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MusicXtra
Registered User Joined: 05 August 2009 Location: Netherlands Status: Offline Points: 249 |
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Posted: 25 September 2009 at 4:06pm |
For my line-array I was looking for a good sub.
I tried punishers but they didn't go low enough. I tried B2's, they go low enough but they didn't sound good enough and they are very big. I tried front-loaded 18" BR, they are to big and not loud enough. Finally I start drawing, calculating, simulating and building a complete new double 18" sub. This sub is loaded with two Beyma 18G550 and tuned on 35 Hz. Today I finished the first prototype in MDF and it sounds very good. The cabinet is 60*70*90 cm and loaded with two 18" Beyma speakers. Next project is building 4 of these cabs in 18mm birch plywood. |
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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looks good!
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me so horny me love you long throw
horn loaded for her pleasure |
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 515 |
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Hi, Is yhis like the EV T18 or Beyma's new sub plan or something a bit diff????VECTORDJ
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MusicXtra
Registered User Joined: 05 August 2009 Location: Netherlands Status: Offline Points: 249 |
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Could be, I didn't look to other plans with developing this sub. So this is 100% my own design. |
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mrchay
Young Croc Joined: 29 September 2008 Status: Offline Points: 565 |
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Its certainly nothing like the EV T18, even just judging from the pics of both cabs.
It looks very much like beyma's new sub cab, but doubled up. so same principle (advanced reflex loading, or tapped-horn-ish, or whatever its fashionable to call this these days). |
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james folkes
Old Croc Joined: 08 January 2005 Location: United Kingdom Status: Offline Points: 3064 |
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cor mister, how's that work then?
have you got a picture with the side off? good size for an f3 of 35Hz with medium/high sensitivity... james.
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mardy hippy.
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Drimacoustic
Registered User Joined: 01 July 2006 Location: Slovakia Status: Offline Points: 132 |
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Design seems to be similar with EAW SB1000 without 4 round ports in corners.
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love begins below 40Hz
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Jake_Fielder
Old Croc Joined: 08 October 2007 Status: Offline Points: 4231 |
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is the port coming out between the drivers?
What method did you use to tune this? cheers |
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MusicXtra
Registered User Joined: 05 August 2009 Location: Netherlands Status: Offline Points: 249 |
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The port comes out between the drivers, the tuning was the biggest problem, normal calculation programs didn't work. I did a lot of trial and error with different port length and every time I listend and measured with a sine wave and watch the cones for the X-max. |
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Jake_Fielder
Old Croc Joined: 08 October 2007 Status: Offline Points: 4231 |
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cool, how long is the port? or does it just end at the end of the drivers?
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MusicXtra
Registered User Joined: 05 August 2009 Location: Netherlands Status: Offline Points: 249 |
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The port is 23 cm but it is difficult to say where the port starts. |
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MusicXtra
Registered User Joined: 05 August 2009 Location: Netherlands Status: Offline Points: 249 |
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Here a picture of a few different subs for comparing and measuring.
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