Speakerplans.com Homepage
Forum Home Forum Home > Plans > Other plans
  New Posts New Posts RSS Feed - THAM 12 - a compact 12" TH
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

THAM 12 - a compact 12" TH

 Post Reply Post Reply Page  <1 111213
Author
Message
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: 02 August 2023 at 1:14pm
12NDL76 is completely wrong driver for that box.

Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
roopes View Drop Down
Registered User
Registered User


Joined: 04 January 2016
Status: Offline
Points: 83
Post Options Post Options   Thanks (0) Thanks(0)   Quote roopes Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2023 at 1:18pm
Originally posted by MarjanM MarjanM wrote:

12NDL76 is completely wrong driver for that box.


ok why is it wrong? Im new to this and saw a lot of people on youtube having it and the sim looks good so I thought it was a good idea, low weight and 100db sensitivty perfect for battery system. But hey then i might have to build another one with a different driver then. What driver do you recommend with a neo magnet? (need low weight)






Edited by roopes - 02 August 2023 at 2:02pm
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: 02 August 2023 at 6:39pm
Its a mid-bass driver, not bass driver. The 100db sensitivity is from 500Hz to 1500Hz. That has nothing to do how it will do in a subwoofer cabinet. 
It has too light cone and not enough x-max to be run down to 40Hz.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
roopes View Drop Down
Registered User
Registered User


Joined: 04 January 2016
Status: Offline
Points: 83
Post Options Post Options   Thanks (0) Thanks(0)   Quote roopes Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2023 at 7:26pm
But it sure has more efficiency than a speaker with say 85db sensitivity? 

I understand that this is not a sub bass, I’m not looking for 20-40hz range. I’m only looking for much spl output and more thump then my soundboks3 to complement it. Usually real subwoofer drivers are harder to drive and sacrifices spl for deeper soundwaves. And with only a battery driven amplifier I don’t think it will be loud enough to tag along with the soundboks. 

What driver would you have chosen? If weight and efficiency is key, has to have good sim or real world test. 


Edited by roopes - 02 August 2023 at 7:26pm
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: 02 August 2023 at 7:30pm
12NDL76 is 85db at 80Hz :)




Edited by MarjanM - 02 August 2023 at 7:31pm
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
roopes View Drop Down
Registered User
Registered User


Joined: 04 January 2016
Status: Offline
Points: 83
Post Options Post Options   Thanks (0) Thanks(0)   Quote roopes Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2023 at 7:40pm
Originally posted by MarjanM MarjanM wrote:

12NDL76 is 85db at 80Hz :)



Yes and the recommended beyma is like 85db at 65-70hz so not too far away? But that driver is 10kg. 

So I ask the third time, what driver do you recommend?




Edited by roopes - 02 August 2023 at 9:42pm
Back to Top
FOO View Drop Down
Young Croc
Young Croc
Avatar

Joined: 23 December 2018
Location: Denmark
Status: Offline
Points: 813
Post Options Post Options   Thanks (0) Thanks(0)   Quote FOO Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2023 at 9:44pm
Beyma 12P80nd. 
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: 02 August 2023 at 9:47pm
Originally posted by FOO FOO wrote:

Beyma 12P80nd. 

Again a mid-low box. Not a subwoofer box.
Something like 12NBX100 would be my choice, or Beyma 12LEX1000nd


Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
Xoc1 View Drop Down
Registered User
Registered User


Joined: 15 October 2012
Location: Devon UK
Status: Offline
Points: 397
Post Options Post Options   Thanks (0) Thanks(0)   Quote Xoc1 Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2023 at 10:28pm
The Beyma 12P80nd gives almost exactly the same response as the B&C 12NDL76 in a 2.83V sim. The Beyma has a 4" voice coil vs a 3" for the B&C and has an extra 0.5 mm Xmax But is nearly double the cost. 
Given that Roopes is building a relatively low power system for battery use I would not expect over excursion or thermal compression to be much of a problem. As far as I can see the Sim Roopes has posted for the B&C 12NDL76 is taken directly from Martinsons own blog!
If you look thru the sims listed there it looks good compared with the alternatives.
But all the sims shown are 1Pi, so On the floor & next to a back wall.
The Tham 12 needs about a 40hz hi pass - and in my opinion is a bit small for a 12" TH!

Back to Top
Xoc1 View Drop Down
Registered User
Registered User


Joined: 15 October 2012
Location: Devon UK
Status: Offline
Points: 397
Post Options Post Options   Thanks (0) Thanks(0)   Quote Xoc1 Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2023 at 10:41pm
.




Edited by Xoc1 - 02 August 2023 at 10:46pm
Back to Top
FOO View Drop Down
Young Croc
Young Croc
Avatar

Joined: 23 December 2018
Location: Denmark
Status: Offline
Points: 813
Post Options Post Options   Thanks (0) Thanks(0)   Quote FOO Quote  Post ReplyReply Direct Link To This Post Posted: 02 August 2023 at 11:13pm
Originally posted by MarjanM MarjanM wrote:

Originally posted by FOO FOO wrote:

Beyma 12P80nd. 

Again a mid-low box. Not a subwoofer box.
Something like 12NBX100 would be my choice, or Beyma 12LEX1000nd



But it works. And the audible difference between 12P80nd and 12lx60 is very very little. The tiny difference are well worth the 5kg less total weight Smile
Back to Top
 Post Reply Post Reply Page  <1 111213

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.