Jump to content
Second Skin Audio

Quarter Wave / T-Line tutorial-UPDATED


Forevrbumpn

Recommended Posts

bump

2002 ford focus hatch

pioneer DEH-P8400bh

infinity kappa 6.5 components front and rear

XS Power D1200

Shuriken BT-100

audioque 120.4

2 15 inch audioque HDC3 D2

2 audioque 2200d

big 3

mechman 220a alt with external regulator

479-418-3056

Link to comment
Share on other sites

  • Replies 1.6k
  • Created
  • Last Reply

wow, I really haven't been on this thread in a long time, looks like lots of people have been hittin it up!!

Well, a lot of you guys here know I have been doing custom subs for awhile, just recently Scott and I have been going full throttle on subwoofer assembly, engineering/prototyping.

I honestly haven't even been building any boxes at all lately, just haven't been to concerned, I have always had boxes here to mess with. I finally ran out of boxes, and I'am thinking about doing some box prototyping

I have 4 subs on my mind that I want to do a single sub tline, or bandpass tline for, and they all have perfect specs!

(And if your interested, hit me up on pricing)

1) 18" Low lowwwww end monster, 13.5hz Fs 0.30Qts, 7 Qms, 0.31 Qes, nice heavy copper coil, and a whopping 58BL!!!

If I did this, I may do as a bandpass, tune it to about 30hz

2) 15" more of a SPL based subwoofer, 40hz Fs, 0.40 Qts and a 9Qms, this box would be more narrow banded, and more than likely SPL based

3) 12" SQ 12" sub, 34Fs 0.34 Qts 0.36 Qes will be a great Daily SQ woofer

4) Then this guy, most would say No don't do it! 10" VERY High SPL subwoofer 63hz after break in period, 0.21Qts 0.22 Qes, and 7 Qms- This one I' am interested in just to see if I can hammer it and pull some high DB #'s. Imagine a single 10" set up on 3000w/rms pulling a 150db in a tline in a crx??!!! Would be sweeeet

DSCN1241.jpg

DSCN1014.jpg

DSCN1253.jpg

th_DSCN1256.jpg

Which one do you guys think I should build a tline for????

GOOD NOON IVE BEEN READING ALL OF YOUR POSTS ABOUT TLINES GREAT STUFF YOU GOT GOING , IAM A BIT CONFUSE IN BUILDING ONE FOR MY 2001 CHEVY ASTRO..HOW BIG CAN I GO WITH THESE SUBS SPECS BELOW FOR SOME SICKENING RESULTS ON A T-LINE....IAM OPEN FOR DESIGNS AND PURCHASE PRINTS.. YOUR HELP WILL BE GLADLY APPRECIATED

http://alphasonik.com/index.php/en/support/ts-parameters.html

ALHASONIK PMA.D1200 CLASS D AMP..(THE OLD GREY ONE NOT THE BLACK)

12" ALPHASANIK MAYHEM DUAL 2ohm 2200RMS

FS -35HZ

QTS - 0.374

QMS - 1.485

SD - 10.5" FROM MIDDLE TO MIDDLE OF SURROUND

8.75 - MOUNTING DEPH

THIS IS WHAT I CAME UP WITH

1130 / 35HZ = 32.28

32.28 / 4 = 8.071' PORT LENGHT

10.25 / 2 = 5.12 X 5.12 = 26.21 X 3.14 = 82.34 PORT AREA

Link to comment
Share on other sites

y is there a section of the tunnel not calculated? when u see the line drawn down the middle. and how do you calculate what that should be for your application?

2x1236HZa.jpg

yes the i see it but idk y or how to calculate it for different size subs

2002 ford focus hatch

pioneer DEH-P8400bh

infinity kappa 6.5 components front and rear

XS Power D1200

Shuriken BT-100

audioque 120.4

2 15 inch audioque HDC3 D2

2 audioque 2200d

big 3

mechman 220a alt with external regulator

479-418-3056

Link to comment
Share on other sites

the area in red 2x1236HZa.jpg

2002 ford focus hatch

pioneer DEH-P8400bh

infinity kappa 6.5 components front and rear

XS Power D1200

Shuriken BT-100

audioque 120.4

2 15 inch audioque HDC3 D2

2 audioque 2200d

big 3

mechman 220a alt with external regulator

479-418-3056

Link to comment
Share on other sites

ok but i still dont understand how u knew to come out 6.25 inches b4 u started to measure the centerline of the tunnel

2002 ford focus hatch

pioneer DEH-P8400bh

infinity kappa 6.5 components front and rear

XS Power D1200

Shuriken BT-100

audioque 120.4

2 15 inch audioque HDC3 D2

2 audioque 2200d

big 3

mechman 220a alt with external regulator

479-418-3056

Link to comment
Share on other sites

ok but i still dont understand how u knew to come out 6.25 inches b4 u started to measure the centerline of the tunnel

it is the center of the back sub to the wall. I used the the center of the sub cutout and measured to the wall. I knew because someone on this forum told me to end the line that way. It is on one of the last 2 pages.

Link to comment
Share on other sites

ahhh haaa thank you sir thats what i wanted to know. that helps

2002 ford focus hatch

pioneer DEH-P8400bh

infinity kappa 6.5 components front and rear

XS Power D1200

Shuriken BT-100

audioque 120.4

2 15 inch audioque HDC3 D2

2 audioque 2200d

big 3

mechman 220a alt with external regulator

479-418-3056

Link to comment
Share on other sites

Hi everybody, i really like this section but i'm struggling a bit.

i want to build two different T-Line housings one for a 12" XS-L121P5 and a 15" XS-L151P5 SONY Subs i have lying around.

ok so far i have the following specs:

12" 15"

Fs 26.4 Fs 22.2

Qts 0.42 Qts 0.46

Qms 5.86 Qms 5.65

SD +/-90sq" SD +/-130sq"

If i calculated correct i have for the 12" 10.70ft port length abd for the 15" 12.73ft port length.

Now how do i go about designing the housings for them? this is really giving me a big headache.

Can someone please help me with this?

Thanks

Link to comment
Share on other sites

Archived

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

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Who's Online   0 Members, 0 Anonymous, 337 Guests (See full list)

    • There are no registered users currently online



×
×
  • Create New...