PD 184 sub bas - 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 March 2010, 01:20 PM   #1
CCU is offline CCU  Denmark
diyAudio Member
 
Join Date: Apr 2007
Location: Kgs. Lyngby
Send a message via MSN to CCU
Default PD 184 sub bas

Hi everyone

a while ago i started this thead Building a low-end sub for outdoor use about building a low end sub.

But long story short. the projekt crached and burned...

So looking for a good sub projekt and i found this projekt Speakerplans.com

Can the mesurements be real? 103db/w
  Reply With Quote
Old 15th March 2010, 03:23 PM   #2
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Old plans, old drivers

New PDN.15BR40 seems a better driver with more Xmax
Since the low Fs PD woofers are gone, I suspect they have had problems with those

If you want a monster sub, take a look at BMS 18N860
Expencive, but its perfect fore closed box with EQ
__________________
sometimes we know very little, and sometimes we know too much
  Reply With Quote
Old 15th March 2010, 05:27 PM   #3
CCU is offline CCU  Denmark
diyAudio Member
 
Join Date: Apr 2007
Location: Kgs. Lyngby
Send a message via MSN to CCU
okay, but are the measurements real? I really need the high efficiency in the first octave, since it's for a batterypower mobile rig

The reason why i choose that plan is because i can get those drivers cheap.

Too expencive and i don't have any eq equipment for this rig
  Reply With Quote
Old 15th March 2010, 06:12 PM   #4
CCU is offline CCU  Denmark
diyAudio Member
 
Join Date: Apr 2007
Location: Kgs. Lyngby
Send a message via MSN to CCU
Do you or anyone else know of a subwoofer with the about the same SPL?
  Reply With Quote
Old 15th March 2010, 06:28 PM   #5
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Quote:
Originally Posted by CCU View Post

I really need the high efficiency in the first octave, since it's for a batterypower mobile rig
Then I think you should go fore a straight 100db driver, with higher Fs

I dont think its efficiency you are looking at
Its more likely the max SPL

If you calculate a design with those low Fs pro woofers you mostly end around 95db sensitivity

But there are some genuine 100db drivers
And you can give it a small peak around 50hz with the box tuning, and gain a few "free" db
__________________
sometimes we know very little, and sometimes we know too much
  Reply With Quote
Old 15th March 2010, 06:38 PM   #6
CCU is offline CCU  Denmark
diyAudio Member
 
Join Date: Apr 2007
Location: Kgs. Lyngby
Send a message via MSN to CCU
Since i'm only using small amps (100watt) for a longer batterylife
i'm looking for efficiency not max SPL, because i can't drive them to max anyway...

Last edited by CCU; 15th March 2010 at 06:46 PM.
  Reply With Quote
Old 15th March 2010, 06:49 PM   #7
diyAudio Member
 
event horizon's Avatar
 
Join Date: Feb 2008
Location: East Midlands, England
Quote:
Originally Posted by CCU View Post
Can the mesurements be real? 103db/w
The PD184 has a standard sensitivity of 97Db 1W/M. As the enclosure desing is a 6th order bandpass then a healthy increase in efficiency isn't out of the question, yes it's definately possible

If i knew all the internal dimensions i'd model it on WinISD pro, but my guess is it'd likely be bang on the money

E2A:- I just tried modelling a 6th order bandpass using the PD184. I got a lot of similar responses but i couldn't get the efficiency over 95Db 1W/M

Maybe it's a good idea to take certain things with a pinch of salt. I don't believe it could do it, though add room gain or cabin gain in a car & it'd still be monsterous.
__________________
"Never let your morals prevent you from doing what is right!" Salvor Hardin

Last edited by event horizon; 15th March 2010 at 06:59 PM.
  Reply With Quote
Old 15th March 2010, 09:09 PM   #8
CCU is offline CCU  Denmark
diyAudio Member
 
Join Date: Apr 2007
Location: Kgs. Lyngby
Send a message via MSN to CCU
The front champer is 58liter and the rear is 168 liters. minus the vents.
I did some modeling, but only ended up with 95 db/w
  Reply With Quote
Old 15th March 2010, 09:28 PM   #9
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
What I expected

You need a 15" with Fs around 50hz
A light cone will give you a 100db driver
Tune it with a small peak before rolloff around 50hz

Maybe something like Eminence Kappalite 3015 might work
Only sim/calculation will tell
I doubt the cheaper semi pro woofers will get up there

Found it at BlueAran.UK, but nowhere else to find it, all LF version

Are you aware that you can get switch mode that convert 12V to higher voltage
But I suppose its no free lunch either
http://classdaudio.com/index.php/12v...car-audio.html
__________________
sometimes we know very little, and sometimes we know too much
  Reply With Quote
Old 15th March 2010, 11:12 PM   #10
Xoc1 is offline Xoc1  United Kingdom
diyAudio Member
 
Xoc1's Avatar
 
Join Date: Nov 2008
Location: Devon UK
A lower power driver will give you greater efficiency.
Try looking at the lower power Eminence 15" drivers
The Beta 15" can handle 100W in a bass cabinet.
http://www.eminence-speaker.com/pdf/cab-beta-15a.pdf
2 of them in a cabinet would give you a few more dB.
Should be easy to optimise a design to make the best use of your 100W.
Another point to make is to use a steep highpass filter to conserve the power.
  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
PD-9300 Laser pickup (PD-71) fastasulike Digital Source 15 15th July 2010 08:51 PM
Pioneer PD-S705 and PD-S904 laser type PAteam Digital Source 6 9th May 2007 02:47 PM
I need schematic to cd player pioneer PD-S601 or PD-S501 misiu Digital Source 3 10th February 2006 07:42 PM


New To Site? Need Help?

All times are GMT. The time now is 11:56 AM.


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