Martin Logan Monolith bass fix - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Planars & Exotics ESL's, planars, and alternative technologies

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
Thread Tools Search this Thread
Old 4th November 2004, 09:25 AM   #1
diyAudio Member
georgehifi's Avatar
Join Date: Sep 2003
Location: Manly Australia (Jewel of the Pacific)
Send a message via MSN to georgehifi
Default Martin Logan Monolith bass fix

Post #2
It`s done a friend helped me measure the resonant peak, which was about 4-5db at 80hz. The LCR network to get this flat is 18mh in series with 900uf in series with 5.6ohm across the bass speaker, in the Monolith`s case it`s easy to fit outside as the xover is outside the box.
These values for the LCR are for my speakers which are 100% stuffed this may vary from the standard which is only 30% stuffed.
Anyhow the bass is now tight smooth and dynamic, much different to the standard one note bass the the Monoliths had.
One day i may do the standard measurements, but i like the detailed tight sound of an overdamped, low Q bass, it suits my not so large listening room.

Note: Values are the same for factory standard stuffing as well.

Martin Logan Monolith III bass fix?

Cheers george
Avatar : Production Lightspeed Attenuator
  Reply With Quote
Old 9th September 2010, 03:46 PM   #2
diyAudio Member
Join Date: Aug 2010
Default Inductor Coil Upgrade - LCR filter impact

I am considering the replacement of the 10 mh inductor that is in series with the 12" woofers in my ML ReQuest speakers with a low DC resistance 10 mh toroidial iron core one. I measured 1.4 ohms on the stock coils and the spec on the new ones I'm considering is 0.1 ohms. I'm thing this could drastically improve the tranisent response and improve the blend with the panels. It would be kind of like going from 200 feet of 20 gauge wire to 10 feet of 12 gauge speaker cable.

However I think the existing LCR network would be completely wrong for the new alignment and should either be redesigned or eliminated. Since I don't know how to design a proper LCR network I'd have to hope that the transient response is so greatly improved (total Q 0.7 or lower) so no response peak would be present.

I'm thinking of trying to measure the woofer parameters to be able to make some sort of prediction on this. I haven't done that in a long time.
  Reply With Quote


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
Replacement woofers for Martin Logan Monolith II's horchem1972 Planars & Exotics 11 4th October 2008 06:52 PM
Martin Logan Monolith woofer questions horchem1972 Planars & Exotics 0 10th August 2008 06:36 AM
Martin Logan Monolith III dsrviola Planars & Exotics 7 17th September 2007 08:16 PM
More open and dynamic sound mod for Martin Logan Monolith III georgehifi Planars & Exotics 0 23rd December 2005 12:01 PM
Martin Logan Monolith III bass fix? georgehifi Multi-Way 11 13th May 2005 02:32 AM

New To Site? Need Help?

All times are GMT. The time now is 09:41 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2