which subwoofer for 250W@4ohms class D amp ? - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th July 2012, 11:39 AM   #11
diyAudio Member
 
Join Date: Jul 2012
Tank you everybody !!!!!!!
I entered the speakers you've talked about in my previous table (the -supposed- best one on the top).
The values have been calculated only with T&S parameters for Bass Reflex (Bessel) : I don't know if they are far from reality or not........
I don't know if 4th order bandpass would be a good solution too...
And what do you think about Monacor SPH390TC in bessel BR ?

Click the image to open in full size.
  Reply With Quote
Old 15th July 2012, 12:15 PM   #12
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by FroggySeven View Post
Tank you everybody !!!!!!!
I entered the speakers you've talked about in my previous table (the -supposed- best one on the top).
The values have been calculated only with T&S parameters for Bass Reflex (Bessel) : I don't know if they are far from reality or not........
I don't know if 4th order bandpass would be a good solution too...
And what do you think about Monacor SPH390TC in bessel BR ?

Click the image to open in full size.
FYI: To make a true 'Bessel' ported box, you need drivers with a Qts of close to 0.33.

b
  Reply With Quote
Old 15th July 2012, 02:39 PM   #13
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
And what do you think about Monacor SPH390TC in bessel BR ?
For to be used as a sub: I would consider to build a T-TQWT with sloping FR instead of any BR.

b
Attached Images
File Type: jpg MonacorSPH390TC_T-TQWT.JPG (233.5 KB, 115 views)
  Reply With Quote
Old 15th July 2012, 05:57 PM   #14
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
FroggySeven, can't you use the Eminence Legend BP102, in all similar to the Monacor SPH390TC, only 92.0 dB/2.83V/m (E) vs. 95.0 dB/2.83V/m (M), smaller basket 10" vs 15", and a smaller enclosure?
Certainly that with a big enclosure my choice would be different as bjorno shows 213 L for the Monacor.
Also check the new BEYMA 10BR60 v2011 with 90.0 dB/2.83V/m.
Also consider that, when the footprint/size of the enclosure (VB) is small plus the price of the drivers you can double (2x) the drivers and add 6dB's to the total output/sensitivity.

Last edited by Inductor; 15th July 2012 at 06:24 PM.
  Reply With Quote
Old 15th July 2012, 06:38 PM   #15
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
Quote:
Originally Posted by FroggySeven View Post
It's for home, so no problem up to 150L (but the smaller, the better...and why not bigger if it is worth)
Also give some consideration for the type of speakers you're building, here sealed type notes from tvrgeek-diyAudio
Many sub questions
  Reply With Quote
Old 16th July 2012, 03:09 PM   #16
diyAudio Member
 
Join Date: Jul 2012
I must admit I don't understand what "tapped horn" or "PPSL" is.

bjorno : I think I have understood on the picture what is " T-TQWT with sloping FR ".
I think this would be really funny in a horizontal position with a glass table on !!!
But I am not able at all to make the plans...
Which speaker do you used ?

Last edited by FroggySeven; 16th July 2012 at 03:11 PM.
  Reply With Quote
Old 16th July 2012, 03:24 PM   #17
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by FroggySeven View Post
I must admit I don't understand what "tapped horn" or "PPSL" is.

bjorno : I think I have understood on the picture what is " T-TQWT with sloping FR ".
I think this would be really funny in a horizontal position with a glass table on !!!
But I am not able at all to make the plans...
Which speaker do you used ?
Hi, Your idea of a horizontal deign would work well with two folds..I used the first driver in you performance/prize list: The Monacor SPH390TC and this name is also stated in the HR Input screen.

b
  Reply With Quote
Old 17th July 2012, 07:29 PM   #18
diyAudio Member
 
Join Date: Jul 2012
I bought two SPH390TC today on the net !!! I hope they'll come soon )

I think I will be able to adapt your plan to a more circular outline.
I'll tell you when the speaker will arrive
  Reply With Quote
Old 18th July 2012, 12:30 AM   #19
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
FroggySeven, congratulations for your new future project build.
Hope you like the drivers. A little big for me, but without any more components in your system to match with it's going to be funny to watch how it will end up. A system like that it's going to require lot's of space.
  Reply With Quote
Old 18th July 2012, 05:38 AM   #20
diyAudio Member
 
Join Date: Jul 2012
Of course I hesitated about the volume with Eminence Legend BP102, BEYMA 10BR60, and Atohm D300P0...
And it's not only about the WAF : wood is expensive too !!!

But if the SPL in enough, I'll perhaps use only one speaker, so...
(and I have two other projects in mind to use the second one if necessary).
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
subwoofer powered by class t-amp? HifiBoyDenmark Subwoofers 10 10th May 2012 04:02 PM
best class d amp for subwoofer sasek Class D 1 19th May 2011 05:19 PM
Looking 500W 4ohms amplifier for Polk Subwoofer samsagaz Subwoofers 4 24th June 2009 08:47 AM
NX400 - 400W RMS@4Ohms Lateral Mosfet Power Amplifier Module by Class-D for sale magnum_1 Swap Meet 16 13th June 2009 03:59 PM
PE 250W Subwoofer Plate Amp pjanda1 Swap Meet 2 27th March 2007 03:15 PM


New To Site? Need Help?

All times are GMT. The time now is 02:41 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2