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scoop chamber sizes
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Young Croc
Young Croc


Joined: 18 June 2008
Location: manchester
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Points: 996 		Post Options Post Options   Thanks (0) Thanks(0)   Quote hi grade Quote  Post ReplyReply Direct Link To This Post Posted: 29 July 2012 at 6:59pm
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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RealitySound View Drop Down
Young Croc
Young Croc
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Joined: 01 February 2011
Location: Bermuda
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Points: 1142 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RealitySound Quote  Post ReplyReply Direct Link To This Post Posted: 29 July 2012 at 7:04pm
So if its a med chamber and the driver is flapping around a bit, bringing the rear baffle forward will stop this?
When you gonna send me some $$ mate ?
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APSUS View Drop Down
Registered User
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Joined: 08 May 2011
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Points: 49 		Post Options Post Options   Thanks (0) Thanks(0)   Quote APSUS Quote  Post ReplyReply Direct Link To This Post Posted: 26 June 2023 at 12:38am
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.


Years later would we agree on this. Does anyone remember how Ren APS scoops sounded compared to todays large chamber scoops. 
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levyte357- View Drop Down
Old Croc
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Joined: 27 July 2012
Location: UK, South East
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Points: 8517 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 26 June 2023 at 9:14am
Originally posted by APSUS APSUS wrote:

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.


Years later would we agree on this. Does anyone remember how Ren APS scoops sounded compared to todays large chamber scoops. 


If "project1", is indeed the original author of the above, maybe he would like to explain, how he arrived at the sizes, and examples of each..


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