How does a crossover work? - Car Audio Classifieds!
Car Audio Classifieds!  

Go Back   Car Audio Classifieds! > Car Audio Help & Discussion > Tutorials & Quick References

Tutorials & Quick References This section is for how-to's and quick references for car audio.


Notices

Closed Thread
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-01-2009, 09:15 AM
No, I'm not dead
 
Activity Longevity
0/20 20/20
Today Posts
0/11 sssss8128
Location: Somewhere in time
Thanks: 0
Thanked 9 Times in 8 Posts
iTrader: (19)
Feedback Score: 19 reviews
Default How does a crossover work?

How does a crossover work? How does it do that thing it does? It's fairly simple really, a passive crossover uses what's known as a filter to prevent certain frequencies from reaching your speakers. Filters are capacitors and chokes. The value of the cap or choke will determine the frequency at which the filter rolls off and those values are as follows: Farads for capacitors (usually given as microfarads) and Henries for chokes (chokes are usually millihenries) named after the people that came up with the concept of measuring the values. A choke is a coil of wire and will filter high frequencies by rolling them off at 6db per octave while a capacitor will filter low frequencies, also rolling them off at 6db per octave.

To make filters that roll off at steeper slopes you simple combine elements. For example, a 12db per octave high pass filter will have a choke that is connected in parallel to the speaker and a capacitor that is connected in series to the speaker. This will shunt the low frequencies back to the amp at 6db per octave via the choke and block the low frequencies also at 6db per octave via the cap. A low pass filter will be comprised of the same elements only hooked up in the reverse order. The choke will be in series to the speaker while the cap will be in parallel.

For even steeper slopes you simply add more elements to the crossover but bear in mind that as you add in elements you'll be changing the values for like elements because multiple similar elements will have an effect on the overall value. For example, two caps in series results in half the capacitance while two caps in parallel will double the capacitance. Two chokes in series will double the value while two in parallel will halve the value. This is, of course, assuming that identical values are used for the chokes or caps.

For designing crossovers I've found that WinISD Beta does a great job for giving you the design you're after along with all the values needed for the core components. You can also use it for designing notch filters which are great for taming any peaks you might encounter.

Have fun and if you have any specific questions feel free to shoot me a PM and I'll do my best to help.
Quick reply to this message
Sponsored Links
Advertisement
 
Closed Thread

Bookmarks

Tags
capacitors, chokes, crossovers, filters

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Car Audio Classifieds! forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Location
Where you live
Level of Car Audio Knowledge
What's your level of car audio?

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Audiocontrol 24xs crossover LudemanDan Head Units, Processors & EQs 0 12-27-2008 06:32 PM
MINI Crossover Concept Patrick Simmons General Automotive Chat 9 11-07-2008 09:21 PM
[SOLD] Kicker x3i Electronic Crossover RidnClean Head Units, Processors & EQs 3 10-16-2008 03:17 PM
My work table :( bumpin buick Off Topic Chat 17 08-05-2008 01:00 PM

» Amps
A/d/s/
Advent
Alphasonik
Alpine
American Bass
ARC Audio
Atomic
Audio Art
Audio Gods
Audiobahn
Audiocontrol
Audiopipe
Audison
Aura
Autotek
Avionixx
Bazooka
Beyma
Blaupunkt
Boss
Boston Acoustics
Bravox
Cadence
Cascade (CAE)
CDT Audio
Cerwin Vega
Clarion
Clif Designs
Concept
Coustic
Critical Mass
Crossfire
Crunch
DB Drive
DC Audio
DC Power
DEI
Denon
Diabolo
Diamond
Digital Designs
Directed
DLS
Dual
DYnamat
Dynaudio
Earthquake
Eclipse
Elemental Designs
ESX
Eton
Farenheit
Fi Car Audio
Fix My Speaker
Focal
Fusion
Genesis
Ground Zero
Hafler
Helix
Hertz
Hifonics
Hushmat
Image Dynamics
Infinity
Interfire
JBL
Jensen
JL Audio
JVC
Kenwood
Kicker
Knu Konceptz
Kole Audio
Kove Audio
Lanzar
Lightning Audio
Linear Power
MA Audio
Magnat
Marantz
Massive Audio
MB Quart
McIntosh
Memphis
Metra
MMATS
Mobile Authority
Morel
MTX
Nakamichi
Niche Audio
O2 Audio
Ohio Generator
Optima
Orion
Oxygen Audio
OZ Audio
PG Audio
Phase Linear
Phoenix Gold
Pioneer
Polk
Power Acoustik
Powerbass
Powermaster
Precision Power
Profile
Pyle
Pyramid
RadioShack
Rainbow
Rampage
RE AUdio
Rockford Fosgate
Scanspeak
Scosche
Seas
Sony
soundstream
Sparkomatic
SPL Dynamics
Stinger
Sundown Audio
Swiss Audio
Targa
TC Sounds
TREO Engineering
TRU
Tsunami
Ultimate
US Acoustics
US Amps
Velodyne
Vifa
Viper
Visonik
Xtant
Zapco
Zed Audio
Powered by vBadvanced CMPS v3.2.3
Links
Amp Guts
amplifier, amp guts, ampguts, car audio classifieds, speakers and subs for sale with listings of 12 volt sound systems. Security systems for sale for aftermarket car audio equipment with amplifier and amps for sale
Car Audio Forum
car audio forum, moble audio, car stereo, wholesale car audio, 12 volt, with, amplifier, amp, subwoofer, sound quality, buy car audio, and sell automotive stereo systems for cars
Car Audio Sound Quality Forum
Sound QUality science based car audio forum, amplifier, subs and speaker design, fabrication help, sound systems forum, aftermarket car audio website for sound quality.
Car Stereo Forum
DIYMA car audio stereo forum for 12 volt car audio subwoofer and amplifier systems that have sound quality with wholesale car audio products.


All times are GMT -5. The time now is 03:25 AM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.