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Enclosure Help for 4 IA Death Penalty 15s


load350z

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What's up bassheads, trying to keep this short and to the point. I got a wall built for my Nissan Altima 4door and from the sounds of the setup it not sounding the way I was hoping. I think he went with a program online to figure out wall design, he says tuning is 36hz or 37hz but sounds way higher.. the car bass is punchy... if anyone has any experience building enclosures for these.. plzzzzz let me know! Thanks in advance bassheads. I attached the measurements and design..

Death Penalty Series 15

Sealed Not Recommended

Ported 3.0 cubes - 5.0 cubes, 36 - 80 Inches of Port, 32-37 Hz

Average: 4.0 cubes, 55 inches, 32-37 Hz

would these specs work? I think these recommendation was for the 2008 dp 15s!

Equipment: Four  DP 15s D2 (2012 model), currently on a reserve 40.1 running at 1ohm. more power (10k-12k) will be added later.

Resized_20171115_134533.jpg

2002 Nissan Altima v6 3.5

  • Four Incriminator Audio Death Penalty 15s
  • 5 Pairs DS18 Pro Audio X6.5BM
  • 3 Pairs DS18 Super Tweeters
  • Taramps TS2000x4 (Mids Amp)
  • Incriminator Audio 6.4 (Tweeter Amp)
  • Incriminator Audio 40.1 subs amp
  • Rockford Fosgate 3sixty.3
  • 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator
  • Big 3 zero gauge.
  • Excessive amperage H/O 225a
  • Alpine head unit
  • Lots of stinger deadener
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The first thing I'd suggest is you verify the tuning acoustically. You can easily do this by playing sine wave test tones at moderate level while watching/feeling cone excursion.  The excursion will be at a minimum at the tuning frequency and will increase as you raise or lower the test tone frequency from that point. 

Let us know what the tuning actually is and then we can proceed from there.  

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

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ok I will try that... I was hoping someone could look at the pic I load with the measurements of the enclosure and port and let me know what volume they get along with the port tuning.

2002 Nissan Altima v6 3.5

  • Four Incriminator Audio Death Penalty 15s
  • 5 Pairs DS18 Pro Audio X6.5BM
  • 3 Pairs DS18 Super Tweeters
  • Taramps TS2000x4 (Mids Amp)
  • Incriminator Audio 6.4 (Tweeter Amp)
  • Incriminator Audio 40.1 subs amp
  • Rockford Fosgate 3sixty.3
  • 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator
  • Big 3 zero gauge.
  • Excessive amperage H/O 225a
  • Alpine head unit
  • Lots of stinger deadener
Link to comment
Share on other sites

21 hours ago, load350z said:

ok I will try that... I was hoping someone could look at the pic I load with the measurements of the enclosure and port and let me know what volume they get along with the port tuning.

Its really hard to read the numbers in your pic.  Port calculations are exact anyway, since you are having problems you will be better off to find your tuning with the method I gave you anyway.  

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

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ok.. I will let you know

2002 Nissan Altima v6 3.5

  • Four Incriminator Audio Death Penalty 15s
  • 5 Pairs DS18 Pro Audio X6.5BM
  • 3 Pairs DS18 Super Tweeters
  • Taramps TS2000x4 (Mids Amp)
  • Incriminator Audio 6.4 (Tweeter Amp)
  • Incriminator Audio 40.1 subs amp
  • Rockford Fosgate 3sixty.3
  • 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator
  • Big 3 zero gauge.
  • Excessive amperage H/O 225a
  • Alpine head unit
  • Lots of stinger deadener
Link to comment
Share on other sites

finally got a chance to find the acoustical frequency.. and its tuned to 44hz

2002 Nissan Altima v6 3.5

  • Four Incriminator Audio Death Penalty 15s
  • 5 Pairs DS18 Pro Audio X6.5BM
  • 3 Pairs DS18 Super Tweeters
  • Taramps TS2000x4 (Mids Amp)
  • Incriminator Audio 6.4 (Tweeter Amp)
  • Incriminator Audio 40.1 subs amp
  • Rockford Fosgate 3sixty.3
  • 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator
  • Big 3 zero gauge.
  • Excessive amperage H/O 225a
  • Alpine head unit
  • Lots of stinger deadener
Link to comment
Share on other sites

yea it did!

2002 Nissan Altima v6 3.5

  • Four Incriminator Audio Death Penalty 15s
  • 5 Pairs DS18 Pro Audio X6.5BM
  • 3 Pairs DS18 Super Tweeters
  • Taramps TS2000x4 (Mids Amp)
  • Incriminator Audio 6.4 (Tweeter Amp)
  • Incriminator Audio 40.1 subs amp
  • Rockford Fosgate 3sixty.3
  • 3 shuriken batteries (BT-80 under the hood) (2 BT-120 in the trunk) with isolator
  • Big 3 zero gauge.
  • Excessive amperage H/O 225a
  • Alpine head unit
  • Lots of stinger deadener
Link to comment
Share on other sites

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