Solar HX12 - box questions, help needed in box design

[levelg]

here's a pic i 4got to add. doing the curves and port fitting in this one.The sierra in the background is a future sound project - maybe do 15" sub install in there.

[Donovan]

Not bad man.But try and fire the port more to the front.Its facing almost to the rear window!If you can get it to face straight up it might help a bit!

[levelg]

That might be a problem. The bakkie has 2 nasty corrugations running behind the port and runs at the angle I have the port at. Moving the port is might upset the pressure e buildup in the box.

I think I will modify my other box to fit in the port firing straight up.

Quick question : How do I manipulate the shape of a round port, to get it elliptical? If some1 can help me with this then I am also gonna run a 10" port to get more dB's.

[Donovan]

Well just use winISD and see how many cubic cm you have in the 10" and then cange it to a square and just addjust size till you get same amount of cubes!!!

[levelg]

I was actually refering to the reshaping of a round plastic 10"port to a eliptical one. this is so that i can fit it in mybakkies narrow box.

I think i amgetting the whole ported box theory now. I have made my mind up - the otherbox is going under the knife soon - I must get that 140dB b4 end of year!

[Donovan]

well you can heat it up and put it in a press or something.But don't know hoe you going to flare it then!

[levelg]

very slowly don. .Busybuilding some stuff in the back of the bakkie bit is a suprise. I was thinking of doing something similar to that golf box you had.

[Donovan]

Aaaah you must post pics when you are done man!!!

[levelg]

will do

[levelg]

Need some help with getting my pressure to the windscreen. My meter measures 150+ dB 200mm above the port. Any recommendations to get it to the window???

[Donovan]

Install bucket seats and fold them forward?

[levelg]

Will measure with the seat down and see if it makes a "verskil".

[Donovan]

It must.Let us know!

[levelg]

measured with the seat down. 139.3 dB
with seat up. 139.4 dB
with passenger door open 135.8 dB

Noticed some interesting things. The sub box seems to be tuned +- 10Hz higher than what resonant frequency is. will readjust the port and see if I can get my 140dB by this weekend, maybe 140dB on the termlab at the next sound off.

Owning a dB meter sure makes my tuning a lot easier.

140 dB here I come

[Donovan]

See with the seats down your tuning is not going to be right.Re-tune the port with the seats down and let me know what happens!