Port walls?

[PV Audio 5,000+ posts]

as for the only thing i agree on is the single port with internal bracing, unless you are going for the stereo effect. (left and right) from double bass

Are you trolling us? Because I don't have time to sit here with you as I need to study for an exam, but I don't want this guy getting wrong information. There is no "stereo" effect from bass frequencies. None. It's omni directional which is why you can place a subwoofer anywhere in your room or trunk and not be able to tell where it is.

 

[sub-FATHER 10+ year member]

That is entirely dependent on the enclosure and the speaker. The subwoofer I have in my apartment is tuned to 19hz. It has more output below 30hz than it does above 40 due to the way the enclosure controls the cone's motion. If your speaker is not designed to play in a higher frequency range and if your enclosure is optimized to have maximum output in the lower octaves, then your fact falls on its face. Again, please stop posting vague rules of thumb as facts because there are so many exceptions to the rule to every one of them.

we are talking car audio not home audio. the guy wants to hear the lower ends of music. its a simple fix and your ranting on about nothing.

 

[sub-FATHER 10+ year member]

Are you trolling us? Because I don't have time to sit here with you as I need to study for an exam, but I don't want this guy getting wrong information. There is no "stereo" effect from bass frequencies. None. It's omni directional which is why you can place a subwoofer anywhere in your room or trunk and not be able to tell where it is.

so i suppose the guy cant hook up his subs left and right and expect to hear on the left channel if thats how the music is recorded. your a fool.

just like your mids and highs are in stereo, the subs can also be in stereo

and believe it or not music is recorded in stereo as well.

so i hope the guy whos post this is understands im giving him the simple solution. and with that i will leave as i came.

 

[DNick454 10+ year member]

Increasing port length makes the box's F3 lower. That's it. To actually HIT those notes with control and accuracy, you need a subwoofer with supporting characteristics of that kind of box.

Same reason certain subs are meant for sealed and others ported. You can't force a sub to reproduce what it is not meant to handle. Well, you can force it actually, good luck getting something audible though.

 

[PV Audio 5,000+ posts]

we are talking car audio not home audio. the guy wants to hear the lower ends of music. its a simple fix and your ranting on about nothing.

I don't think anyone else has ever made me so frustrated as you do, because you clearly know NOTHING and end up hurting the knowledge of newer members who are trying to learn. Go away because you are just making it harder to remove useless snake oil myths and misconceptions.

 

[DNick454 10+ year member]

so i suppose the guy cant hook up his subs left and right and expect to hear on the left channel if thats how the music is recorded. your a fool.
just like your mids and highs are in stereo, the subs can also be in stereo

and believe it or not music is recorded in stereo as well.

so i hope the guy whos post this is understands im giving him the simple solution. and with that i will leave as i came.

Actually, YES. That's exactly true. Unless they are physically right next to your head

Tones under a certain frequency are unable to be perceived by the human ear as far as location goes. Why else would we mount them in the trunk? Shit ton of room. If you can hear left and right channels, why don't the SQ guys put subs in their door panels on axis with the listener?

 

[PV Audio 5,000+ posts]

so i suppose the guy cant hook up his subs left and right and expect to hear on the left channel if thats how the music is recorded. your a fool.
just like your mids and highs are in stereo, the subs can also be in stereo

and believe it or not music is recorded in stereo as well.

so i hope the guy whos post this is understands im giving him the simple solution. and with that i will leave as i came.

NO, you won't because sub bass is NOT directional. It is NOT DIRECTIONAL. Why? Because sound radiates from your speaker in a spherical pattern. Depending on the size of your enclosure and the wave length being played, that means that the radiation can either fully envelop your enclosure or not. What that means is that for very high frequencies, all the sound is reflected off of the baffle and out into the listening area. For enclosures whose baffles are the same width as the wavelength being played, this causes diffraction known as baffle step. For sub bass frequencies, the wave lengths are so long that by the time the information reaches the listening, there is longer any directionality to the sound because it is propagating in a spherical pattern without interference from the baffle. This is the theory behind infinite baffle setups: if your baffle is larger than the lowest frequency that you'll be playing's wavelength, all sound is reflected into the listening area. Sub bass frequencies have wave lengths of many FEET, not inches like midranges and tweeters, so it is impossible to localize anything with frequencies that low. Couple that with the fact that the ear doesn't have sensitivity to pick up low frequency directivity and you get a double shot dose of why your theory fails.

 

[slam 5,000+ posts]

Actually, YES. That's exactly true. Unless they are physically right next to your headTones under a certain frequency are unable to be perceived by the human ear as far as location goes. Why else would we mount them in the trunk? Shit ton of room. If you can hear left and right channels, why don't the SQ guys put subs in their door panels on axis with the listener?

I haz 8" subs in the doors //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[sub-FATHER 10+ year member]

Actually, YES. That's exactly true. Unless they are physically right next to your headTones under a certain frequency are unable to be perceived by the human ear as far as location goes. Why else would we mount them in the trunk? Shit ton of room. If you can hear left and right channels, why don't the SQ guys put subs in their door panels on axis with the listener?

because their system is running fullrange or everything is competely crossed over so it sounds that way. either way sq guys go for the left and right seperation of sound. period.

 

[DNick454 10+ year member]

I haz 8" subs in the doors //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

But what frequency are they crossed over at? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[godhatescivics 10+ year member]

QUOTE=sub2weeker;6746464]so i suppose the guy cant hook up his subs left and right and expect to hear on the left channel if thats how the music is recorded. your a fool.

just like your mids and highs are in stereo, the subs can also be in stereo

and believe it or not music is recorded in stereo as well.

so i hope the guy whos post this is understands im giving him the simple solution. and with that i will leave as i came.

FAIL!

 

[DNick454 10+ year member]

because their system is running fullrange or everything is competely crossed over so it sounds that way. either way sq guys go for the left and right seperation of sound. period.

No it's because low tones have frequency waves that are 10-30 feet long and take a long distance to develop. By the time it has reached your ear, it has reflected inside your car cabin so many times that it sounds like it's coming from everywhere.

Do you have another retarded theory for me to disprove?

 

[sub-FATHER 10+ year member]

No it's because low tones have frequency waves that are 10-30 feet long and take a long distance to develop. By the time it has reached your ear,
Do you have another retarded theory for me to disprove?

yeah explain how i have 10 to 30 feet from my wall of 4 18s, that sit directly behind my driver and passenger seats. and why i hit a 155.2 on the glass?

i guess that just isnt possible now is it. heres your sign

 

[sub-FATHER 10+ year member]

No it's because low tones have frequency waves that are 10-30 feet long and take a long distance to develop. By the time it has reached your ear,
Do you have another retarded theory for me to disprove?

yeah explain how i have 10 to 30 feet from my wall of 4 18s, that sit directly behind my driver and passenger seats. and why i hit a 155.2 on the glass?

i guess that just isnt possible now is it. heres your sign/SIZE]

 

[PV Audio 5,000+ posts]

No it's because low tones have frequency waves that are 10-30 feet long and take a long distance to develop. By the time it has reached your ear, it has reflected inside your car cabin so many times that it sounds like it's coming from everywhere.
Do you have another retarded theory for me to disprove?

Jesus Christ, thank you. A 20hz wave has a wavelength of 17 METERS, and as such, that puppy is going out and with nothing to reflect it back towards the listener except for walls, you lose all sense of direction. Think about this: if you're at the shore on the beach, the waves crashing at you have a pretty regular frequency. When you're further out, you don't notice it because literally the wave length is so much longer.