Author Topic: Active x-over set point for beginner (Read 2051 times)

kevyeoh · « **on:** November 22, 2006, 12:06:52 AM »

guys,

about to move to active setup...so for a start...what crossover point i should be using?
Tweeter, mids, midbass, and sub...

2-way:

3-way:

thanks...

cbkhoon · « **Reply #1 on:** November 22, 2006, 01:07:45 AM »

i think you have to refer to the frequency response ability of your driver also before you set them beyond the limit & blow them.

I mean especially the tweeter

fooyc · « **Reply #2 on:** November 22, 2006, 08:24:35 AM »

Read your speaker driver manual.

Start setting the frequency from there. Progress from there is the safest bet.

netken · « **Reply #3 on:** November 22, 2006, 10:26:30 AM »

kev, maybe u can state what speakers u have or have in mind, and we will try to find the x.over points for u ...

Zenn · « **Reply #4 on:** November 22, 2006, 11:24:20 AM »

in general:

3 way active system (6.5" mids): sub (<60) mids (50-2500) tweets (>2500)

4 way active (6.5 midbass, 4" midrange): sub (<60) midbs (50-250) midrg (250-5000) twt (>5000), of coz both midrange tweeter highpass is very driver dependant, cant go too low..

ahmisuhairi · « **Reply #5 on:** November 30, 2006, 11:59:01 AM »

6.6inch driver will start to beam at 2.5kHz to 3+kHz, the smaller driver could go higher frequency before start to beam... but this is only in general. pls take a look at the frequency charts to know when the frequency will start to drop

kevyeoh · « **Reply #6 on:** December 07, 2006, 09:12:01 PM »

when you say beam...means what?

burn?

ahmisuhairi · « **Reply #7 on:** December 11, 2006, 02:57:53 PM »

The sound listening infront of speaker and 30 degree out from speaker would make you get different listening.

iceless · « **Reply #8 on:** December 12, 2006, 03:47:30 PM »

Quote from: ahmisuhairi on December 11, 2006, 02:57:53 PM

The sound listening infront of speaker and 30 degree out from speaker would make you get different listening.

Bro,

In english please.... I'm lost.

thank you.

iceless.

hksp · « **Reply #9 on:** December 12, 2006, 04:12:28 PM »

beam = sound become directional, bad for offaxis

kevyeoh · « **Reply #10 on:** December 15, 2006, 09:06:34 PM »

btw...up to this day...i'm still confused about on axis and off axis term...lets get this straight for once...at least for me...

lets say when tweeter placed at A pillar and both tweeter directly facing each other... called on or off axis?

then when say 30deg, means when the tweets facing each other... it's 0deg? then 30deg means 30deg angle towards listener from 0deg?

Zenn · « **Reply #11 on:** December 15, 2006, 09:10:53 PM »

easy...if something is facing u directly, that is on axis or 0 degrees. for tweets in a pillars facing each other, that is 90 degree off axis. so when its 30 deg. its just slightly facing away from u. the axis is between u and the object, not object to object.

kevyeoh · « **Reply #12 on:** December 20, 2006, 03:29:42 PM »

ok...roughly got the idea....

but lets say...tweeter on passenger side aiming directly at driver... that is 0deg... on axis lor...
so for that passenger tweeter...if we aim it towards the driver side tweeter directly...it's not really 90deg ma right?

but as a general reference, we just say 90deg off axis la right?

hksp · « **Reply #13 on:** December 21, 2006, 04:11:46 AM »

generally not inline with driver is off-axis

built · « **Reply #14 on:** December 21, 2006, 01:30:51 PM »

can we now say on-axis means...
drivers at mounted doors facing each other
and tweeters are on a-pillar also facing each
other?

in general, what is the allowable off-axis deg
for tweeters?

hksp · « **Reply #15 on:** December 21, 2006, 08:03:12 PM »

noooo

on-axis means drivers facing u straight up in the face, any place beside that is offaxis

allowable offaxis deg of tweeters depends on itself

built · « **Reply #16 on:** December 21, 2006, 08:51:58 PM »

in another word, drivers are normally
installed off-axis lo...

so, how do you term...
drivers mounted at door and tweeters
on a-pillar facing, all facing each other?

kevyeoh · « **Reply #17 on:** December 23, 2006, 11:22:49 AM »

see? i know sure got mixed up on this term cause i think different ppl that i talk to got different understanding...

my understanding for now remain as...speaker facing you means on axis...not speaker facing each other...

iceless · « **Reply #18 on:** December 23, 2006, 11:29:14 AM »

Quote from: kevyeoh on December 23, 2006, 11:22:49 AM

my understanding for now remain as...speaker facing you means on axis...not speaker facing each other...

kev,

yes you're right!

Anyway, let's not get off-topic here.... hehe

Oldskolboyz · « **Reply #19 on:** January 06, 2007, 10:42:04 AM »

Usually crossover point depend on the driver itself... like Freq Response, Power required vs Slope, just based on my exp loorr..

a) Freq Resp, mean the lower freq driver can play/receive
b) Pwr vs Slope, if the driver state 75wrms 89db >60hz, it doesnt mean U can set at 60hz (HP) slope >12db when U pwr it with >125wrms coz the driver still receive freq <60hz at <12db slope with pwr remain >125wrms.. maybe slope at 10db 50hz/>125wrs, 8db 40hz/>125wrms... this happen when I try pwr up my mid with 150wrms even mid state 40hz-4khz 100wrms (norminal pwr), the lowers I can cut it at >80hz..