PDA

View Full Version : Subwoofer cancellation ?



Varinabassing
03-13-2013, 08:38 PM
Ok this might be a very stupid question...

I have 5 12 in subwoofers and 58ins across the front of my box i cant put all 5 on the front...

I was thinking of firing 4 forward and 1 up would this hurt anything ?

n8skow
03-14-2013, 11:30 AM
'Hurt' anything, not likely - so long as your amp is able to handle whatever impedance load it would put you at.
Your probably not going to get much performance added from that fifth woofer (firing up) versus the four firing forward though.

Is there a reason you'd want to use all 5?

rebelfromva
03-14-2013, 11:32 AM
Ok this might be a very stupid question...

I have 5 12 in subwoofers and 58ins across the front of my box i cant put all 5 on the front...

I was thinking of firing 4 forward and 1 up would this hurt anything ?

Welcome back

timhof13
03-14-2013, 11:37 AM
You can fit them, you could have three facing forward with the other two angled. It could look pretty nice, impedance would be my concern also!

Chriszle
03-14-2013, 11:57 AM
Or stagger them if you have the height.

Beatin'
03-14-2013, 12:00 PM
3 facing one side, the other 2 facing opposite side and wired out of phase.

n8skow
03-14-2013, 12:37 PM
Out of phase is gonna kill the output...

mklett33
03-14-2013, 02:03 PM
Whats it going in?

Full Tilt
03-14-2013, 02:33 PM
Is there any surface of the enclosure that you could fit them all?

ciaonzo
03-14-2013, 02:57 PM
You will be fine to put one facing up. It won't look very good but you will not have major phase issues and it could possibly smooth out response.

Varinabassing
03-14-2013, 06:17 PM
Not worried about load 5 single 4 ohm alpines just wanting to see what I can get done with some cheapies only giving like 300 a piece if that from a mb quarts 1500.1 just was worried about placement but I can go wider if I want... Going in a dodge ram 1500 quad cab with no rear seats...

Varinabassing
03-14-2013, 06:18 PM
Welcome back

Thanks got the bug again and it's warming up now too... Much nicer to work on this stuff when it's warm out

rebelfromva
03-14-2013, 07:26 PM
Thanks got the bug again and it's warming up now too... Much nicer to work on this stuff when it's warm out

Message me your number. Don't have it anymore. I'm always down to help out.

Beatin'
03-16-2013, 12:04 AM
Out of phase is gonna kill the output...

I thought the out of phase sub will reinforce the sound waves being produced by the other sub? kind of like a passive radiator???

n8skow
03-16-2013, 12:18 AM
Passive radiators will at best resonate 270 degress out of phase of the woofers (at tuning), reinforcing the woofer output (like a port).
Out of phase woofers will fire 180 degress out of phase regardless of frequency, causing cancellation across the spectrum.

Some good info on PR's over here:
http://www.aespeakers.com/PRFAQ.php



I thought the out of phase sub will reinforce the sound waves being produced by the other sub? kind of like a passive radiator???