Speakerplans.com Homepage
Forum Home Forum Home > Plans > Ported Enclosures
  New Posts New Posts RSS Feed - New Push-Pull 15"
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

New Push-Pull 15"

 Post Reply Post Reply Page  <1 34567 10>
Author
Message
Sheggy View Drop Down
Old Croc
Old Croc


Joined: 23 May 2008
Location: London
Status: Offline
Points: 1989
Post Options Post Options   Thanks (0) Thanks(0)   Quote Sheggy Quote  Post ReplyReply Direct Link To This Post Posted: 08 July 2013 at 9:09pm
Back to Top
t.geessounds View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 May 2010
Location: US... New york
Status: Offline
Points: 908
Post Options Post Options   Thanks (0) Thanks(0)   Quote t.geessounds Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2013 at 4:24pm
nice
Back to Top
Oscar View Drop Down
Registered User
Registered User


Joined: 22 April 2010
Location: Laredo, Tx
Status: Offline
Points: 100
Post Options Post Options   Thanks (0) Thanks(0)   Quote Oscar Quote  Post ReplyReply Direct Link To This Post Posted: 13 July 2013 at 3:43am
Sorry if I missed it, but why not place the drivers on axis to get the benefit from PPSL?
Back to Top
Tony Wilkes View Drop Down
Old Croc
Old Croc
Avatar

Joined: 02 August 2004
Location: West Midlands
Status: Offline
Points: 4840
Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2013 at 5:43pm
My thanks to Joost for sending me the images and allowing them to be shown on SP






Edited by Tony Wilkes - 21 July 2013 at 5:44pm
www.forteaudio.eu - BMS - db-Mark Processors - Lexon (SAE)
Back to Top
djeddie View Drop Down
Old Croc
Old Croc
Avatar

Joined: 26 April 2004
Location: Bristol
Status: Offline
Points: 4125
Post Options Post Options   Thanks (0) Thanks(0)   Quote djeddie Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2013 at 7:16pm
That is a nice box Tony. And seems smaller in real life than the description!
Chas n Dave : it's like Drum and Bass but with beards.             E=mc² ±3dB
Back to Top
Edd Jordan View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 January 2008
Location: United Kingdom
Status: Offline
Points: 1364
Post Options Post Options   Thanks (0) Thanks(0)   Quote Edd Jordan Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2013 at 8:46pm
That looks tiny bet it needs some welly to get it going. is that a couple of bms15" i spy? 
great work as all ways Tony and great build too Joost! any data yet for us?
I do a sideline in ply wood wheels.
Back to Top
overdrive View Drop Down
Registered User
Registered User


Joined: 13 July 2004
Location: Netherlands
Status: Offline
Points: 21
Post Options Post Options   Thanks (0) Thanks(0)   Quote overdrive Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2013 at 9:50pm
Hi Edd and others,

Indeed a pair of BMS 15S330, like Tony designed it for :) 
Sounds very clean and fast response, exactly like Tony intended.
Working on finding the right EQ for B6 type allignment now together with Tony.

Did some quick measurements with Smaart. Hope to do an impedance measurement soon to validate the Fb.
LPF LR48 150Hz, no EQ:

Best, Joost


Edited by overdrive - 22 July 2013 at 11:57pm
Back to Top
Edd Jordan View Drop Down
Young Croc
Young Croc
Avatar

Joined: 10 January 2008
Location: United Kingdom
Status: Offline
Points: 1364
Post Options Post Options   Thanks (0) Thanks(0)   Quote Edd Jordan Quote  Post ReplyReply Direct Link To This Post Posted: 21 July 2013 at 11:08pm
Man thats tidy for no eq Thumbs Up
I do a sideline in ply wood wheels.
Back to Top
ermita View Drop Down
Young Croc
Young Croc
Avatar

Joined: 19 August 2010
Location: Surrey, TW10
Status: Offline
Points: 1266
Post Options Post Options   Thanks (0) Thanks(0)   Quote ermita Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2013 at 12:09am
Originally posted by Edd Jordan Edd Jordan wrote:

Man thats tidy for no eq Thumbs Up

+1 Clap
Back to Top
overdrive View Drop Down
Registered User
Registered User


Joined: 13 July 2004
Location: Netherlands
Status: Offline
Points: 21
Post Options Post Options   Thanks (0) Thanks(0)   Quote overdrive Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2013 at 9:30pm
Today I did an impedance measurement to check the Fb and its almost on target, need to tweak just a bit!

Also applied the B6 alignment correction. Unfortuneately Smaart crashed and lost that measurement...Ouch But can tell that with correction, it runs flat till 50Hz then droppes off.

Impedance + phase show Fb ~35Hz(phase=0):



Joost
Back to Top
overdrive View Drop Down
Registered User
Registered User


Joined: 13 July 2004
Location: Netherlands
Status: Offline
Points: 21
Post Options Post Options   Thanks (0) Thanks(0)   Quote overdrive Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2013 at 9:47pm
Some pics from this afternoon, some subs can do a lot of damage measuring with pink noize Tongue



25meters away, other side of house: 

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: 22 July 2013 at 11:07pm
Can you measure the boxes without any HPF? That way we can see how low it really goes. It does look to me that the back chamber can do a little bit better under 55Hz. Can you put the mic right on the round port exit so can see where the back chamber is tuned? Front one seems to be spot on where it suppose to be.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
 Post Reply Post Reply Page  <1 34567 10>

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 0.109 seconds.