Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Open baffle step compensation on fullrange adds distortion
Open baffle step compensation on fullrange adds distortion
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 2nd July 2020, 09:16 AM   #11
Juhazi is offline Juhazi  Finland
diyAudio Member
Juhazi's Avatar
Join Date: Mar 2007
Location: Jyväskylä
Yes that type of coil is not suitable for crossovers.

Anyway the real problem to my understanding is that a small driver is asked to produce low frequencies as dipole.

Baffle step (or actually loss) compensation with a serial coil is 1st order lowpass by nature and it will attenuate mid and high frequency (sensitivity) When the driver is asked to put out "normal" spl fullrange , it is driver to extreme excursion in bass-low mid very easily.

This is main reason why dipole speakers must be at least 2-way with large bass driver(s)

Rudolf Finke's homepage Dipolplus - Alles über offene Schallwände
Radikal aktivist AINOgradient speaker project

Last edited by Juhazi; 2nd July 2020 at 09:39 AM.
  Reply With Quote
Old 2nd July 2020, 02:26 PM   #12
flo777 is offline flo777  Canada
diyAudio Member
Join Date: Jun 2018
Thanks perceval, for confirming that these inductors are in fact problematic.
And thanks Juhazi, for bringing up the issue of driver excursion.
The distortion I heard was very similar to voice coil rubbing.

I hope that this won't be the case with good inductors, especially since the drivers are 1 m away from me and I won't be listening at loud volumes.

These drivers were also used in OB using a similar crossover (10 ohm and 2mH, instead of 12 ohm and 3.3mH)
OB-5’s | Parts Express Project Gallery

For 4 ohm drivers, I found that this 1st order low pass is 193 Hz for 3.3mH inductor and 318 Hz for 2mH inductor.
Maybe the high/mid attenuation is more due to the 12 ohm resistor instead of 10 ohm, but can it make such a difference to create excursion issues?


Open baffle step compensation on fullrange adds distortionHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Baffle step compensation.. how important is it? nannoo Multi-Way 64 17th March 2014 04:23 PM
When to use baffle step compensation? tmblack Multi-Way 28 6th December 2008 12:39 PM
Short TL as Baffle Step Compensation m@ Multi-Way 0 10th March 2008 09:07 AM
Baffle step compensation formula? bart_dood Full Range 4 8th July 2006 10:50 AM
Baffle Step Compensation Khron Multi-Way 4 16th April 2006 08:23 PM

New To Site? Need Help?

All times are GMT. The time now is 03:49 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio