Jump to content

Enjoy the new look!

Archived

This topic is now archived and is closed to further replies.

Ron36

Where to put port ?

Recommended Posts

First off I'm no expert but.... 1-4" aero has about 12.57" of port area. you want 10"-16" of port area per cubic foot of box, maybe even more depending on the sub, which i believe sundown likes more. I would recommend a slot port with an area of around 55", as you will get into running several aeros and it becomes a lot less efficient.

Hopefully one of the more veteran box guys will chime in to verify my info.

Share this post


Link to post
Share on other sites

Port noise can come from any type of port that doesn't have enough area to keep velocity down to an acceptable level. I don't know what velocity port noise becomes audible, maybe someone does. The highest I've seen anyone recommend is 30m/s. I'd say you'd need at least a 6" areo, but that probably wouldn't be enough to put you below 30m/s. And keep in mind that as port area increases, port length increases as well in order to maintain the same tuning.

30 m/s is what i have read as well, that is just over 98 ft/sec. to stay under that he would need 2-6" areos for 81 ft/sec or 1-8" for 90 ft/sec. a slot port with an area of 50" puts him at 90 ft./sec. i think will be hard for his space restrictions as the ports get pretty long eating up his box volume.

Share this post


Link to post
Share on other sites

U guys are speaking another language here , i can run 1 6 inch port coming out the side thst can be long but its about 5 inches from the door panel


2 Sundown SD3-10's D4 ohm Sealed box

Skar Audio RP1200.1

Mids all Alpine type R 's 1 set of 6.5 components and 1 set of 6x8's 

2 Rockford PBR's 300x2

1 Kinetic battery  under rear seat , Big 3

Ford F150 2018 Crewcab                                                                                                                               

Share this post


Link to post
Share on other sites

Summary, you need more space to tune the box where you want it an have an effective ported enclosure. If you are stuck with the specs you have you may need to downgrade the driver size. You will still need room for port, smaller boxes naturally need more port volume to tune lower - or you end with a bunch of port noise and inefficiencies.


CURRENT SYSTEM:

  • Alternator:
    1. Stock alt on mids/highs
    2. Isolated DC Power 270 SP - Charging @ 16.8v
  • Batteries: (2) XS D1400s
  • Power Cable: Double Runs of 1/0 KNU Kolossus Fleks
  • Headunit: 80-PRS
  • Sub Amp: DC 5.0k
  • Subwoofers: 2 RE MT 15s /PSI dual .7ohm recones
  • Subwoofer Enclosure: 9.1cubes @ 32hz - brutal.
  • Mids & Highs Amp: CT125.4
  • Active Components:
    • Mids RE XXX 6.5c
    • Highs - 3 RE XXX tweeters per side(A pillar)
  • Noise Control: Damplifier Pro all over the cab.

Build Log

If you do business with me please leave feedback here: FEEDBACK THREAD

 
Highest Legal Score: 151.0 db
Highest Musical 30 Second Average: 151.6 db

Share this post


Link to post
Share on other sites

So what am i looking at port wise for 2.4cubes with 2 sa-10's


2 Sundown SD3-10's D4 ohm Sealed box

Skar Audio RP1200.1

Mids all Alpine type R 's 1 set of 6.5 components and 1 set of 6x8's 

2 Rockford PBR's 300x2

1 Kinetic battery  under rear seat , Big 3

Ford F150 2018 Crewcab                                                                                                                               

Share this post


Link to post
Share on other sites

your choices:

32 hz

1x8" aero 49" long

1- 8"x6" slot port at 46.5"

35hz

1- 8" aero @ 40"

1-8"x6" slot @ 38"

Also remember as the port gets bigger the box needs to get bigger to compensate for the port volume.

Share this post


Link to post
Share on other sites

Thanks for putting this in english for me i really appreciate it , will try to figure somthing or just go sealed witch i dont want to but may not have a choice


2 Sundown SD3-10's D4 ohm Sealed box

Skar Audio RP1200.1

Mids all Alpine type R 's 1 set of 6.5 components and 1 set of 6x8's 

2 Rockford PBR's 300x2

1 Kinetic battery  under rear seat , Big 3

Ford F150 2018 Crewcab                                                                                                                               

Share this post


Link to post
Share on other sites

Could get crazy and run external port behind seat?? not sure how that would sound or if there is room but just a thought.

Share this post


Link to post
Share on other sites

I thought about that 2 thats where most of my batteries are but might look into it


2 Sundown SD3-10's D4 ohm Sealed box

Skar Audio RP1200.1

Mids all Alpine type R 's 1 set of 6.5 components and 1 set of 6x8's 

2 Rockford PBR's 300x2

1 Kinetic battery  under rear seat , Big 3

Ford F150 2018 Crewcab                                                                                                                               

Share this post


Link to post
Share on other sites

×
×
  • Create New...