oberton no real lows? |
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bassdesigner
Registered User Joined: 17 July 2016 Location: Lancashire Status: Offline Points: 228 |
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Posted: 13 March 2017 at 4:51pm |
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I currently have oberton 15b500 loaded into a pair of twin 15'' subs, the drivers are loaded like the mn-238 off free speakerplans. each driver enclosure is 116l enclosure tuned to approx 40hz and after doing some test tones they start to fall off rapidly after 48hz. high pass is at 39hz 24db any suggestions? cab dimensions are 450mm width by 700mm deep by 370mm high with a 70mm x 450mm port which is 300mm deep, any suggestions as two what is going on?
Edited by bassdesigner - 13 March 2017 at 7:59pm |
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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What filter type for the high pass?
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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try testing without the filter for a start.
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Parameters for 15B500 suggest optimal loading in horn loaded cab, not reflex.
Can't just buy a driver because it's cheap, & expect it to work in your chosen cab. Edited by levyte357- - 13 March 2017 at 5:43pm |
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Global Depopulation - Alive and Killing.
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bassdesigner
Registered User Joined: 17 July 2016 Location: Lancashire Status: Offline Points: 228 |
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butterworth, have tried lowering high pass filter with no real change, and lev I thought looking at parameters that these would be an upgrade from the kappa lf I had installed already as the kappa 15lf is also suitable for horn loading. |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Kappa Pro 15lf2, para meters suggest good for reflex. Nothing like OB15B500. |
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Global Depopulation - Alive and Killing.
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bassdesigner
Registered User Joined: 17 July 2016 Location: Lancashire Status: Offline Points: 228 |
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Not kappa pro just standard kappa lf, have used these with great success in past so no they work in reflex! |
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Conanski
Old Croc Joined: 26 January 2006 Location: Ottawa, Canada Status: Offline Points: 2515 |
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Your build is tuned higher than you think, did you model it first or just spit ball something that looked good? And FYI.. drivers won't change an enclosures response they either work well with it or they don't. The MN-238 on freespeakerplans is tuned to 52hz just so you know. Edited by Conanski - 13 March 2017 at 5:58pm |
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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That is a 60hz box. How does that qualify as a subwoofer?
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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bassdesigner
Registered User Joined: 17 July 2016 Location: Lancashire Status: Offline Points: 228 |
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used win-isd to deisgn original cab, the mn-238 was just used as an example to show how the drivers are loaded that is the only similarity. |
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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Are those dimensions the outside dimensions? In that case the cabinet is 116 litre external but it's the internal volume that counts. You have to extract the volume occupied by the wood, driver and port.
Given that those dimensions are the external dimensions the actual cabinet is closer to 80 litres internal, which would give a tuning to roughly 50 Hz. |
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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maybe a slight bump in EQ might help a touch. just watch that excusion!
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If it sounds like a gorilla is trying to escape, turn it down.
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