precision devices pd 1550 - 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 30th July 2012, 02:21 PM   #1
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
Default precision devices pd 1550

i am planing to use this driver 40hz-200hz at bass reflex enclosure.

people say that low qts drivers are meant for horn loading but the

datasheet says it will work for bass reflex too.

i don`t mind using some eq to make it flat.

is there any other flow except that?

i believe the cone control will be awesome because of the very high bl.

is there a reason i shouldn`t use it that i can`t see?

how many litters and tuning would you recommend?

george.
  Reply With Quote
Old 31st July 2012, 08:08 AM   #2
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
The Qts is too low for good performance in a vented box.

Fs 31 Hz
Xmax 8 mm
Revc 6.4 Ohms
Vd 7x10-4 m3
Qts 0.21
No 3.14%
Qms 5.55
Pmx 600 Watts
Qes 0.22
Cms 215 M/N
Vas 242 Litres
Mms 123.4 grams
Sd 890 sq cm
BL 26.34 T/m

But if you want to try it, build a 140L box and tune it to 40hz.
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 31st July 2012, 08:56 AM   #3
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
well, PD1550 is cheap right now because of new model
with EQ its probably a fantastic woofer
but that takes power
the new model does have higher Qts
but hifi, I guess the 18" PD186 could be a better choice, and still affordable

and btw, I think EQ is best done with closed designs
  Reply With Quote
Old 31st July 2012, 09:03 AM   #4
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Quote:
Originally Posted by back View Post

how many litters and tuning would you recommend?

george.
its easy to find find software, and not very difficult to use
its more difficult to 'predict' the actual sound
  Reply With Quote
Old 31st July 2012, 09:50 AM   #5
Rojoh is offline Rojoh  Norway
diyAudio Member
 
Rojoh's Avatar
 
Join Date: Jul 2007
Location: Rogaland
If you haven't bought drivers yet, I can recommend the neo-15 from PD: The PDN-15BR40. Very nice soundig driver for BR.

Fs 35.678 Hz
L1 0.820 mH
L2 1.851 mH
Res 79.625 Ohms
RMSE-load 1.945 Ohms
Qts 0.338
RMSE-free 0.430 Ohms
Qms 5.727
Vas 224.800 Litres
Qes 0.359
Mms 90.949 grams
Sd 855.35 Sq Cm
Cms 218.797 M/N
R2 5.017 Ohms
BL 16.836T/m
Xmax 10.5 mm
Re 5.106 Ohms

The PD-186 is also a good (and bigger) driver for BR.
__________________
Putting out fire with gasoline.
  Reply With Quote
Old 31st July 2012, 10:35 AM   #6
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
pd 186 looks very good.

i couldn`t find price for pdn15br40
  Reply With Quote
Old 31st July 2012, 10:50 AM   #7
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
I reckon all the PD neo woofers are more less obsolete by now
the PD 186 may have been obsolete as well
could be there have been a 'demand' for it

among the PD woofers, the PD186 has pretty good Xmax
probably why its at the lower end of the SPL efficiency scale
which btw often gives better low end efficiency
strange upsidedown logic
  Reply With Quote
Old 31st July 2012, 01:08 PM   #8
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
A variable output impedance amplifier would enable you to increase Qes (and thus Qts) to be more usable.
Download winISD Pro and play with the Added Series Resistance to get it right.
  Reply With Quote
Old 31st July 2012, 02:42 PM   #9
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
it seems that pd1550 is doing well at 110L 40hz.

it needs only 3db boost 40-70hz (40hz is fine for me) and with the room placement

maybe no eq at all and can give 118db at 1m.

i think i will give it a try because pd 186 results to very big box.
  Reply With Quote
Old 1st August 2012, 06:45 PM   #10
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Hi, FYI:

b
Attached Images
File Type: jpg PD-1550_ML-TL_T-TQWT_PDN-15BR40_ML-TL.jpg (736.2 KB, 283 views)
  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
Precision Devices PD.8BM20 inrank Multi-Way 4 21st July 2010 07:53 AM
Precision devices...... Village Plank Multi-Way 10 14th December 2008 07:49 PM
Precision Devices PD.158 Xmax? buggsson Subwoofers 6 20th May 2008 06:55 AM
Precision Devices tinitus Multi-Way 1 8th January 2008 12:57 AM
Precision devices KevinTams Subwoofers 111 22nd December 2005 02:41 PM


New To Site? Need Help?

All times are GMT. The time now is 11:35 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