Speakerplans.com Homepage
Forum Home Forum Home > Plans > Ported Enclosures
  New Posts New Posts RSS Feed - Reflex design
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Reflex design

 Post Reply Post Reply
Author
Message
Calculus View Drop Down
Young Croc
Young Croc


Joined: 03 January 2005
Location: Newcastle Uk
Status: Offline
Points: 1105
Post Options Post Options   Thanks (0) Thanks(0)   Quote Calculus Quote  Post ReplyReply Direct Link To This Post Topic: Reflex design
    Posted: 20 May 2015 at 3:09pm
Has anybody modelled or got a plan for a reflex sub with this layout... It looks a good sturdy style of reflex 

Always a compromise, You can't have everything...

Where would you put it all.
Back to Top
Calculus View Drop Down
Young Croc
Young Croc


Joined: 03 January 2005
Location: Newcastle Uk
Status: Offline
Points: 1105
Post Options Post Options   Thanks (0) Thanks(0)   Quote Calculus Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 3:22pm
bit more searching and found this think its for a 15" though and I'm looking for a 18"
Always a compromise, You can't have everything...

Where would you put it all.
Back to Top
Calculus View Drop Down
Young Croc
Young Croc


Joined: 03 January 2005
Location: Newcastle Uk
Status: Offline
Points: 1105
Post Options Post Options   Thanks (0) Thanks(0)   Quote Calculus Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 3:28pm
b&c sub 21 using same layout also
Always a compromise, You can't have everything...

Where would you put it all.
Back to Top
immortal View Drop Down
Registered User
Registered User


Joined: 07 January 2013
Location: Sheffield
Status: Offline
Points: 460
Post Options Post Options   Thanks (0) Thanks(0)   Quote immortal Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2015 at 3:39pm
You could try designing one using WinISD and some 3d modelling software or just a notepad and pen.

It is not too hard and would be for a specific driver.
Cemetery Sounds
Back to Top
Calculus View Drop Down
Young Croc
Young Croc


Joined: 03 January 2005
Location: Newcastle Uk
Status: Offline
Points: 1105
Post Options Post Options   Thanks (0) Thanks(0)   Quote Calculus Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 12:04am
I could and probably will but was also looking for anybodies experience regarding using this layout.
Always a compromise, You can't have everything...

Where would you put it all.
Back to Top
ceharden View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 05 June 2005
Location: Southampton
Status: Offline
Points: 11776
Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 12:54am
All my 18" subs use that type of design, as does the D&B QSub and various Martin Audio subs eg S218.

The corner ports contribute a huge amount of stiffness to the cabinet.  I really like the configuration.

What you will find is that the port position will tend to cause the tuning to come out quite a bit lower than a simulation might suggest.  You get a lot of effective port extension from the corner position.
Back to Top
Copa disco View Drop Down
Registered User
Registered User
Avatar

Joined: 07 January 2014
Location: Brasil
Status: Offline
Points: 66
Post Options Post Options   Thanks (0) Thanks(0)   Quote Copa disco Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 2:57am
B&C has speakerdesigns something like this. The ports are at only 2 corners.
check it out!!
Back to Top
csg View Drop Down
Old Croc
Old Croc


Joined: 17 September 2007
Location: bedford
Status: Offline
Points: 6086
Post Options Post Options   Thanks (0) Thanks(0)   Quote csg Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 10:00am
im a big fan of this layout and have a very big pile of single 18" subs using a very similar layout. It is a commercial design so i cant share the plans, but would make the following comments

As ceharden states, tuning will be lower than sims suggest - so shorten or oversize your vents, around 10% is a good starting point

Brace Brace Brace - in my opinion, one of the major reasons reflex boxes have a poor reputation for kick or impulse response is due to panel movement robbing the enclosure of coherent output from the front. The stiffer the box is, the less energy is wasted in the panels, and the better the enclosure will sound. Corner bracing is a good start, but the internals of mine use a further 12 individual braces to create n exceptionally rigid box.

round off any port openings, this will help minimise any port noise. Due to the placement, corner ports are less forgiving of high air velocity.
“The fact is this is about identifying what we do best and finding more ways of doing less of it better”
Back to Top
Calculus View Drop Down
Young Croc
Young Croc


Joined: 03 January 2005
Location: Newcastle Uk
Status: Offline
Points: 1105
Post Options Post Options   Thanks (0) Thanks(0)   Quote Calculus Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 2:16pm
how do you model the triangular ports in win isd? do you do them as two square ports then half them? Also does anyone have a data base file for winisd that has a lot of good common pa reflex drivers in it?
Always a compromise, You can't have everything...

Where would you put it all.
Back to Top
Calculus View Drop Down
Young Croc
Young Croc


Joined: 03 January 2005
Location: Newcastle Uk
Status: Offline
Points: 1105
Post Options Post Options   Thanks (0) Thanks(0)   Quote Calculus Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 2:18pm
a little more research turned up this http://forum.speakerplans.com/bass-reflex-subs_topic19758.html
Always a compromise, You can't have everything...

Where would you put it all.
Back to Top
Calculus View Drop Down
Young Croc
Young Croc


Joined: 03 January 2005
Location: Newcastle Uk
Status: Offline
Points: 1105
Post Options Post Options   Thanks (0) Thanks(0)   Quote Calculus Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 2:25pm
also this http://forum.speakerplans.com/new-bms-reflex-sub_topic61603_page3.html
Always a compromise, You can't have everything...

Where would you put it all.
Back to Top
Radeon View Drop Down
Registered User
Registered User


Joined: 22 November 2011
Location: Croatia
Status: Offline
Points: 277
Post Options Post Options   Thanks (0) Thanks(0)   Quote Radeon Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 2015 at 2:49pm
There is nothing special about triangle ports,they complicate the box design a bit. BassBox can simulate triangle ports .
For an 18" you can start with 160L box if you want compact solution , or ~200 for an more low end.I did some PD186 version 1 sims but never got time to build the cabs and listen.
I can send you some data if you wish but theres no reason why you could not do it yourself.
Back to Top
 Post Reply Post Reply

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 0.141 seconds.