Or on planet Earth in general [img]graemlins/laugh.gif[/img]

 

ok if that is all you want to know... 30hz will sound low and deep and travel. people will hear you coming from far away... 50 hz will be still be pretty deep but will be more punchy and hard...will not travel far...and would not reccomend tuning that for a daily driver as alot of rap and hip hop and certain other music plays notes well below that and could cause damage to your sub system

hint ported will be much louder when in your car winows closed and will get a little louder when you open them... sealed will be sort of loud when windows are closed but will appear to have a huge increase in sound when you open the windows


does this clarify better?

 

also dont forget to measure the electro mangenitc field given off by the scalopolical force thurst of the wave lenght in your vehicle.

 

Thanks MTA that is what I was looking for. In my mind I always thought deeper bass would be what gave my better SPL but I guess not!

Thanks Steve

 

Or on planet Earth in general [img]graemlins/laugh.gif[/img] </font>[/QUOTE]are u just saying something for the sack of having imput cause i can prove it repeadedly in mannnnnyyyyyyy vehiles for you!

what do you think is the average frequency of splers at finals! i am not saying you cant hit bigger #'s with lower notes. but just look at what is going on there is probably good reasons for in. not to mention wave development in a car bellow 60hz just doesn't happen. you start dealing with 3/4, 1/2 and 1/4 notes. not nearly as loud as full wave development!

as for your last question biglicks. what most people perseve as loud is that real deep bass extention when your stareo is tunned to play deep (30hz) if that is what you like go nuts. if you tune it high (50hz) then the rang the box will play will be smaller and more focused. this is better for spl and will show a higher # on an rta!

you have a very good vehicle for this theory. hatch backs are great.

as far as lessy you are absolutly right a vehicle with no hatch is very bad to use for spl and my prevous (theory) is not some thing u want to use. but instead some one like you self should use subsonic notes meaning tune you box lowwwwww!

have fun!

 

hatch backs suck for that theory, i have a grand cherokee and a crx and this theor doesnt work in either of the vehicles. acording to this theory in the jeep i should either be burping 32hz or 64hz......and its the loudest at 52hz with ANY box and ANY tuning. same with my other hatch vehicle, the real peak is not even close to what this theory would suggest. and if you start to get into the 3/4 notes and 4/3 notes and all of that then thats not a theory any more, now u are just guessing, at this point you might as well just get a mic and start testing with a ported box.

 

you just said it your self! 52hz is what works best in your veicle not 32hz right! you just sound silly when you argue my point man. 52hz is obviously your natural cabin gain and sub box come together. stop saying stuff that goes against the laws of physics just for the sake of sounding intelegent!

 

u said theory works and i said it didnt and i provided you with an example.......you are the one wrong. that theory only works in cars with walls. this cabin gain stuff is bs unless you are in a wall appliation. cabin gain can be altered easity in every single vehicle.
where do you get this cabin gain theory at 60 hz??

yah 52hz is what works best in my vehicle but what does that have to do with the cabin gain? i'd like to see you apply this cabin gain theorty to two idential vehicles that have completely different peaks.....i have had 2 of the same model jeep grand cherokees and both of them peaked far apart....didnt matter if i used same boxes in both or if i tuned each box to work better in each of the jeeps.

i wasnt clear on what u said there about a sealed box but i have tried it to find the frequency of the vehicle using this theory u speak of. the sealed box had 2 peaks in my jeep, 32 and 60hz......but when i started playing with ported boxes they all peak at 52hz regardless of the tuning as long as the box has a port in it (reasonalbe enough size port, not a small air leak). and even with a ported box i have two peaks 48hz and 52hz both of which produce same spl. care to explain?

 

Also... my peak changes with volume (more power)