From 1 18 to 2 18's

[Dangrebel 89]

Wassup everybody?! I am going to add another 18 in my gmc Sierra Ext cab and I am wondering what is the best port placement for this setup? Also they are aq hdc3 18's and it will be around a 13 or 14 cube box@ 30hz my goals are a daily ground pounder that's loud as all get out, I may start going to comps

[Duran 387]

Why 30 Hz?

[BanginGMC 23]

Subs forward, port up. Subs up, port up.

May want to consider tuning higher if you want to get serious about competing.

[Kanaworm$ 292]

AQ recommends a 40hz tuning!

[User 1]

Subs forward, port up. Subs up, port up.

May want to consider tuning higher if you want to get serious about competing.

x2 aq's arent a good choice for daily they like power and high tuning. and for competing i would recommend tuning higher. not going to get too loud that low

[inkfx 3]

The subs will be fine for daily use. I also recommend tuning higher with those woofers. I had 2 AQs tuned around 35hz and was happy with the daily results.

[Dangrebel 89]

Well I tuned low because I play alot of slowed songs as in 20 to 25 hz and I love low bass. Im still deciding wether I will compete or not but 30-33 hz is my goal tuning thanks for the input it maybe subs up port up in center. Any port location tips like left side or right side? Thanks Again!!

[Duran 387]

There is a reason they need high tuning...

[///M5 2,833]

Yep, if that is your goal buy different subs instead of those.

[Dangrebel 89]

Why is that? I've asked multiple people and no one has gave me a good answer

[Dangrebel 89]

Also i already have 1 hdc3 18 in my truck at 30 hz and it sounds good and LOUD!

[Randal Johnson 544]

Why is that? I've asked multiple people and no one has gave me a good answer

Sorry to thread jack, but are you going to meet up with me and go to USACI Finals ??

[Dangrebel 89]

I'm sorry when is it I forgot all about it?

[Randal Johnson 544]

I'm sorry when is it I forgot all about it?

[Dangrebel 89]

I'm sorry when is it I forgot all about it?

Um if it wasn't such a drive I would say yes right now but it's double the miles for me compared to you I believe, so I'm gonna call it a maybe I'll pm in a week or so and tell you a for sure answer.

[Randal Johnson 544]

Cool ...

Is your Back seat gone ??

[Randal Johnson 544]

and are you wanting to stay below the window line ?? If you decide to compete, below the window line will keep you in the stock classes (for USACI anyways) ...

[Dangrebel 89]

Yup it is sittin in my shop haha, I think it was a good choice to take it out, now it's only me and my girl that ride. Is yours out I couldn't remember from the pics?

[Dangrebel 89]

Uh I wish I could bit 13 cubes won't fit to easy

[Randal Johnson 544]

Yup it is sittin in my shop haha, I think it was a good choice to take it out, now it's only me and my girl that ride. Is yours out I couldn't remember from the pics?

Awesome ... Mine is in stock location, my wall is cut with a fiberglass bedcover ...

[Ohjay 116]

If you want to compete, you'll achieve a much better score by tuning around 38 with the HDC3s.

[Randal Johnson 544]

If you want to stay tuned that low and compete, my suggestion would be to build for USACI Street Q Class ...

Sort of a SPL / Sound Quality crossover ... To compete in Street Q, you must compete in a active SPL class too ...

[Dangrebel 89]

Aight well y'all convinced me, I'm moving my tuning to 35 hz and no higher haha. Dang peer pressure I will get another ap1500 or maybe sell the one I got now and get a sax 3500d. What do y'all reccomend amp wise?

[Ohjay 116]

Is your current HDC a D1 or D2?

[Dangrebel 89]

D1 I got the ap1500 at .05 ohms