aq hdc3 15" in a sealed box

[terra 5,000+ posts]

waaaa

waaa?

i understand. hadnt thought about it like that before. thanks for the perspective change.//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

 

[Andrew12 10+ year member]

Maybe I missed something, but I'm pretty sure the HDC3 15 was built around getting loud.

Yea, you missed it. It's designed to be a loud azz daily driver sub. SQL is the often referred to term. MTX RFL= SPL sub... HDC3= Loud Daily sub

Terra, I would try it out in your personal car first, just to avoid any problems and to verify that it will work before letting her turn loose on the volume knob.

 

[t-money 10+ year member]

so people cant get loud in sealed boxes? im just trying to understand why it wont work in a low power sealed application...if the answer is just completely no then ill have to rebuild the car to allow for more space or something

sealed boxes can get very loud. The reason you want a ported over sealed for that sub is due to the ebp of the driver which is the fs divided by the qes. If that number is closer to 50 that sub is better suited for sealed and if its closer to 100 vented is the way to go(there are exceptions). Now any sub can play in any box. A sealed box is not optimal for the hdc3 but will work none the less. Most guys here want the most from their subs so they go ported however i'm very confident that your friend will be happy with that sub in that sealed box off 900 watts. Hell i've heard L7's(which most recommend ported boxes) in a sealed box and the sub moved a lot of air. Sell her the sub, hook everything up for her and she'll be fine. Are there better subs for her amp and space requirements, for sure. Will the hdc3 put out enough bass for a first system off 900 watts, i say hell yeah. Don't hesitate, hook the girl up.

 

[shortyg83 10+ year member]

Yea, you missed it. It's designed to be a loud azz daily driver sub. SQL is the often referred to term. MTX RFL= SPL sub... HDC3= Loud Daily sub
Terra, I would try it out in your personal car first, just to avoid any problems and to verify that it will work before letting her turn loose on the volume knob.

In my experiance with the 2 subs my HDC3>RFL in SPL.

No its not completly a one note wonder but my BTL sounded alot better. Yea its aimed for daily use but is is an SPL based driver.

 

[terra 5,000+ posts]

sealed boxes can get very loud. The reason you want a ported over sealed for that sub is due to the ebp of the driver which is the fs divided by the qes. If that number is closer to 50 that sub is better suited for sealed and if its closer to 100 vented is the way to go(there are exceptions). Now any sub can play in any box. A sealed box is not optimal for the hdc3 but will work none the less. Most guys here want the most from their subs so they go ported however i'm very confident that your friend will be happy with that sub in that sealed box off 900 watts. Hell i've heard L7's(which most recommend ported boxes) in a sealed box and the sub moved a lot of air. Sell her the sub, hook everything up for her and she'll be fine. Are there better subs for her amp and space requirements, for sure. Will the hdc3 put out enough bass for a first system off 900 watts, i say hell yeah. Don't hesitate, hook the girl up.

annnnd that is the answer ive been looking for. not necessarily because it gives me the go ahead but because he actually has reasons to support his opinion. thanks..

 

[cheeto 10+ year member]

Yea, you missed it. It's designed to be a loud azz daily driver sub. SQL is the often referred to term. MTX RFL= SPL sub... HDC3= Loud Daily sub
Terra, I would try it out in your personal car first, just to avoid any problems and to verify that it will work before letting her turn loose on the volume knob.

That's what I meant by SPL, I was trying to stress the fact that the HDC3 is made much more for loudness than sound quality.

 

[Andrew12 10+ year member]

In my experiance with the 2 subs my HDC3>RFL in SPL. No its not completly a one note wonder but my BTL sounded alot better. Yea its aimed for daily use but is is an SPL based driver.

I see a sundown 1500 in your sig, how much power did you have on your btl?

 

[shortyg83 10+ year member]

I see a sundown 1500 in your sig, how much power did you have on your btl?

2200 watts from a herc xx

 

[wheeler8921 10+ year member]

Look at a 15" SSD from Fi...should work great in 3 cubes sealed, and work well off of 900 watts as well.

Excellent suggestion!

This is what i would do x3984394839489210302909000000000001

 

[wheeler8921 10+ year member]

shorty, what kinda numbers are u hittin in that setup?

 

[terra 5,000+ posts]

/thread

 

[Jeremiah25 10+ year member]

I've played with the original HD3's in small sealed boxes. Never bothered with the new C woofer when I was testing it. It really didn't work good. I cut a hole in the box and stuck an external port on it for comparison purposes, and it worked much better ported although the box was really a little too small.

My advice would be to go ahead an build the box ported. Leave the port a little on the small side, like 12 to 13 in^2 of port per cubic foot of net space, instead of the 16-18 in^2 that is recommended. Also keep the tuning low, like in the 34hz range. It should still sound decent. Not ideal, but it would still be better than a sealed box.

 

[RAM_Designs 5,000+ posts]

EBP of 86

Fs of 38hz

Qts of .42

all of this together screams "put me in a ported box"

 

[crownvic02 10+ year member]

So for cerwin vega strokers my best bet would be sealed cause after I did that lil math the ebp number was 30