This crossover thingy is most important if your speakers are not full range, and a sub is needed to do the low frequencies.

How is this possible? We put the speakers all around us, shouldn't the speakers be directional?

Yes, for frequencies higher than 80Hz (according to THX). Frequencies lower than that are not directional, so it can be taken to the sub instead. You won't hear those low frequencies coming from any speakers, if you set the phase right. Crossing it higher will only make the sub as directional, meaning our ears can pinpoint the location of the sub. That's not right because that frequencies are supposed to come from the directional speakers, not the sub.

So why we want to cross those low frequencies over to the sub? It's because most speakers, especially surrounds, can only go down to a certain frequencies only. Some of the speakers the lowest frequency they can only do 80 Hz, so if there's 50Hz signal being sent, you won't hear it, so you're not listening as the filmmaker intended. It could also hurt the speakers actually.

But what if you have a true full range speakers (can go down to 20Hz, or at least 30Hz)? Then, you don't even need a sub anymore. Just let the speakers do all the job! Though some would still use a sub, just to get more power to the low frequencies.

PS: The AVR bass management will only do this crossover for small speakers, so if you're speakers are not truely full range, set it to small. If set large, the AVR will assume your speakers can do all the frequencies.

This post has been edited by aiman04: Aug 14 2008, 09:11 AM

huh.. ok more lost.. but now i know i need it, so.. how do i crossover?? is it software or hardware wiring? how?? behind my speaker only got 2 red and 2 black input.. where to set crossover?

diamond 9.1 (bookshelf) and 9.4 (floorstanders) are small right and need to crossover?

btw, my 9.4, i can hear 30 Hz Tone sound from "http://www.eminent-tech.com/music/multimediatest.html" test..

shpecs from warffy site

if not, would it be bad if i just get new fronts and use this 9.4 as SL/SR speakers?

This post has been edited by callmevil: Aug 14 2008, 10:52 AM

Dude...you set the crossover at your amp setting. Read your manual. No need to mess up at the back of your amp

For example my speakers:

Front: 55–21,000 Hz
Center: 62-21,000 Hz
Surround: 65-21,000 Hz

So I set my crossover at 80hz and all my speakers to small so any frequency below that will go to my sub. I can also set my crossover at 60hz since my speakers can support that but that will stress them to their limit.

You can set your 9.4 to large if u want it to also handle those frequency below your crossover setting but why do you want to do that if you have a sub? A sub is meant to very efficiently handle those low frequency so let it do its job

I learnt a lot this morning. Thank you guys.

Wahh... Thanks mate. Been googling to try to understand what crossovers mean in laymen terms. All I found is this technical terms which is more difficult to understand.
Noob here by the way. Been reading reviews and forum to start my HT sometimes this year.

thought there was also an analog crossover behind the subwoofers?? pls excuse me if i'm wrong.. another noob here but hopefully will grow up once i get my set this weekend

hah thx for much.. as im sure that should answer my question.. i am just too n00b to understand it.. haha but nvm later when i reach home i will read my manual 9 9 lol, if lost i post here again..

Set the crossover at your sub to max. Meaning...if the knob is from 40-200Hz, set it to 200Hz. Let the amp do the job coz if the amp has been set to crossover at 80Hz then your sub will only receive 80Hz and below even you set the sub at 200Hz. So no harm.

ic.... so is there any advantage in setting at amp level instead of at sub level? or either way is fine? excuse me again for noob question

Only to make your life easier la. If you set both at 80Hz then later if u change amp to 100Hz you also need to change sub to 100Hz. If you forgot to change sub to 100Hz meaning you will loose frequency between 80 and 100Hz. So just set the sub at max and make adjustment with your amp.

got it... thanks dude

can anyone comment if i use the wharffy 9.4 as SL/SR speakers? ill get a pair of 9.6 for fronts if so..

I don't see any problem doing that. Even my surround speakers now actually bookshelf meant for front channel. I kept thinking by using them as surround will never actually fully utilize them but I hope it will change when I got my BD player

I don't recommend doing that. Always set at maximum or direct/bypass.

If you set at the sub at 80Hz, but at the AVR at 100Hz, there'll be a 20Hz gap that non of your speakers or sub are producing. In other words, you'll not hear anything from 80-100Hz frequencies.

Easy to understand, your AVR will send everything below 100Hz, but your sub will reject everything above 80Hz.

This post has been edited by aiman04: Aug 14 2008, 02:15 PM

Door to door $660 Bax Quote Number 3577047

Door to airport $380 Bax Quote Number 3577034

shipment cost of my woofer.. waaahhh howwww lol

If I were you I'd choose door to door. The thing is frickin' huge! Then there might be some customs paperwork involved as well. I'd rather pay extra for the convinience of having somebody handling everything then have it delivered to my doorstep

usd wor~ haha damnit.. there goes my budget for the SPL meter. LoL ok now i hope that the only extra cost would be the tax.. and no other administrative cost.. ahaha

Yup. After adding everything, just over US$2k is not too shabby for the Ultra

how i wish they allowed me to get the ultra.. maybe i shouldve lied about my room size.. hahaa

how come so much difference between door to door and door to airport.