Need help on Polk LSi25 cabinet mod - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 24th January 2013, 09:04 PM   #11
soniky is offline soniky  United States
diyAudio Member
 
Join Date: Jan 2013
Here's the pics of the speaker and external XO. I have no doubt of the XO mod, but maybe there is some inherent cabinet issue with the speaker?
Attached Images
File Type: jpg IMG_4235.jpg (400.9 KB, 46 views)
File Type: jpg IMG_4253.jpg (343.9 KB, 47 views)
  Reply With Quote
Old 25th January 2013, 06:57 AM   #12
Face is offline Face  United States
diyAudio Member
 
Face's Avatar
 
Join Date: May 2007
Can you experiment with speaker placement first?

You can also experiment with various amounts of denim insulation or polyfill in the top cabinet.

One last thing, experiment with your sub. A bottom end that's too hot can have a negative effect on the rest of the speaker.
__________________
"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
  Reply With Quote
Old 25th January 2013, 02:19 PM   #13
soniky is offline soniky  United States
diyAudio Member
 
Join Date: Jan 2013
Face... thanks for your reply.
I have Blackhole5 that I've prepared for this purpose. Is there some common sense practice of areas that I should try, or avoid, i.e. top, bottom, sides, back of the drivers, etc.? I've heard people say do it all around but I am not sure. I understand my placement could be an issue as well but there is not much flexibility besides changing toe in.
  Reply With Quote
Old 25th January 2013, 07:42 PM   #14
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
Quote:
Originally Posted by soniky View Post
It's a professional mod.
Call it DIY. Why professional?
  Reply With Quote
Old 25th January 2013, 10:01 PM   #15
soniky is offline soniky  United States
diyAudio Member
 
Join Date: Jan 2013
Quote:
Originally Posted by Inductor View Post
Call it DIY. Why professional?
We can call it DIY, but I paid for it.
  Reply With Quote
Old 29th January 2013, 08:45 PM   #16
soniky is offline soniky  United States
diyAudio Member
 
Join Date: Jan 2013
I discovered that the lower driver is about 20db lower in volume than the upper driver. Does anyone know if this is typical in this 3way design?

I understand the upper driver is crossed from 80hz to 2.4khz and lower driver from 80hz to 800hz but I am surprised by such a volume difference. It doesn't seem to matter no matter what I play.
  Reply With Quote
Old 29th January 2013, 08:47 PM   #17
Face is offline Face  United States
diyAudio Member
 
Face's Avatar
 
Join Date: May 2007
What frequency did you measure this?

You realize it's a 3.5 way, not 3.

Sent from my DROID3 using Tapatalk 2
__________________
"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
  Reply With Quote
Old 29th January 2013, 09:28 PM   #18
soniky is offline soniky  United States
diyAudio Member
 
Join Date: Jan 2013
Well, I didn't do any measurements. I listened to the same music at -20db and then I unplugged all the other drivers except for the lower one and listened again. However, I found that I need to turn up the volume to 0db in order to be roughly as loud as the first time. I played a piano piece which covered all high to low ranges and then a particular pipe organ piece that's very low in freq. That's why I say roughly a 20db difference but it could be more based on my ear. I have a regular mic which I think I can use with a freq response analysis software for measurement if that's needed.

Forgot to ask, why it's a 3.5 way?

Last edited by soniky; 29th January 2013 at 09:30 PM.
  Reply With Quote
Old 26th February 2013, 01:48 PM   #19
nrg2009 is offline nrg2009  United States
diyAudio Member
 
Join Date: Apr 2009
Location: Detroit, born and raised in the netherlands.
great posts! I was thinking of getting these speakers.. It's hard to build speakers yourself that look this good (sound is another story)..
  Reply With Quote
Old 26th February 2013, 10:39 PM   #20
soniky is offline soniky  United States
diyAudio Member
 
Join Date: Jan 2013
They surely look good. Sound good too but I just wanted more.
  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
Pair Monacor SP-60/4 in a stuffed port aperiodic cabinet? What size cabinet? danielwritesbac Multi-Way 28 3rd April 2013 05:15 AM
Odd subwoofer cabinet question... semi open baffle.. a kitchen cabinet peace brainerd Subwoofers 8 30th November 2012 06:15 PM
Spherical Cabinet vs. ordinary Cuboid Cabinet for full range Speakers tiefbassuebertr Full Range 1 10th January 2012 04:49 PM
Polk RT3 mod ChestofFur Multi-Way 4 21st December 2011 01:21 PM
Polk Sub ??????? ralph-bway Subwoofers 1 20th October 2005 12:39 AM


New To Site? Need Help?

All times are GMT. The time now is 07:26 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