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    Posted: 07 May 2011 at 8:40am
what are the measurements for small chamber, medium chamber, large chamber, and what sort sound one can get from these different chambers sizes?
 
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TechnoChef View Drop Down
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A large chamber gives deeper bass but less cone control. A small chamber gives higher power handling/SPL but less low frequency extension.
I don't know at what measurement it stops being small and becomes large though. Someone with more knowledge will enlighten us soon no doubt!
When they do, could they also please explain what t/s parameters to look at in deciding whether a small or large chamber is needed?      ta!
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any answers/opinions??
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some info here; http://forum.speakerplans.com/pd1851-vs-pd1850-in-standard-scoops_topic63676_post634449.html?KW=scoop+chamber+size#634449
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Originally posted by TechnoChef TechnoChef wrote:

A large chamber gives deeper bass but less cone control. A small chamber gives higher power handling/SPL but less low frequency extension.
I don't know at what measurement it stops being small and becomes large though. Someone with more knowledge will enlighten us soon no doubt!
When they do, could they also please explain what t/s parameters to look at in deciding whether a small or large chamber is needed?      ta!
As in all different types of boxes, perhaps only one speaker will be near perfect. whether small medium or large chamber, the compliance of the speaker will have a baring on cone control.
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would say 9in down=small,9-11inchs=medium,11+ large Smile 
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just read that back it sounds obsene i am talking about  scoop chamber sizes LOLLOLLOL

Edited by paulus - 01 June 2012 at 11:25am
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project 1 View Drop Down
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Small chamber     : 185mm - 205mm
Medium chamber : 205mm - 254 mm
Large chamber    : > 254mm


Small chamber
Most efficient, huge amount of pressure and throw, needs plenty eq to go really deep, unless 4+ cabs, Should have very good driver control, great for outside or large venues

Medium chamber
Good throw + SPL with efficient drivers, very little EQ to go deep, 2x cabs can go real low, OK driver control with good drivers, great for small/medium/large indoor venues

Large Chamber
Least efficient, Will go very deep with little or no eq, will be loud and deep close up, not as much throw, as above 2x, reduced driver control at high power, best for smaller venues

All depends on driver used, if cab designed properly, length of rear baffle, expansion rate of cab.
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Originally posted by project 1 project 1 wrote:

Small chamber     : 185mm - 205mm
Medium chamber : 205mm - 254 mm
Large chamber    : > 254mm


Small chamber
Most efficient, huge amount of pressure and throw, needs plenty eq to go really deep, unless 4+ cabs, Should have very good driver control, great for outside or large venues

Medium chamber
Good throw + SPL with efficient drivers, very little EQ to go deep, 2x cabs can go real low, OK driver control with good drivers, great for small/medium/large indoor venues

Large Chamber
Least efficient, Will go very deep with little or no eq, will be loud and deep close up, not as much throw, as above 2x, reduced driver control at high power, best for smaller venues

All depends on driver used, if cab designed properly, length of rear baffle, expansion rate of cab.



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Goal is to make chamber for geting 36Hz, don't need to go lower.
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the throw nonsense again
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Originally posted by TONY.A.S.S. TONY.A.S.S. wrote:

Originally posted by TechnoChef TechnoChef wrote:

A large chamber gives deeper bass but less cone control. A small chamber gives higher power handling/SPL but less low frequency extension.
I don't know at what measurement it stops being small and becomes large though. Someone with more knowledge will enlighten us soon no doubt!
When they do, could they also please explain what t/s parameters to look at in deciding whether a small or large chamber is needed?      ta!
As in all different types of boxes, perhaps only one speaker will be near perfect. whether small medium or large chamber, the compliance of the speaker will have a baring on cone control.


Tony can you elaborate on this a bit for the 'less educated lot in all things scoop'
When you gonna send me some $$ mate ?
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