Jump to content
Sign in to follow this  
nicholasrhall

2 12 inch SSA XCON box design ideas and I need help

Recommended Posts

ohh, but if my port is 5 inches wide, wouldnt it need to be five inches all around? cuz if i did a 36 inch length there would only be 3inches of space at the end

Edited by NickHall

Share this post


Link to post
Share on other sites

ohh, but if my port is 5 inches wide, wouldnt it need to be five inches all around? cuz if i did a 36 inch length there would only be 3inches of space at the end

Your port should have the same amount of area from the entrance to the exit.

Anything apart from the port is enclosure volume.

Share this post


Link to post
Share on other sites

ohhh so the port starts at the very beggining of the port opening in the box? ive been under the impression that if the port goes close to the back wall then the distance should be the same as the width of the port and should turn

Share this post


Link to post
Share on other sites

ohhh so the port starts at the very beggining of the port opening in the box? ive been under the impression that if the port goes close to the back wall then the distance should be the same as the width of the port and should turn

It only bends if you run out of room going that direction.

poort.jpg

Share this post


Link to post
Share on other sites

Am I missing something Stefan?

He's doing a side port. The external width of the box is 40.5" - 0.75" - 0.75" = 39"

The port length would be 36". Why wouldn't 36" fit in 39"?

So if his port was 38" long he would still not have to bend it?

Share this post


Link to post
Share on other sites

Am I missing something Stefan?

He's doing a side port. The external width of the box is 40.5" - 0.75" - 0.75" = 39"

The port length would be 36". Why wouldn't 36" fit in 39"?

So if his port was 38" long he would still not have to bend it?

If it was 38" long then that's pretty close to the panel, and I would reconsider it, but he would have 3.75" left open to the port entrance. You don't think that's enough?

If so, he could make the one length 34.75", and 1.25" for the second part. Correct?

Share this post


Link to post
Share on other sites

so it should effectively look like this?

That's what I was envisioning, but wait until Rick replies to my last post. I'm curious, and he's built more boxes then me. :P

Share this post


Link to post
Share on other sites

Am I missing something Stefan?

He's doing a side port. The external width of the box is 40.5" - 0.75" - 0.75" = 39"

The port length would be 36". Why wouldn't 36" fit in 39"?

So if his port was 38" long he would still not have to bend it?

but he would have 3.75" left open to the port entrance. You don't think that's enough?

I always try to bend at the port width if possible. 3.75 should be enough but I would still bend at 34.75. I know with aero ports people say half of the port width, but that is a minimum and I always try to use more if possible. Would your way sound any different than my way, maybe not. It is just how I have always done things and I was curious as to see when you would draw the line and bend it.

Share this post


Link to post
Share on other sites

Am I missing something Stefan?

He's doing a side port. The external width of the box is 40.5" - 0.75" - 0.75" = 39"

The port length would be 36". Why wouldn't 36" fit in 39"?

So if his port was 38" long he would still not have to bend it?

but he would have 3.75" left open to the port entrance. You don't think that's enough?

I always try to bend at the port width if possible. 3.75 should be enough but I would still bend at 34.75. I know with aero ports people say half of the port width, but that is a minimum and I always try to use more if possible. Would your way sound any different than my way, probably not. It is just how I have always done things and I was curious as to see when you would draw the line and bend it.

so would you say go through the trouble of bending it or jus leave it with 3.75 inches of clearance?

Share this post


Link to post
Share on other sites

Am I missing something Stefan?

He's doing a side port. The external width of the box is 40.5" - 0.75" - 0.75" = 39"

The port length would be 36". Why wouldn't 36" fit in 39"?

So if his port was 38" long he would still not have to bend it?

but he would have 3.75" left open to the port entrance. You don't think that's enough?

I always try to bend at the port width if possible. 3.75 should be enough but I would still bend at 34.75. I know with aero ports people say half of the port width, but that is a minimum and I always try to use more if possible. Would your way sound any different than my way, probably not. It is just how I have always done things and I was curious as to see when you would draw the line and bend it.

so would you say go through the trouble of bending it or jus leave it with 3.75 inches of clearance?

It doesn't require much more effort, so mine as well play it safe, and bend it.

Share this post


Link to post
Share on other sites

so would you say go through the trouble of bending it or jus leave it with 3.75 inches of clearance?

I personally would, but in the end it is your call.

Share this post


Link to post
Share on other sites

so would you say go through the trouble of bending it or jus leave it with 3.75 inches of clearance?

I personally would, but in the end it is your call.

how much would it bring the box volume down to?

what would it tune the box to to just bring the port to 34.75 inches? that would give me five inches all the way through

Edited by NickHall

Share this post


Link to post
Share on other sites

how much would it bring the box volume down to?

what would it tune the box to to just bring the port to 34.75 inches? that would give me five inches all the way through

34.75 vs. 36 would most likely be an undetectable audible difference.

Share this post


Link to post
Share on other sites

would there be a spl loss or gain going either way?

34.75 vs. 36 would most likely be an undetectable audible difference.

On a meter it might make a minute difference.

