precision devices pd 1550 - 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 28th September 2012, 10:44 AM   #11
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Quote:
Originally Posted by back View Post
i am planing to use this driver .....
george.
me too
and beat the crap out of it with seriously heavy cone modding/coating
my first subwoofer

hey, back, how did it go with your project ?
  Reply With Quote
Old 14th November 2012, 09:56 PM   #12
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Quote:
Originally Posted by tinitus View Post
........ cone modding/coating
well, I got 'second thoughts', and looked at better options

but yesterday I spotted a new software tool
it calculates new Fs and Qts values

lets try adding 100gr mass to the original mms 125gr of the PD1550
with the lowish original mms it gives
should result in Fs 23hz and 0.28 Qts, and 94db SPL

a real heavyweight pro woofer with those specs, isnt that just cool
  Reply With Quote
Old 15th November 2012, 07:47 PM   #13
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
tried to ad 100gr mass to the PD186
interesting driver for this because it already have relatively low Fs, and highish Qts
aiming at closed box, ofcourse

same thing as the PD1550
only difference, the PD186 does it in a closed box
150 liter, -3db/40hz, -6db/30hz
nice

now thinking about how best to ad exstra mass
  Reply With Quote
Old 15th November 2012, 08:14 PM   #14
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
wondered how much 100gramme is
and this is what it is
Attached Images
File Type: jpg IMG_7888.JPG (98.3 KB, 128 views)
  Reply With Quote
Old 25th November 2012, 01:25 PM   #15
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Quote:
Originally Posted by bjorno View Post

Ps:

In another thread we talked about adding cone weight to a PD.1550 and
PD.186 in order to increase the Qts, thus making these speaker drivers to suit HiFi subs:
Ive lost track of the original thread but posting my suggestions here instead.
Very high quality performance can be attained if using driver with exceptional low distortion and quality spider systems like the PD's have by keeping the added cone-weight not exceeding the nominal values.
IMO only rugged drivers (low nominal cone-weights to start with) with known or documented low distortion should be candidates.
Picture#2:
moved from another thread


moderation
Attached Images
File Type: jpg PD.1550_100g-add_PD186_85g-add.jpg (750.4 KB, 106 views)
  Reply With Quote
Old 25th November 2012, 01:29 PM   #16
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
hey, bjorn, did you notice I posted about a new simple software calculating new Fs and Qts specs when adding mass
makes quite a difference, being ably to do it correctly
  Reply With Quote
Old 25th November 2012, 02:02 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 tinitus View Post
hey, bjorn, did you notice I posted about a new simple software calculating new Fs and Qts specs when adding mass
makes quite a difference, being ably to do it correctly
tinitus,

Thank you for moving my picture and text.

Where can I find this software?

b
  Reply With Quote
Old 25th November 2012, 04:30 PM   #18
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
www.mh-audio.nl
  Reply With Quote
Old 25th November 2012, 06:04 PM   #19
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
Quote:
Originally Posted by tinitus View Post
me too
and beat the crap out of it with seriously heavy cone modding/coating
my first subwoofer

hey, back, how did it go with your project ?
i wasn`t following this thread after so match time and i just saw this.i went with jbl gti 1200 car subwoofers.

great bass.
  Reply With Quote
Old 25th November 2012, 06:06 PM   #20
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
maybe we have to continue without you then
  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 09:48 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