oh..and genius...by haveing the subs and port facing the same way, u are putting them 180 outa phase..which, in theory, puts them in phase as the back ward motion of the sub pushes the air outa the box at about the same time the sub starts its forward movement...in essence, creating another sub....but u prolly knew that already..
not best buy. this is the box that RF designed not me nitwit. if you purchase their product and call them they would be happy to help you design a box that will not only maximize the efficiency of your woofer but also fit within your space restraints. but you would not know that oreo as you could not afford a nice subwoofer as you obviously still live at home with mommy
ur right again..just one of my treo's cost more then all 4 of ur rf's...but i can't afford...ummm....crutchfield....my bad, what was i thinkin...oh and having to call rf to design a box...why didn't i think of that?!?!
and the woman in the pic..that's my wife....rag on me all ya want, that's cool...but leave her out, that's all i ask. fun is fun, but i won't go there, and i ask you to do the same..thanks
**** you and **** your ugly ass wife. this is fun you are right. you can have it on me all you want, better car, speakers blah blah blah. that ***** is UUUUUUGLY! damn!!!! did you run her over? is she related to the starwars kid?
http://www.ebaumsworld.com/starwarskidv.html
na man cap on me and it's on, **** i'm about to start break dancin'. i aint tryin to stop at some lame limit. you expose a weekness and i'll take it. and to that point i am not really sure about those focals of yours. i mean the sensitivity is only 93 db and you would have to pay a whole lot more than i. so i don't really see where the advantage lies. and man as for the woofer and the port facing the same way. that is realy for the engineers to decide. you would be right about them being out of PHASE if there was just a hole in your box but there's not. you need to use a specific radius and length or it can come out sounding like mud. if anyone want's to build their own box and want's to determine the placement, length and diameter of a port for a specicic woofer i sugest they use
http://www.carstereo.com/help/Articles.cfm
and if they have any trouble with the calculations i would be happy to help, as long as they don't cap on MY old lady
and a sensitivity rating is just that..a rating...the fact is componets always sound better then coaxils due to the fact of nothin in front of the cone to cause cancellation and a round cone is more rigid then a oval one leading to less distortion and hence a better sounding speaker.
and u must not understand what phase means....it has nothing to do with tuning, but how the speakers are firing..ie: timing. u know..if they are working together or firing opposite..together=good..opposite=out of phase=cancellation=no good
but hey..u keep buying from crutchfield...u keep calling rf for help...and i'll out hit ya everytime..and sound better doing it
btw, ur right about one thing..i did spend more on my equipment, but then again, i know what works
and even if my wife is considered ugly...she is still way above anything you'll ever get.
ur not just losers...ur punked losers. tough on the net cuz u were ******* inside.
a sensitivity rating is as you say "just that". it is a rating of the amout of sound that a speaker will produce at a given watage and at a certian distance generaly one watt meter. a speaker with a higher sensitivity rating will produce more sound with the same power. and as for cancelation buddy you need to study sound. sound travles at 1128 ft per sec @ 0% humidity and 68 degrees. in that one second a sound wave will oscillate ,up and down one time, a certain number of times. the number of oscillations is thought as hertz, abbreviated Hz and named after Heinrich Rudolph Hertz (1857-94). so we can now easly determine how long sound wave is, by the way this is really elementry friken math when it comes to sound nim-wit. your lack of knowlage is evidence of your infancy in the school of sound. but anyway @ 10khz that 1128ft is devided by 10,000 and the length of the wave is 0.1158 ft or about an inch and a quarter. at that length cancellation is nearly imposible. but as you know nothing of sound and are so willing to admit you are wrong i suppose i should forgive you.
and as for a ported box being in tune and in phase. god i hate having to explain things you should already know. if a box is tuned, lets say, to 45hz it will only be in phase @ 45hz. @ 50hz it will be slightly out of phase and so on. the further from the "tuned" sound wave we get, the further out of "phase" the sound will become. so you see the two are very much tied together you moron. you don't tune or worry about phase with a single sub in a sealed enclosure but as soon as you add multiple drivers you need to start to worry about phase. when you add a port you have to tune it and thereby make sure the air coming out of the port is "in phase" with the air coming off the cone of your woofer. this you learn when you build an spl setup. it is all very simple, no wonder it escapes you.
i call rf because i can have them design the perfect box for the woofer that they designed. there really is no sense in not.
you are right your wife is ugly, i'm glad you can admit that now. and my wife is a bombshell partner. hahahahaha. if you want to see her i can post a pic, but i hate people who do that so i won't without request.
the cones on these are aluminium. pretty ridgid i'd say
let's see...in a single sub, sealed enviroment, by making the box larger u can lower the freq at which the sub plays and vice versa...kinda like tuning,eh?
and in a shared chamber, u have to make sure the subs are in phase or they will be playing against each other..ie; cancellation
and in a "tuned" enclosure, u port the box; port area and length in concert with box size determines tuning, and depending upon port placement, aligns the port with the subs(if on the same plane) to keep the port and subs in phase..or firing at the same time
we on the same page?
