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

Multi-Way Conventional loudspeakers with crossovers

Passive line level crossover
Passive line level crossover
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 6th January 2004, 07:33 PM   #1
rulezzz is offline rulezzz  Lithuania
diyAudio Member
Join Date: Jan 2004
Location: not nessesary
Default Passive line level crossover

please go first to this url
i want to know if i try to make Third Order Lowpass crossover C3 and R3 would be calculated by this formula ???:C3=C1/100 ;R3=100*R1 ,or by this C3=C1/20 ;R3=20*R1 ,or there is another formula?and please could you write formula for Fourth Order Lowpass crossover.
  Reply With Quote
Old 6th January 2004, 08:53 PM   #2
sreten is offline sreten  United Kingdom
Join Date: Nov 2003
Location: Brighton UK
Voltage loss with even a second order circuit will be fairly serious.

As shown its effectively cascaded first order filters and cannot
provide any control over Q, its not really a second order circuit.

3rd and 4th order versions will have horrendous voltage
loss and will be nowhere near real 3rd or 4th order filters,
just 3 or 4 cascaded first order filters.

The high pass version can be emulated by manipulating the
input capacitors of the amplifying chain and is a waste of time.

For passive filters higher than 1st order you need some inductors.

  Reply With Quote
Old 7th January 2004, 05:50 AM   #3
rulezzz is offline rulezzz  Lithuania
diyAudio Member
Join Date: Jan 2004
Location: not nessesary
i don't care about loss i can listen without any problems with 100K resistor(connected :Pc>line level passive(R100K) >preamp>amp>speaker)
i just want to know what is the formula?
Bytheway don't know does it control Q but with Second order i could hear less high frequencies than with First..
P.S. could you give me link to crossover with real 3rd and 4th order BUT not active and without INDUCTION...
  Reply With Quote
Old 7th January 2004, 08:45 AM   #4
planet10 is online now planet10  Canada
diyAudio Moderator
planet10's Avatar
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Passive line level crossover
RC PLLXOs are not suitable for anything over 2nd order (and that is pushing it) because they get real droopy (ie really low Q). If you need higher order you need to go to an LC network. And the size of the Ls needed means sourcing them gets tricky.

Marchand is selling kits http://www.marchandelec.com/xm46.htm

community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote


Passive line level crossoverHide 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
Passive line level x-over - CAN IT BE DONE? hasselbaink Multi-Way 35 13th September 2016 01:03 AM
Line level passive BSC rhapsodee Multi-Way 1 27th July 2009 02:09 AM
help with passive line level crossover PLLXO for 33K impedance amps Daveis Analog Line Level 1 14th December 2008 08:12 PM
1st order Passive Line Level Crossover + 2nd order Highpass? alexclaber Multi-Way 11 4th January 2008 07:15 PM
passive line level XO peterr Everything Else 1 5th March 2003 08:07 PM

New To Site? Need Help?

All times are GMT. The time now is 05:05 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio