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  #1  
Old 11-29-2016, 04:39 PM
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I've been around this site for several years now but never really posted because I could find all the answers I could ever need. Including buying a couple yardsale SA-8's...now to my history with Sundown.
I originally had a v1.5 in a box I built that I was never happy with. It was my first and a very simple box. Very rectangular and the port was too small...the things you learn with experience.
After that I bought a v.2 and a guy build a sonotube enclosure for me. It got down, dirty and loud but lacked the punch that my initial box had.
Until this point I had only had a rockford p500.1bd, which is definitely capable of thoroughly punishing an SA-8. Both 8's are dual 2's

I had some spare time a few weeks back and decided I wanted to build a box for both of them to go in the trunk of my neon. First off, I know the mismatch subs is probably some of my cancellation issues and I know the v2 is beating the v1.5 to death and found its mechanical limits when the gain is cranked too high. LOL. I bought a refurb kenwood amp that's supposed to do 1,000 @ 2ohms.
I know these things move a lot of air but I wouldn’t think they would move enough to cause me to have pressure related issues but what do I know really...
I ended up with a box about 1.6 cuft and tuned to 32ish. All MDF with a 3x12 slot port. Let me just say I'm happier than with the previous enclosure and it's mainly due to better SQ, these things continue to surprise me... for the record, I had two old kicker 10's sealed before and it's been years since I had them. I haven't had a real sub other than these 8's



Anyways, down to the meat and potatoes. It's the age old "My bass gets louder when I open the doors" dilemma...

Orientation 1: Subs and port originally pointed same direction. I tried pointing forwards and backwards(box only fits that way), up against the seat or all the way to the back of the trunk.
I got a pretty good increase in sound just by opening the drivers door, and more with both doors open.
Orientation 2: I ended up cutting up the side of the box to change the outlet of the port, the box right now is as far back as it’ll go. The port faces into the rear passenger corner of the trunk with the subs pointed to the rear.
Still an increase in sound when the doors are open but I believe it is better than it was with orientation 1


Other options? Or maybe someone has some other ideas?
1: Seal off the rear facing sub openings and mount them in the top with the port facing rear or side.
2: Build a ported box for my v.2 and corner load it and enjoy less bass and still better SQ without opening windows.
3: Buy a yardsale SA-10 and see what a bigger sub is like
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Old 11-29-2016, 05:07 PM
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I go bigger and more power. Bryan@sundown told me he got a 147 out of two 6.5 so maybe you should call sundown and ask him?
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Old 11-29-2016, 06:16 PM
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Could try lowering port to 2x12 and see if it sounds better

I'm not sure I understand the issue though
Is it quiet? Add more power they will take it
Sound bad? Adjust settings / change box
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Old 11-29-2016, 08:56 PM
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Quote:
Originally Posted by SXX360 View Post
I've been around this site for several years now but never really posted because I could find all the answers I could ever need. Including buying a couple yardsale SA-8's...now to my history with Sundown.
I originally had a v1.5 in a box I built that I was never happy with. It was my first and a very simple box. Very rectangular and the port was too small...the things you learn with experience.
After that I bought a v.2 and a guy build a sonotube enclosure for me. It got down, dirty and loud but lacked the punch that my initial box had.
Until this point I had only had a rockford p500.1bd, which is definitely capable of thoroughly punishing an SA-8. Both 8's are dual 2's

I had some spare time a few weeks back and decided I wanted to build a box for both of them to go in the trunk of my neon. First off, I know the mismatch subs is probably some of my cancellation issues and I know the v2 is beating the v1.5 to death and found its mechanical limits when the gain is cranked too high. LOL. I bought a refurb kenwood amp that's supposed to do 1,000 @ 2ohms.
I know these things move a lot of air but I wouldn’t think they would move enough to cause me to have pressure related issues but what do I know really...
I ended up with a box about 1.6 cuft and tuned to 32ish. All MDF with a 3x12 slot port. Let me just say I'm happier than with the previous enclosure and it's mainly due to better SQ, these things continue to surprise me... for the record, I had two old kicker 10's sealed before and it's been years since I had them. I haven't had a real sub other than these 8's



Anyways, down to the meat and potatoes. It's the age old "My bass gets louder when I open the doors" dilemma...

Orientation 1: Subs and port originally pointed same direction. I tried pointing forwards and backwards(box only fits that way), up against the seat or all the way to the back of the trunk.
I got a pretty good increase in sound just by opening the drivers door, and more with both doors open.
Orientation 2: I ended up cutting up the side of the box to change the outlet of the port, the box right now is as far back as it’ll go. The port faces into the rear passenger corner of the trunk with the subs pointed to the rear.
Still an increase in sound when the doors are open but I believe it is better than it was with orientation 1


Other options? Or maybe someone has some other ideas?
1: Seal off the rear facing sub openings and mount them in the top with the port facing rear or side.
2: Build a ported box for my v.2 and corner load it and enjoy less bass and still better SQ without opening windows.
3: Buy a yardsale SA-10 and see what a bigger sub is like


Does the rear seat fold down to gain access to the trunk from the cabin? If not try to vent the trunk into the cabin. Vents in the rear deck
If it folds down point them forward and seal the trunk w sub & port forward. Just some ideas


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Old 11-29-2016, 11:10 PM
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They were also probably tuned relatively high and put in a bigger box and some ridiculous power...

Can't add more power...the v1.5 would get torn apart by the v2

I'd rather not leave the rear seat down all the time...I do throw stuff back there occasionally and I don't want to advertise to any curious person there's equipment in the trunk...

I think with what I've done, changing port direction and all the way to the back of the trunk has worked. I was just curious if there were some tricks to getting it even better with the windows up

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Old 11-30-2016, 07:28 AM
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So, what I believe is happening is that at lower power levels I am getting cancelation between the two sub's. I.e. if I turn the subwoofer output up from the headunit then it pounds great.
But at lower levels I can hear spots where the sound dies off and comes back

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Old 12-04-2016, 11:33 AM
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Decided I will be keeping the box in my car... So I sent money for 2 yard sale sa8 v3's. Now to find a 1 ohm stable amp to pound the snot out of them!!
Windows down increases low end infinitely but man do I love these "little" 8's

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Old 12-04-2016, 01:24 PM
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As for an amp I'm looking for something that will do 1200 watts or so at 1 ohm.
I've got a Rockford p500 and its been great to me, I've been looking at a p1000. There's a used one on eBay right now with another amp for $350, be roughly 275 for the p1000 after selling the other one for ~75

Any other suggestions that will match what I'm looking for? Limiting myself to 350-400 for the amp. Thanks!

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Old 12-04-2016, 03:39 PM
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Found an saz1500d semi-locally. I won't even tax it I know but its a smoking deal

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Old 01-10-2017, 02:37 PM
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I've had the saz in for a bit now, I must say I wasn't impressed at first but I upgraded to a sony headunit which has 5v preamp outputs and I am amazed at how much cleaner it sounds with this headunit.
The amp is now wired in with a 1/0 kit and the battery is in the trunk, 2 awg running from front to back. I have to do the head on the car so I'm going to bite the bullet and upgrade the stock wimpy 85 amp alternator to a 120 amp while I'm in there as it'll be easier to change and add the extra wire off the amp and another ground to deal with more amperage.

My big question is: is 2 awg sufficient for the 120amp alt? The run from front to back is less than 15ft.
I've seen charts from a couple of sites that say 120+ is 2...I know you can never have too much wire in power transmission in car audio. I guess even just another run of 4awg would be worth it?

I'm totally looking forward to not seeing my voltage drop, and the increase in performance wont hurt either. I try to stick to a 1v drop right now.
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