Anyone with sa-8s in a extra cab midsize to fullsize truck?

[braapboogcafish 1]

Just wondering how your sa-8s perform in your extra cab midsize to fullsize trucks. Installed a single sa-8 into a x-cab 2008 F-150, .75ft^3 tuned to 33ish with i think either 10 or 13.3 sq inches of port area (im a noob at sub enclosures). The box came out perfect and right on spec. Not satisfied with the results, the tuning sounds good and it sounds good musically but it just doesnt get loud enough, gets 1/4-1/3 as loud as it does in my friends car. Tested it on 2 different amps at 4 ohms, zx400.1 and kx1200.1. so it was getting 200rms first then 400+. small difference in output.

Im wondering if his truck needs a bigger or smaller box to achieve more output?

How does this sound to you?

[ricksi30 923]

Probably the box. If you can't figure out port area how can you be sure it came out right. Not trying to be a jerk, just trying to help.

[braapboogcafish 1]

no worries man i dont take offense to that. the guy that gave me the box design says it has 13.3 sq inches of port area. i just wrote 10-13.3 because im not sure if i fully know how to read the RE calc right yet.

these are the numbers for the re calc

19

9.5

14

14

0.75

1.25

12

[ssh 924]

Bigger box would probably yield more output

[stevemead08 752]

i dont suggest a larger box for an sa-8.

i run 4 in a 2.4 cube box.

[stealth 113]

i did a quick design for this guy on RE since thats the only thing he is familiar with. i told you its 13.3 square inches of port per cube. i told you its .75 cubes so you can throw more power.

someone tell this guy that 1 8inch sub will sound louder in a CRX then in a full size truck.

[braapboogcafish 1]

Why does someone need to tell me that? I already know it. Im just trying to see what others have experienced with the same or similar setups, is something wrong with that?

[edouble101 314]

Why does someone need to tell me that? I already know it. Im just trying to see what others have experienced with the same or similar setups, is something wrong with that?

There is nothing wrong with your thinking

Unfortunitely I can not directly answer your question since I do not own a truck

Have you experimented with subwoofer enclosure placement in your cabin? Sometimes that makes a big difference. Sundown recommends 0.5^3ft ported for the sa-8. Your larger enclosure should be more effeicent.

[braapboogcafish 1]

yea i seen that after testing he dropped the rec spec size to .5-.7 for any amount of power.

and power efficiency isnt a need in this setup, no lack of power from the brz1200.1.

we kind of played around with placement, more like port direction. still have to try actually moving the box around the back seat more. and might try a smaller box just for the heck of it

[stealth 113]

dude, what you want is 37hz tuning with 16 square inches of port. why did you say anything about musical in the first place.

[braapboogcafish 1]

no, i dont want 37hz tuning. and yes musical is always a must. i just didnt forsee this setup coming up so short in his truck, the airspace of his truck vs the hatchback didnt seem like that huge of a difference to me. hes real happy with how it sounds on everyday music (i am too) but still wishes it could get louder. were gonna do what i said in my most recent msg and if that doesnt work then im recommending him to either get another 8 or just go for 10s or 12s.

if it was my truck i would have it full of sound deadener, upgraded alt and electricals and the works..but he just cant spend that much cash so other options need to be used instead for now.

[stealth 113]

no, i dont want 37hz tuning. and yes musical is always a must. i just didnt forsee this setup coming up so short in his truck, the airspace of his truck vs the hatchback didnt seem like that huge of a difference to me. hes real happy with how it sounds on everyday music (i am too) but still wishes it could get louder. were gonna do what i said in my most recent msg and if that doesnt work then im recommending him to either get another 8 or just go for 10s or 12s.

if it was my truck i would have it full of sound deadener, upgraded alt and electricals and the works..but he just cant spend that much cash so other options need to be used instead for now.

what are you planning on doing again? too much port area and youll start losing musicality. too big a box youll be able to feed it less power, therefore not getting as loud.