Proof that the HDC3 can get low. (Pics and Vids)

[Brent00F150 10+ year member]

Yeah it would sure be nice to have that front stage but oh well its to cold.

 

[D_Jack 10+ year member]

yeah thats the only thing your lacking right now is.. well highs in general.. lol.. once u get those XRs on that 100.4 ull have plenty..

 

[vehementSPL 10+ year member]

Hey my friend. Although still tuned low ya need to check ya tuning. I ran it by winisd and depending on the length between 16 and 18 it is 30hz tuning and 31.5. Winisd doesn't account for aero but last time I checked that raises the tuning a hair from playing with bassbox a while back. Although still low tuning not in the 20's. I wasn't posting to put it down at all still very impressive score. Just didn't want people to be mislead

 

[Fear Of Theive 10+ year member]

What year f150? I got same truck but 97.

 

[Brent00F150 10+ year member]

What year f150? I got same truck but 97.

its a 2000 F150

 

[Brent00F150 10+ year member]

Hey my friend. Although still tuned low ya need to check ya tuning. I ran it by winisd and depending on the length between 16 and 18 it is 30hz tuning and 31.5. Winisd doesn't account for aero but last time I checked that raises the tuning a hair from playing with bassbox a while back. Although still low tuning not in the 20's. I wasn't posting to put it down at all still very impressive score. Just didn't want people to be mislead

yeah dude i dont know exactly where it is tuned we just started with a base line then we started tweaking until it was the loudest. my truck is the loudest at 30hz

 

[thefordmccord 10+ year member]

Hey my friend. Although still tuned low ya need to check ya tuning. I ran it by winisd and depending on the length between 16 and 18 it is 30hz tuning and 31.5. Winisd doesn't account for aero but last time I checked that raises the tuning a hair from playing with bassbox a while back. Although still low tuning not in the 20's. I wasn't posting to put it down at all still very impressive score. Just didn't want people to be mislead

WINISD is useless when trying to figure aero ports. I have yet to find any online calculator or program that properly models an enclosure that uses aero ports. We just tweaked the port length until we got the loudest score and we ended up peaking at 30Hz. 99% of the time, the tuning is going to be somewhere below the frequency that the enclosure peaks at. Thats why we are guessing that is is tuned somewhere in the high 20s. We are not trying to mislead anyone. We don't realy care what it is tuned at, we just care where it peaks at.

 

[IgnoreMe 5,000+ posts]

WINISD is useless when trying to figure aero ports. I have yet to find any online calculator or program that properly models an enclosure that uses aero ports. We just tweaked the port length until we got the loudest score and we ended up peaking at 30Hz. 99% of the time, the tuning is going to be somewhere below the frequency that the enclosure peaks at. Thats why we are guessing that is is tuned somewhere in the high 20s. We are not trying to mislead anyone. We don't realy care what it is tuned at, we just care where it peaks at.

unless you have a super duper uber flare on your aero port....winisd will work just fine in calculating.

you dont even need to calculate the flare in order to be in the ball park of the tuning by a VERY small margin...

put in volume of the box, and length of the port and how many (after selecting the round port option), and bingo, you have a very very very close calculation of your tuning.

 

[Canaan 10+ year member]

Very nice #'s.

I have a very similar box in the works for my 98 silverado for 2 3515's on 2 20.1's.

~7net w/ 2 6" flares...and I'm also using 3 deka's in the toolbox.

Have you tried loading the ports to the drivers side?

The few times I have played w/ f150's for spl, they did have some nutty peaks. But I only got 144's w/ 2 OLD L5's on a sony ~600wrms amp. That low note is fun in those trucks.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Did you just use stock-length 6" flares?

They come in 17" lengths.

 

[thefordmccord 10+ year member]

unless you have a super duper uber flare on your aero port....winisd will work just fine in calculating.
you dont even need to calculate the flare in order to be in the ball park of the tuning by a VERY small margin...

put in volume of the box, and length of the port and how many (after selecting the round port option), and bingo, you have a very very very close calculation of your tuning.

On paper, or in a program, it might be tuned at 30, but if you had straight 6" ports or a slot port with the same surface area, it will peak at a completely different frequency. The only way to tune aero ports is with a termlab and time. This is just from my personal experience.

 

[Canaan 10+ year member]

Also, nice touch w/ the molding in the corners.

I usually just pour in resin w/ the box leaned up on edge.

 

[IgnoreMe 5,000+ posts]

On paper, or in a program, it might be tuned at 30, but if you had straight 6" ports or a slot port with the same surface area, it will peak at a completely different frequency. The only way to tune aero ports is with a termlab and time. This is just from my personal experience.

well, i think the two of you (hell, even me) are misunderstanding each other.

he is just talking about the box tuning. ie: 7.5^3ft tuned to 32hz (or whatever), during the design and build stage.

you are talking about how the box reacts inside the vehicle and how to "tune" your box, after its built and installed.

if you are saying winisd is worthless for its graphs and figuring out how a box will react, and that you need a TL to really see whats going on, i agree. if you are saying you cant use winisd to figure out the box tuning from the get go, i disagree. seems there is a misunderstanding between all three of us what each one is saying //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[vehementSPL 10+ year member]

WINISD is useless when trying to figure aero ports. I have yet to find any online calculator or program that properly models an enclosure that uses aero ports. We just tweaked the port length until we got the loudest score and we ended up peaking at 30Hz. 99% of the time, the tuning is going to be somewhere below the frequency that the enclosure peaks at. Thats why we are guessing that is is tuned somewhere in the high 20s. We are not trying to mislead anyone. We don't realy care what it is tuned at, we just care where it peaks at.

yeah most of the time. One problem you realize though. Reality notes typically peak a LOT lower than peak output of the box. For example my explorer peaked at 50hz spl and sounded loudest around there. Reality was 42hz. My friend is tuned 39hz in his wall and peaks at 34hz for his reality note

 

[thefordmccord 10+ year member]

well, i think the two of you (hell, even me) are misunderstanding each other.
he is just talking about the box tuning. ie: 7.5^3ft tuned to 32hz (or whatever)

you are talking about how the box reacts inside the vehicle.

if you are saying winisd is worthless for its graphs and figuring out how a box will react, i agree. if you are saying you cant use winisd to figure out the box tuning from the get go, i disagree. seems there is a misunderstanding between all three of us what each one is saying //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

I gotcha. I guess I should have said that WINISD is useless in trying to figure out how the box will perform in the cabin of a vehicle. I just have much better luck with the trial and error method. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[IgnoreMe 5,000+ posts]

I gotcha. I guess I should have said that WINISD is useless in trying to figure out how the box will perform in the cabin of a vehicle. I just have much better luck with the trial and error method. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

thats what i was thinking you were getting at after your last post //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif