posted
Just finished an install on my 95 probe. Put a DD 3515 in 3.5 cubic foot (after displacement) box with 2 - 4" aeroports at 17.75". Hooked to a RF 1000a2. Box is a standard CRX design. I've been toying with box placement and right now its sub up port to the side. Sounds decent, but a friend had this exact setup in his 98 Explorer and it was quite a bit better in there.
So I'm assuming the problem is related to box design, tuning or placement. Any suggestions??
posted
Is this due to the larger overall airspace in the cabin? I was thinking that putting it in a smaller vehicle was going to improve output.
Now that its in though, it isn't as loud but I was thinking part of the issue had to do with firing the sub up. My last setup was 2 - 12" thunder 8000's in a slot port box sub and port facing back only pushing 125rms to each. it sounded fairly good, but when I tried moving that box around I found the worst thing I could do was face the sub and port up. So I'm thinking that might be part of my issue with this setup.
Posts: 8 | From: Oshkosh, WI | Registered: Aug 2009
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posted
What are you looking to accomplish? If you are looking for spl then you r going the wrong way. As it stands you have 6 sq inch of port per cubic foot which is about half of what you want minimum. With the port length you listed you are tuned to 30.53 hz which is good for deep bass but output will suffer.
IF spl is your goal you could throw 2 more 4 inch ports in and go with a length of 21 inches for a beginning tuning of 40hz and start testing from there. Even at 40hz it should still sound good on music and be close to 4 dbz louder than you have right now.
-------------------- Cadence CMW6 Components Orion 4004 Component Amp Soundstream XXX-6500D for now AudioQue HDC3 15 Alum D1 151 from the trunk National Champion MidwestSPL Basic Trunk Posts: 93 | From: Des Moines Iowa | Registered: Mar 2009
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posted
I'm going for a street beat system. I don't want to tune it really high for the sake of spl, but more or less I'd like the best of both worlds. I want it to hit hard and sound decent.
I plan on competing in DB drag and bass race, but no straight SPL tone stuff.
Posts: 8 | From: Oshkosh, WI | Registered: Aug 2009
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quote:Originally posted by Jason_S79: I was thinking that putting it in a smaller vehicle was going to improve output.
Not true if your system is designed for street beat system.
Just wanted to share my experience...I have a 2000 toyota 4Runner and a '91 CRX.
The system is a single sub setup which is a 18" and 2500w amp. It sounds loud in my 4runner. I think it would sounds much louder in my CRX. I put everything same equipment from my 4runner into the CRX ie: wiring, battery, rca, head unit, sub box, amp, everything expect 200a alternator in my CRX. I have a stock alt in my 4runner. anyway, guess what? the system sounds louder in my 4runner.
Posts: 334 | From: B.C. , Canada | Registered: Dec 2001
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posted
40hz would be a good place to start for ya. It's kind of the upper end of daily and the lower end of spl... All depends on what the car likes. One issue you might have with such a tall box is some problems with airflow restrictions. If you can rebuild it so it's a little more wide and short it might open up some air over the top of the box.
-------------------- Cadence CMW6 Components Orion 4004 Component Amp Soundstream XXX-6500D for now AudioQue HDC3 15 Alum D1 151 from the trunk National Champion MidwestSPL Basic Trunk Posts: 93 | From: Des Moines Iowa | Registered: Mar 2009
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posted
One thing I've been noticing... It's a lot louder with the windows up. with everything else I've had its been a little louder with the windows down. Not sure if this points to a specific problem but I thought it was worth mentioning. It sounds a bit washed out to me - I can't think of a better way to describe it.
Posts: 8 | From: Oshkosh, WI | Registered: Aug 2009
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AQintrepid been working with that cavalier for 5 years now I think, and took 4 years to break a 150 and countless hours and boxes. Its just a box in the trunk sealed off from the cabin with mono foam, big port, car has no sound deadening what so ever yet, box was raw double 3/4" mdf no resin or anything, 45`s in the 2 rear corners and roundover on port wall, but have changed the box to a much smaller box with large aero port not fully sealed off and not much testing its down 1/2db from previous testing numbers, not to worried for this season as its ending here soon, I`ll have it ready for next season hopefully.
