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 Topic: DaveyT's Mid TopPosted: 31 March 2009 at 10:55am |
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Loving google sketchup at the moment, loads easier to use that catia and lets you play around with ideas pretty quick.
This is a mid/top i'm working on. Based on fairly standard tried and tested horn loading configs, but the idea it to be able to make the whole cab and horns from wood using cheap easily available drivers and parts. Maybe not the quality or loudness of simmilar cabs but two a side would give enough spl and coverage for a good dancefloor. But it DIY! and i Tried to make it look good too. 60x40 dispersion. 50cm width, 75cm height 40-50cm depth (still designing it!) Low mid is a 12" reverse loaded reflex horn covering 100-450hz. I'm going to proto with a P-audio SN12MB High mid is a conical horn using the Eminence 6.5" closed back lines array driver (alpha 6 cbmr) and covers 450-2500hz High is a 1" on a eminence LT250 or fane 60x40 CD horn  Ha, I get so excited designing new speaker I have to share it with you guys :) thoughts, comments, discussion... its work in progress so have a while to go yet. Lookin forward to knocking up a prototype in june Thinking of calling it the DMT :D |
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Minirig portable soundsystem movement
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mykey
Old Croc 
Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Posted: 31 March 2009 at 11:03am |
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Doing something similar dave, will be nice if they both turn up at the same tme looks very void/F1'ish I'm going 12'' 10'' 1''
very nice Dave
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mykey
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Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Posted: 31 March 2009 at 11:05am |
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just realised you are going hybrid on the 12
you ok with it going to 450? Edited by mykey - 31 March 2009 at 11:13am |
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davey t
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Joined: 11 March 2004 Location: Bristol UK Status: Offline Points: 1428 |
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Posted: 31 March 2009 at 11:29am |
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yea, horn response says so - as long as i can get the driver chamber volume ( front horn chamber) small enough (around 5L for 400hz corner). There's ripple in the response but its fairly smooth 100-400hz at 106db 1w1m 2pi +-2db. The reflex gives you the extra low end you'd never normally get from such a short horn.
Fitting that driver in with the mitred panel there and getting the volumes right is the tricky bit! |
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Minirig portable soundsystem movement
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mykey
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Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Posted: 31 March 2009 at 11:38am |
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It wasn't what HR says, it was more what the 'voice' will sound like up there
looks great, will it be a free drawing?
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Steak'n'ale
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Joined: 31 January 2008 Status: Offline Points: 165 |
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Posted: 31 March 2009 at 12:16pm |
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Sketchup skiiiiills there Dave. Does look very nice indeedy. You built one out in NZ then?
Ported horns can work for midtops - omnitop12s have quite a few fans (then again I am biased in this though). |
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Ay, Uncle Owen I'm off down't Tochie Station t'pick up some power converters
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ceharden
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Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851 |
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Posted: 31 March 2009 at 1:13pm |
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Another mid-top design, best I get on with mine, I'm lagging behind!
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levyte357
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Posted: 31 March 2009 at 2:06pm |
Thanks for sharing your ideas D, but I have a few questions, a)A 6.5" can cover 450-2k, but can it do this at high SPL, without going bang? Wouldnt 10" be better? b)A Number of subs perform best when crossed out about 80hz, Wouldn't 15" kick section in your cab be more compatible with this, and move more air? Edited by levyte357 - 31 March 2009 at 2:07pm |
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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mykey
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Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Posted: 31 March 2009 at 4:43pm |
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you almost described my new mid lev
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levyte357
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Posted: 31 March 2009 at 4:47pm |
 Dont forget, the world also needs a budget fibre glass 12" horn with base phung.  |
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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mykey
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Posted: 31 March 2009 at 5:00pm |
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yes coming and looking good
not sure about your choice of old almost extinct drivers though
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levyte357
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Posted: 31 March 2009 at 5:12pm |
Is it absolutely critical for phase bung to be in contact with cone? Even if the horn allowed use with 4x different drivers, would be better than bein restricted to 1x. Not every one wants Paudio driver, or to spend big bucks on 18sound/PD. Few of us like choice of B&C, Beyma, Fane, Celestion. |
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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davey t wrote: