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Hugo Biermann View Drop Down
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Joined: 05 February 2005
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Points: 809 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hugo Biermann Quote  Post ReplyReply Direct Link To This Post Topic: Mini Mini?
    Posted: 28 December 2008 at 12:51am
After looking at youmy mans fighting and swearing about mini scoops for the past 2 years I finally got to playing around inside the given dimensions. Also took a gander at some of the photos Tek's got up here... I Probably f**ked up somewhere too Sleepy

Well... Aint anything special. 4 will go down to 38Hz with C18-650EL in HRESP.
Parameters:
S1 = 784.8
S2 = 1705.85
EXP = 145
Vtc = 70000
Atc = 2905

Single Plot:
http://img184.imageshack.us/img184/1631/stubbieplotrg9.jpg

Plan:

http://img201.imageshack.us/img201/2776/hugostubbiescoopke0.jpg
www.aggressiveaudio.co.za
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Hugo Biermann View Drop Down
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Points: 809 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hugo Biermann Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 10:52am
Slightly modified. throats a bit bigger..

S1 = 828.4
http://img510.imageshack.us/img510/3248/hugostubbiescoopv2mn2.jpg

Usable between 35Hz and 80Hz......
High pass 4 @ 30Hz
www.aggressiveaudio.co.za
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levyte357 View Drop Down
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Joined: 10 May 2004
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Points: 11743 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357 Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 12:39pm
Originally posted by Three-Bee Three-Bee wrote:

After looking at youmy mans fighting and swearing about mini scoops for the past 2 years I finally got to playing around inside the given dimensions. Also took a gander at some of the photos Tek's got up here... I Probably f**ked up somewhere too Sleepy

Well... Aint anything special. 4 will go down to 38Hz with C18-650EL in HRESP.
Parameters:
S1 = 784.8
S2 = 1705.85
EXP = 145
Vtc = 70000
Atc = 2905

Single Plot:
http://img184.imageshack.us/img184/1631/stubbieplotrg9.jpg



TB thanks yet again for your contribution.

But that driver seems to be yielding reflex cab SPL. Confused
"Who am I? I'm the guy who does his job.. You must be the other guy".
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boycey View Drop Down
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Points: 1612 		Post Options Post Options   Thanks (0) Thanks(0)   Quote boycey Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 1:13pm
even though i am a total noob at this and the whole scoop thing isn't really me... isn't the poor sensitivity down to the bits with zero expansion or the negative expansion towards the end of the "scoop" bit?
the only thing more dangerous than a person who doesn't give a f**k is a person who gives a sh*t.
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mobiele eenheid View Drop Down
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Points: 1568 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 1:28pm
The low sensitivty simulated comes from the path length difference of 145 cm (not so wild guess). The actual path length difference is zero and should yield much better results both in SPL and flatness.
 
@Three-Bee: Tussen haakjes, moet er geen "w" achter jou?
 
Best regards Johan


Edited by mobiele eenheid - 28 December 2008 at 1:40pm
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CHAMPION View Drop Down
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Points: 3666 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAMPION Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 5:11pm
whats going on with all these MINI Bee scoops..!!
What are you trying to acheive ?
ASS & Shortman's have been proven.
Are you trying to design a mini based on the new Drivers ?? or just adding to the collection ?
Sticks n Stones
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(SoundcreationaudiO) View Drop Down
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Joined: 09 October 2007
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Points: 306 		Post Options Post Options   Thanks (0) Thanks(0)   Quote (SoundcreationaudiO) Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 5:19pm
think he's just using his head, and having a go at something... 
     
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CHAMPION View Drop Down
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Points: 3666 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAMPION Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 5:25pm
oky if thats the case...i could do with mini scoops which can play high 100-120hz having a punchy kick, and also play low 50hz ? max output volume.
 
Which mini will do this, small chamber i take it.
 
i can do with them rather than a double 18 cab
 
Three bee dont take it in a wrong way. 
Good Investigation work..
 


Edited by CHAMPION - 28 December 2008 at 5:28pm
Sticks n Stones
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nickyburnell View Drop Down
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Points: 4410 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nickyburnell Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 6:12pm
Originally posted by CHAMPION CHAMPION wrote:

whats going on with all these MINI Bee scoops..!!
What are you trying to acheive ?
ASS & Shortman's have been proven.
Are you trying to design a mini based on the new Drivers ?? or just adding to the collection ?
 
Not so: Ass and Shortman can be as brilliant as you like but they are not DIY, this is a DIY forum called Speaker Plans after all.
 Hapyy New YearBig smile
It's everything, not everythink!
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Hugo Biermann View Drop Down
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Points: 809 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hugo Biermann Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 7:34pm
Looks like there's 0 expansion on the last bit when you look at these pics. I can make it expand if you like though.... Wont change much with the output.
www.aggressiveaudio.co.za
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Hugo Biermann View Drop Down
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Points: 809 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hugo Biermann Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 7:54pm
Here is the SPL Response with the SD18. The 1w response is the same and only about 1dB up on the 650EL.

http://img156.imageshack.us/img156/8126/minispleased18py0.jpg
www.aggressiveaudio.co.za
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Hugo Biermann View Drop Down
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Joined: 05 February 2005
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Points: 809 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hugo Biermann Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2008 at 7:54pm
http://img156.imageshack.us/img156/8126/minispleased18py0.jpg
www.aggressiveaudio.co.za
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