Garett
-------------------- Rd Audio Sundown Audio
New Setup All in a 97 Cavalier 2dr Trunk! 2 RD 3250.1`s 1 RD 15" Heavyweight 1 Oddysee 2150 4 Runs of 1/0
quote:Originally posted by Jason_S79: not as of yet. I'll take some pics soon.
That will tell us alot in respect to where to start.
Crabmustang..... To hit a 153 on the tl from a trunk is amazing. Loud never comes easy huh?! I've often wondered about the RD HW as a possible upgrade but I am not ready to go to the extreme it will take to properly power one yet. Only thing I have left to try with the current box I have is pvc 45s in the corners and an internal flare. If I see more than a 150 I'll go all out and glass and finish sand the interior of the box.
-------------------- Cadence CMW6 Components Orion 4004 Component Amp Soundstream XXX-6500D for now AudioQue HDC3 15 Alum D1 151 from the trunk National Champion MidwestSPL Basic Trunk Posts: 93 | From: Des Moines Iowa | Registered: Mar 2009
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posted
I took 2" off the ports this weekend, and that seemed to help some. But it leaves me with a question. The ports are precision ports I purchased from parts express. They list the ports as being 17" but when I measured them I was getting 17 7/8" - 18". So with the flared ports what point am I measuring to?
Also what are your thoughts on slot vs aero ports? I'm going to build a new box and I'm not sure what way to go. The big plus I see to the aero ports is the ability to try several different tunes.
Posts: 8 | From: Oshkosh, WI | Registered: Aug 2009
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posted
You want to measure the aero ports from there longest point of each end including the flare. cut them down a half an inch to an inch at a time till you get the tuning you desire.
As for Aero vs Slot port, it really depends on the system and vehicle, I prefer slot ports personally but with slot ports you need a larger box as the port takes up box volume and in some applications thats not an option. But as for which will be louder I think either can be with proper box and tuning.
-------------------- Rd Audio Sundown Audio
New Setup All in a 97 Cavalier 2dr Trunk! 2 RD 3250.1`s 1 RD 15" Heavyweight 1 Oddysee 2150 4 Runs of 1/0
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They subtract half the distance of the flare from the total of the length of the port. This is how they come out to 17 inches. For practical purposes tho I have always found using this method leaves me tuned a little lower than I was shooting for so use crabs advice and just measure all the way to the edge. For spl I'm sold on aeroports but done correctly they both can be loud. Just make sure you have ENOUGH port.
-------------------- Cadence CMW6 Components Orion 4004 Component Amp Soundstream XXX-6500D for now AudioQue HDC3 15 Alum D1 151 from the trunk National Champion MidwestSPL Basic Trunk Posts: 93 | From: Des Moines Iowa | Registered: Mar 2009
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posted
On the rebuild it looks like you might do well to build the box wider and shorter. Have you tried to flip the back seat down and slide the box away from the rear wall? I know you wouldn't want to run it that way but it might give you some idea of how far back you want your ports when you build your next box. Maybe instead of 4 4inch ports you could go with a couple 6 inchers.....
-------------------- Cadence CMW6 Components Orion 4004 Component Amp Soundstream XXX-6500D for now AudioQue HDC3 15 Alum D1 151 from the trunk National Champion MidwestSPL Basic Trunk Posts: 93 | From: Des Moines Iowa | Registered: Mar 2009
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posted
well, I slid it forward on the seats. sounded worse. I also tried moving it farther back. Also sounded worse.
Also I ended up breaking something on the bass knob for the rockford. For whatever reason the amp is pretty much gutless if you unplug it. I don't want to install it so I was wondering if anyone had an idea how to bypass it.
Posts: 8 | From: Oshkosh, WI | Registered: Aug 2009
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posted
unplug it and it's bypasses, then readjust your settings on the amp
Posts: 5511 | From: Columbus, OH - formerly FL | Registered: Oct 2003
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