new box for 2 18"
new box for 2 18"
so this will be my last test to see if i can break the 145 mark.
the only problem i have with my subs are that their are no correct specs on line. I had msg Erik Harbour but this is what he gave me
Fo (Hz) 33
QMS 4.98
QES 0.87
QTS 0.82
VAS (Liters) 28.76
REVC (Ohms) 5.2 (series)
SPL @ 1 watt / 1 meter (dB) 88.9
X-max Linear pk-pk (mm) 28
LEVC at 1k Hz (mH) 1.9
ENCLOSURE VOLUME'S SEALED
Minimum sealed (Cu. Ft) 1.75
Fill Required (%) No
3dB down point (-3dB Hz) 41
Maximum sealed (Cu. Ft) 2.5
Fill Required (%) No
3dB down point (-3dB Hz) 38
ENCLOSURE VOLUME'S PORTED
7 ftcu.
PORT SIZE 15 x 5 x 11.75
tune to fit application custom 42 HZ decrease legnth to raise freq.
SEALED 3 ftcu.
Here is a photo of my new box. could some one help me with correct cubic feet.
the only problem i have with my subs are that their are no correct specs on line. I had msg Erik Harbour but this is what he gave me
Fo (Hz) 33
QMS 4.98
QES 0.87
QTS 0.82
VAS (Liters) 28.76
REVC (Ohms) 5.2 (series)
SPL @ 1 watt / 1 meter (dB) 88.9
X-max Linear pk-pk (mm) 28
LEVC at 1k Hz (mH) 1.9
ENCLOSURE VOLUME'S SEALED
Minimum sealed (Cu. Ft) 1.75
Fill Required (%) No
3dB down point (-3dB Hz) 41
Maximum sealed (Cu. Ft) 2.5
Fill Required (%) No
3dB down point (-3dB Hz) 38
ENCLOSURE VOLUME'S PORTED
7 ftcu.
PORT SIZE 15 x 5 x 11.75
tune to fit application custom 42 HZ decrease legnth to raise freq.
SEALED 3 ftcu.
Here is a photo of my new box. could some one help me with correct cubic feet.
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ur gonna need to go bigger the total space there isn't enough for the 7 cubes each that they say they require... how do u like the kores? i have one sitting here that i haven't even used yet and i'm debating on tossing together a box for it to try it out, are u trying to build under the window line? ur box there is only showing around 7.5 cubes when i figured it out with 3/4 material all the way around and that is without taking out the port or sub displacement
ur gonna need to go bigger the total space there isn't enough for the 7 cubes each that they say they require... how do u like the kores? i have one sitting here that i haven't even used yet and i'm debating on tossing together a box for it to try it out, are u trying to build under the window line? ur box there is only showing around 7.5 cubes when i figured it out with 3/4 material all the way around and that is without taking out the port or sub displacement
Last edited by Menace; Apr 12, 2009 at 10:46 PM.
The current box is tuned at 42hz, it hitting its highs and lows. I do have an extra 10" in the back though. the box would then reach from the back seat to the tail gate. i would have the get rid of the lip on each end or i will not be able to get it in the car.
Guest
Posts: n/a
ok then... leve it how it is if u did a 43 with the current box why don't u resin the box and round off the port corners and the top back corner of the box and see if that'll gain u anything... if u put the 2 18s in 7.5 cubes it'll probly be great for 40-45 hz and have nothing else just a burp box imo
from everywhere ive read the HK ma audio IS loud but sound terrible. and prob y your not getting the type of bass you want.
hows the bracing in the box???? i would say like ross resin inside. i would prob put a round aero port as big as you can go to reduce air turbulance and eddies.
also is that box just sitting in the trunk??? if so i would put 4 bolts through the box and the floor soo you can bolt it to the vehicle to make sure that it really doesnt move and loose energy
hows the bracing in the box???? i would say like ross resin inside. i would prob put a round aero port as big as you can go to reduce air turbulance and eddies.
also is that box just sitting in the trunk??? if so i would put 4 bolts through the box and the floor soo you can bolt it to the vehicle to make sure that it really doesnt move and loose energy
from everywhere ive read the HK ma audio IS loud but sound terrible. and prob y your not getting the type of bass you want.
hows the bracing in the box???? i would say like ross resin inside. i would prob put a round aero port as big as you can go to reduce air turbulance and eddies.
also is that box just sitting in the trunk??? if so i would put 4 bolts through the box and the floor soo you can bolt it to the vehicle to make sure that it really doesnt move and loose energy
hows the bracing in the box???? i would say like ross resin inside. i would prob put a round aero port as big as you can go to reduce air turbulance and eddies.
also is that box just sitting in the trunk??? if so i would put 4 bolts through the box and the floor soo you can bolt it to the vehicle to make sure that it really doesnt move and loose energy
