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

[thefordmccord 10+ year member]

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

Interesting. I don't think that I have ever ran into that. I know that all of the slot boxes that I have built peaked anywhere 5 to 10 hz above tuning, it just depends on the size of the box. I have built a few very large ported boxes that would peak right at tuning. All of us Carlisle guys are new to the comp thing, so we are still learning.

 

[Brent00F150 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.

Thanks,

I might turn the box around for drive-by but it just depends on what makes the biggest difference.

 

[IgnoreMe 5,000+ posts]

Interesting. I don't think that I have ever ran into that. I know that all of the slot boxes that I have built peaked anywhere 5 to 10 hz above tuning, it just depends on the size of the box. I have built a few very large ported boxes that would peak right at tuning. All of us Carlisle guys are new to the comp thing, so we are still learning.

that is usually the case from everything i have seen. although, i know ngsm13 built a huge ported box for 2 1st gen magnums in his truck and tuned pretty low, and they still peaked quite a bit under tuning:crazy:

 

[Brent00F150 10+ year member]

Nice. Good job bro, i got a 12 sitting here waiting to get power.

you will be impressed with the 12" they are loud. thefordmccord has a 10 doing 141's with a sundown 1500D on it. so they get really loud.

 

[Brent00F150 10+ year member]

ttt

 

[Decado2 10+ year member]

Nice score man //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[tapout 5,000+ posts]

I can dig it.

 

[Immacomputer 10+ year member]

Where you peak on a mic has just as much to do with the vehicle as the enclosure. It's very possible to peak below the tuning frequency. The tuning frequency isn't always the peak output point for an enclosure either. If you go with a bigger enclosure, you will lower the resonance point of the driver in that enclosure to where is approaches the Fs of the driver. Going smaller will increase that resonance point and can bring it very high. You can see this when people make enclosures tuned from 35-45hz and the numbers on a mic don't change too much as long as the enclosure volume is the same.

 

[cheapaudio 10+ year member]

how would 2 12" HDC3's or 4 10" HDC3's compare to 2 FI BL 15's

 

[Brent00F150 10+ year member]

Nice score man //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I can dig it.

thanks.

 

[Jeremiah25 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.

WinIsd has a correction factor that should for aeroports. Most people don't understand it or know about it. If you click on the vents tab there is a box called end correction. For aeroports it should be set to flanged on both ends. This will give you closer results when calculating a box with aeroports.