Speakerplans.com Homepage
Forum Home Forum Home > General > Newbie Discussion
  New Posts New Posts RSS Feed - oberton no real lows?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

oberton no real lows?

 Post Reply Post Reply Page  123>
Author
Message
bassdesigner View Drop Down
Registered User
Registered User


Joined: 17 July 2016
Location: Lancashire
Status: Offline
Points: 228
Post Options Post Options   Thanks (0) Thanks(0)   Quote bassdesigner Quote  Post ReplyReply Direct Link To This Post Topic: oberton no real lows?
    Posted: 13 March 2017 at 4:51pm
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
Back to Top
mobiele eenheid View Drop Down
Old Croc
Old Croc


Joined: 15 August 2004
Location: Netherlands
Status: Offline
Points: 1568
Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 5:08pm
What filter type for the high pass?
Back to Top
snowflake View Drop Down
Old Croc
Old Croc


Joined: 29 December 2004
Location: Bristol
Status: Offline
Points: 3118
Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 5:21pm
try testing without the filter for a start.
Back to Top
levyte357- View Drop Down
Old Croc
Old Croc
Avatar

Joined: 27 July 2012
Location: UK, South East
Status: Offline
Points: 8128
Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 5:31pm
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
Global Depopulation - Alive and Killing.
Back to Top
bassdesigner View Drop Down
Registered User
Registered User


Joined: 17 July 2016
Location: Lancashire
Status: Offline
Points: 228
Post Options Post Options   Thanks (0) Thanks(0)   Quote bassdesigner Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 5:35pm
Originally posted by mobiele eenheid mobiele eenheid wrote:

What filter type for the high pass?

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.
Back to Top
levyte357- View Drop Down
Old Croc
Old Croc
Avatar

Joined: 27 July 2012
Location: UK, South East
Status: Offline
Points: 8128
Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 5:47pm
Originally posted by bassdesigner bassdesigner wrote:

Originally posted by mobiele eenheid mobiele eenheid wrote:

What filter type for the high pass?

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.


Kappa Pro 15lf2, para meters suggest good for reflex.

Nothing like OB15B500.
Global Depopulation - Alive and Killing.
Back to Top
bassdesigner View Drop Down
Registered User
Registered User


Joined: 17 July 2016
Location: Lancashire
Status: Offline
Points: 228
Post Options Post Options   Thanks (0) Thanks(0)   Quote bassdesigner Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 5:54pm
Originally posted by levyte357- levyte357- wrote:

Originally posted by bassdesigner bassdesigner wrote:

Originally posted by mobiele eenheid mobiele eenheid wrote:

What filter type for the high pass?

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.


Kappa Pro 15lf2, para meters suggest good for reflex.

Nothing like OB15B500.


Not kappa pro just standard kappa lf, have used these with great success in past so no they work in reflex!
Back to Top
Conanski View Drop Down
Old Croc
Old Croc
Avatar

Joined: 26 January 2006
Location: Ottawa, Canada
Status: Offline
Points: 2515
Post Options Post Options   Thanks (0) Thanks(0)   Quote Conanski Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 5:57pm
Originally posted by bassdesigner bassdesigner wrote:

I currently have oberton 15b500 loaded into a pair of twin 15'' subs, the drivers are loaded like the mn-238 soff 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.
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?


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
Back to Top
MarjanM View Drop Down
Old Croc
Old Croc
Avatar

Joined: 10 February 2005
Location: Macedonia
Status: Offline
Points: 7810
Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 6:03pm
That is a 60hz box. How does that qualify as a subwoofer?
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
bassdesigner View Drop Down
Registered User
Registered User


Joined: 17 July 2016
Location: Lancashire
Status: Offline
Points: 228
Post Options Post Options   Thanks (0) Thanks(0)   Quote bassdesigner Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 6:05pm
Originally posted by Conanski Conanski wrote:

Originally posted by bassdesigner bassdesigner wrote:

I currently have oberton 15b500 loaded into a pair of twin 15'' subs, the drivers are loaded like the mn-238 soff 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.
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?


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.



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.
Back to Top
mobiele eenheid View Drop Down
Old Croc
Old Croc


Joined: 15 August 2004
Location: Netherlands
Status: Offline
Points: 1568
Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 10:52pm
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.
Back to Top
mini-mad View Drop Down
Old Croc
Old Croc
Avatar

Joined: 13 July 2012
Location: london
Status: Offline
Points: 6903
Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2017 at 11:33pm
maybe a slight bump in EQ might help a touch. just watch that excusion!
If it sounds like a gorilla is trying to escape, turn it down.
Back to Top
 Post Reply Post Reply Page  123>

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.125 seconds.