ok, now u say, that with a box tuned at 45hz..that at that freq, the port and sub are in phase? i guess in one definition of the word, u could be correct..except, a box rarely peaks at what it is tuned at due to transeit response of the enviroment. it generally peaks higher, around 8-10hz, so at that peak, in ur definition of the word, wouldn't they be "in phase" then?
i can see the point u are trying to make, but i believe u are using the wrong terminology. however, i could be wrong..just show me proof of what u are trying to define..and i will admit i'm wrong.
and ur tyraid about ur 6x9's not having cancellation...try this. talk with nothing in front of ur mouth to a friend...say 1 meter from u. now, using the same tone and words, try again, only put ur hand 3/4" from ur mouth( or whatever ur mid and tweet measure off ur woofer of ur 6x9) and see which is louder to ur friend. then have him,or her, repeat the same thing to u. it's a crude experiment, but it works and will demonstrate my point about the cancellation issue of coaxials.
wait wait wait. you say you can tune a sealed box but then go on to say that a tuned box is ported? i'm really glad you are not an instructor.and no we're not on the same page. a woofer, tweeter, whatever is designed for a specific frequency range bigger box smaller box. no no no. it needs a specific box whatever it is designed for. you go changing the enclosure and the whole thing is bound to come out sounding like mudd, as i'm sure you are accustomed to
Main Entry: 1tran·sient
Pronunciation: -sh(E-)&nt, -zE-&nt, -sE-; -zh&nt, -j&nt
Function: adjective
Etymology: Latin transeunt-, transiens, present participle of transire to go across, pass, from trans- + ire to go -- more at ISSUE
1 a : passing especially quickly into and out of existence : TRANSITORY b : passing through or by a place with only a brief stay or sojourn
2 : affecting something or producing results beyond itself
- tran·sient·ly adverb
synonyms TRANSIENT, TRANSITORY, EPHEMERAL, MOMENTARY, FUGITIVE, FLEETING, EVANESCENT mean lasting or staying only a short time. TRANSIENT applies to what is actually short in its duration or stay <a hotel catering primarily to transient guests>. TRANSITORY applies to what is by its nature or essence bound to change, pass, or come to an end <fame in the movies is transitory>. EPHEMERAL implies striking brevity of life or duration <many slang words are ephemeral>. MOMENTARY suggests coming and going quickly and therefore being merely a brief interruption of a more enduring state <my feelings of guilt were only momentary>. FUGITIVE and FLEETING imply passing so quickly as to make apprehending difficult <let a fugitive smile flit across his face> <fleeting moments of joy>. EVANESCENT suggests a quick vanishing and an airy or fragile quality <the story has an evanescent touch of whimsy that is lost in translation>.
Main Entry: en·vi·ron·ment
Pronunciation: in-'vI-r&-m&nt, -'vI(-&)r-
Function: noun
1 : the circumstances, objects, or conditions by which one is surrounded
2 a : the complex of physical, chemical, and biotic factors (as climate, soil, and living things) that act upon an organism or an ecological community and ultimately determine its form and survival b : the aggregate of social and cultural conditions that influence the life of an individual or community
3 : the position or characteristic position of a linguistic element in a sequence
the sub should optimally be in a separate sealed enclosure. ported enclosures or exotic multi-chambered boxes are often used for maximum loudness. these types are inherently inaccurate for quality use in a car.
the reason is that the cars interior models as a simple volume for long wavelengths (bass). because of this it can be shown that the pressure response is perfectly flat if a sealed box that would normally roll off at
12 decibels per octave becomes flat to theoretically zero Hz in this chamber formed in the car. exotic resistively damped enclosures not generally covered can provide an over-damped second order response and are also effective. they do the same job as a lower qt woofer in the same size box when fully sealed. once the box size has been mated to the driver or drivers, the only problem is setting the cutoff frequency. in a typical car this is about 66 Hz. in a big van the frequency will be lower, perhaps 50Hz. another nasty problem afflicting virtually all installations is a narrow peak about one octave above this frequency. That would be typically 132 Hz.
this resonance happens because one wavelength of sound just fits in the cars largest dimension and builds on itself. some installers gap the crossover to produce a dip at this frequency. this works but the transient response remains so poor there actually seems to be a hole at this frequency on any music or voice that changes rapidly. slow moving electronic or organ music is only slightly affected. a better way to produce an ideal correction is to drive another set of speakers in the car with this same problem frequency and then cancel the sum by phase interference with the subwoofer. this restores speed to the lower midrange/upper bass where this peak occurs. it allows the bass attack (represented by good transient response at this problem frequency) to remain. the speaker inter-mounting distance phase shifts and delays the cancellation. this both ultimately controls the exaggerated musical sustains at that critical problem frequency with good transient response restored. in short the crossover is tuned to provide a critical amount of destructive interference between spaced speakers. to achieve this the satellite speakers should be capable of keeping up with the sub at this frequency. a very powerful sub played very loud might require this other speaker (probably in a door panel) to be larger than usual or to have an excellent Xmax if it is smaller. when the smaller speaker gives out the bass will become uncontrolled and muddy especially since it is required to destructively interfere. rear seat passengers who are equidistant between interfering speakers will experience a dryer sound. ideally no riders should be equidistant.