Share this post


Link to post
Share on other sites

aight so it would be like this correct?

but what would the volume end up as?

post-20638-0-35974900-1349588566_thumb.p

Edited by NickHall

Share this post


Link to post
Share on other sites

nvrmnd its like 4.053ft^3 tuned at about 33.285htz. unless my math is jus really screwed up

Edited by NickHall

Share this post


Link to post
Share on other sites

Thanks to everyone who has put input on this, i really and truely appreciated the help. i will be posting a build log for this box later, look out for it if you want. will also include installing door speakers extra batts and amps and stuff

Share this post


Link to post
Share on other sites

ok so i used sketchup to design the enclosure you mentioned to the best of what i could tell you were saying.

Did i do it right? is it tuned correctly? whats it tuned at?

Oh and i think i kinda went overbaord on screenshots, lol

http://www.soundsolu...&attach_id=3097

I'd use this one before all the others. 4.4ft^3 @ ~33hz add a little bit of dowel bracing and it would be perfect.

Share this post


Link to post
Share on other sites

ok so i used sketchup to design the enclosure you mentioned to the best of what i could tell you were saying.

Did i do it right? is it tuned correctly? whats it tuned at?

Oh and i think i kinda went overbaord on screenshots, lol

http://www.soundsolu...&attach_id=3097

I'd use this one before all the others. 4.4ft^3 @ ~33hz add a little bit of dowel bracing and it would be perfect.

the other one is about 4.5 cubes too, but i accounted for sub displacement (.34ft^3 for two 12's) and dowel bracing displacement. so it'll be roughly 4-4.1 ft^3 in the end.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

    1. Recent Topics

        • 212 comments
        • 18,298 views
        • 1 comment
        • 9 views
        • 5 comments
        • 212 views
        • 3 comments
        • 76 views
        • 28 comments
        • 2,269 views
        • 4 comments
        • 113 views
  • Similar Content

    • By Second Skin
      INDEPENDENCE DAY SALE
      Summer is in full swing and the parties are underway. After shooting off some fireworks and celebrating the nation's birthday this weekend, don't forget to scoop up some American made Second Skin products for your garage project.  
      Now through July 6th, take 20% off all products and enjoy FREE SHIPPING to all continental U.S. locations. Use FREEDOM20 at checkout to soak up the savings. 
       
      Don't forget to check out these new products
       
      Firewall Ceramic Thermal Coating Is Back

      Self Adhesive OverKill Pro 3/8" thick Closed Cell Foam

      Self Adhesive OverKill Pro 1/8" thick Closed Cell Foam

       
      Radiant Shield Reinforced Foil Heat Shield (1,000 degree F rated)

    • By Aaron Clinton
      We are adding more and more as we get closer to Black Friday.  #crSSAy good prices from the #1source for #authorized online car audio. 
    • By Aaron Clinton
      Check out all the interesting products here: https://store.soundsolutionsaudio.com/massive-audio/
      Some nice bluetooth amps, huge subs, matching rail caps and more.
       

    • By Aaron Clinton
      We have finally released our new amp.  It is a tiny tiny production run to see how people like them.  Meant for the high end, SQ market, without the European price tag.  If this model moves as well as I hope, it will help spawn another model in the line up soon.
      https://store.soundsolutionsaudio.com/ssa-dm150-2-2-channel-amplifier-150w-x-2-ch-or-500w-x-1-ch/

      Introducing the all new SSA DM150.2 amplifier. An old school approach, with updated components, for the most discerning of ears. If your front stage is lacking warmth and clarity, its time to upgrade. Our first amplifier in our high-end, sound quality, Class- A/B - Demon amplifier line. The SSA DM150.2 is the elite choice for that high end active front stage, premium passive components, and especially a sound quality sub (SSA Demon). We've incorporated direct inputs for those competition installs that use an external DSP and want their amp to be a pure gain block. Stellar looks to match the design and components. Don't let your speakers or your ears down, #levelup to the all new SSA DM150.2 amplifier.
       
      150 Watts RMS X 2 @ 4 Ohm 500 Watts RMS X 1 @ 4 Ohm Angled Terminals for show quality installations Full Complimentary low distortion Class AB design Tiffany Style RCA connectorsFull Complimentary low distortion Class AB design Butterworth Crossover Filters for premium level performance An extra pair of input connectors for a direct input that will bypass the crossover so the amp can act as a gain block The op amps featured are TI chips w/BB technology high performance audio grade IC's Docking Pads® to reduce vibration & extend the life the amplifier DC, Short Circuit, Thermal & Overload Protection, on board fusing Diagnostic LEDs Specifications
      OUTPUT POWER @ 14.4V input   RMS per channel at 4 Ohms 150 W x 2 CH RMS per channel at 2 Ohms 250 W x 2 CH RMS Bridged Mono at 4 Ohms 500 W x 1 CH RMS Mono at 1 Ohm N/A INPUT SENSITIVITY 200mV - 6.0V FREQUENCY RESPONSE 10Hz - 30KHz +/- 0.5dB THD LESS THAN 0.01% S/N RATIO > 103 dB CHANNEL SEPARATION > 91 dB DAMPING FACTOR @100Hz 4 ohm > 200 CROSSOVER RANGE   High Pass, 12dB/Octave 80-1.2K Hz Low Pass, 24dB/Octave 10Hz - 250Hz Subsonic N/A Variable Bass Boost (0 to +12 dB bass boost at 45 Hz) Yes Phase Shift (0 - 180 degrees) No Fusing 3 x 40A Size (L x W x H) in 16.4 x 8.9 x 2.2
  • Recent YouTube Posts

×