two dd 9500 15's or one dd redline 800 18"?


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ferguson621

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Feb 3, 2015
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Olathe, ks
Yes I do know that net is what you want, i just figured I'd let you know the gross just because

And yes net was after port and sub displacement
 
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ferguson621

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Feb 3, 2015
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Olathe, ks
So i found out they don't like 4 cubes each....the first one I made they had about 3.4 each.....so im going to cut the second box down and see how they sound. They're loud now, but they sound like they're bottoming out on certain songs.....like plastic slapping together. So my guess is they'll do better with 3.25-3.4 cubes each. I will post an update here shortly if anyone cares to know

And i finally made the port so im able to adjust the tuning now. Its great lol
 

blazian87

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So i found out they don't like 4 cubes each....the first one I made they had about 3.4 each.....so im going to cut the second box down and see how they sound. They're loud now, but they sound like they're bottoming out on certain songs.....like plastic slapping together. So my guess is they'll do better with 3.25-3.4 cubes each. I will post an update here shortly if anyone cares to know

And i finally made the port so im able to adjust the tuning now. Its great lol
You can also just add wood inside to make the box smaller and then readjust with port tuning.
 
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hispls

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They're loud now, but they sound like they're bottoming out on certain songs.
If they're bottoming out you should try to either adjust the box tuning lower or adjust your subsonic filter higher or just be careful when playing those songs. Shrinking the box will lose you efficiency all around so if your answer is to just not be as loud you can just do that by keeping the volume knob down on those songs.


I promise you 5 cube net with 40hz tuning is where you're going to start seeing some proper numbers but you will absolutely need to be careful about playing much below tuning. Keep in mind also you've got a fair bit over double the power they can realistically handle continuously. I suggest build the box efficient and learn how to turn that shit down on the songs that make the subs angry.
 
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ferguson621

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Feb 3, 2015
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Olathe, ks
I understand what your saying

But before when they were in the smaller box, which was 6.8 cu ft they never bottomed out, and they were alot louder than they are now.

Thats why im puzzled as to why they arent louder now with having 4 cubes each.

After owning the hd8000 1 ohm version and currently the md8000.1 2 ohm version. I've decided I fuccking hate taramps.

For them to get loud i have to damn near have the gain turned all the way up. I dont like that shiit.
 

shredder2

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Nov 19, 2017
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So i found out they don't like 4 cubes each....the first one I made they had about 3.4 each.....so im going to cut the second box down and see how they sound. They're loud now, but they sound like they're bottoming out on certain songs.....like plastic slapping together. So my guess is they'll do better with 3.25-3.4 cubes each. I will post an update here shortly if anyone cares to know

And i finally made the port so im able to adjust the tuning now. Its great lol
Got any pics of the box in its current state?
22767

That's some SERIOUS port area above imo... I'm guessing you have it tuned super high, are wanging away way under tuning or your ssf is set incorrectly as well.
 
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shredder2

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How much port area should they have?
Got pics of it in there? 156in2 of port is a tad high but not a deal breaker. You said its finished so I'd love to see it in its current state. Adjustable port?... it's a square/slot?
Realize that bandwith will be reduced with a 40hz tuning. Don't be surprised if your ssf ends up being in the mid-hi 30's as I think that amp has a 12db/octave slope. And limiting anything under low 30's at full volume might be a good idea too. Spl has tradeoffs and bandwith/musicality is a big one.
My .02
 

hispls

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Yes, let's see how the box sits in the trunk. You already went from 8.7 cube to 7.7 cube, how much volume do you actually have? What are you using for source (music/tones) to determine which is louder and how your response is?

Have you checked for flexing in that box? The bottom is a big piece for just 1 layer without any bracing (2x3, 2x4, or even 2x2 works fine and is cheap). Are you certain every seem is airtight? Are you sure the subs are seated tightly? I really think you must already have a box you can work with by now with some tweaking and care.

Also I'd heard the opposite about the Taramps and gain/sensitivity to high head unit voltage. I've never used those but I just put in a Soundigital and it can push into protect just a couple clicks above lowest.
 
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ferguson621

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Feb 3, 2015
486
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Olathe, ks
At the moment just a 50hz 0db test tone.
Yes im sure the subs are sealed right.
Also the box is sealed up, i made sure of that.

I have not checked for flexing in the box yet.
And when I had the hd8000 your exactly right hispls.....the gain was super sensitive, i just barely had to turn the gain up, like a 1/16th up and it was good to go.....but with this shittty md8000, its completely opposite. Its really weird. I'd never recommend the md line to anyone.

The reason I bought the md is because I was researching on which one I should get because I dont have the funds to drop on a Korean...anyways somebody on here that started another thread had mentioned they would go with the md line so I was like fuckk it. I had the hd why not try the md.......i should have got the bass 8k but it didn't come with the free dsp either. Another reason I chose the md.....


Thank you for your input as well shredder.....ok so the first box was 7.2 net with 120in2 of port tuned to 39hz

Second one was 7 cubes tuned to 34hz with 121 sq in of port

Right now its 8.5 cubes tuned to 38hz with 145sq in of port
 

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hispls

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I'd never recommend the md line to anyone.
Then again, what did you pay for it vs. what were your options at that price point? I'm digging the Soundigital. Put a 159.2 up on the leader board at the local shop this morning and it plays music and stays cool well enough. Of course I've got a way over built battery bank to feed it too.

What I'm seeing there that may be holding you back is that with the hatch closed there's no room for the wave from the port to get up and to the front. Not sure how far the port opening even is from the back of the vehicle but if it's really crowded it can also cause trouble. Might also try to double up those port walls too, I'm betting those are flexing a bit and you could lose 1.5" side to side and not notice much difference in tuning. Bonus points cut the insert pieces with 45 degree angles so that it makes a flare going in and out of the port.

Please don't throw a fit and destroy any more boxes. You can use what you have to do more testing at the very least.
 
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ferguson621

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Feb 3, 2015
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Olathe, ks
Sound digital was an option, I should have went with that instead. I seriously thought about it. I really wish I hadn't got this taramps, I regret it terribly. And I dont plan on throwing a fit and destroying any boxes.

So if I use 2x6's to fill the inside how many will I need to drop it down to 7.28 cu ft? Currently it's at 8.5 cu ft, im going to change the shape of the port to how I had it in the original box and see if they're able to get as loud as they did before. Because the first port was 6x20x20 which is 39hz with 120in2 of port area.

I wish i had taken a video of them. But there's nowhere around here where im able to just sit there and play them. I always have to get on the highway so its really shittty
 

hispls

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What subs, and type of box was used to achieve that 159.2?

Oh and I paid $540 for it and the dsp
An 8 foot 2x6 is a little less than half a cubic foot. My build log is towards the top of the page in the build logs section here in the forum.

Dunno what you expected out of a 540$ amp + DSP brand new. Really if it makes over 4000W and doesn't light your car on fire for that price you're doing pretty good.
 
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ferguson621

Senior VIP Member
Feb 3, 2015
486
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Olathe, ks
Thank you for the info! Lol
Haha I completely agree with you
Care to help me with the math? My pieces are 33.5 inches long


And i was just thinking.....could having a 300a fuse vs a 750a have anything to do with it?
 

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