PandorasCustoms
Well-Known Member
- Joined
- March 11, 2010
- Messages
- 224
- Reaction score
- 1
- City, State
- Kissimmee, Fl
- Year, Model & Trim Level
- '94 Sport
So, I am getting ready to do a new build for a friend of mine. Nothing fancy, just some old 12" Sony Xplod with a 330x2 amplifier. He has them laying around from years ago, and just wanted to get them in his newer car.
The amplifier has no subsonic filter, so I really couldn't look into ported enclosures due to Cone Excursion issues below port tuning. So, the rear chamber has to remain sealed.
WinISD recommended .7 cu. ft' for each chamber to get the best low end performance without being to large that it would breach cone excursion. I was already thinking of dropping quite a bit of Poly-Fill in the rear chambers to get the most low end performance possible.
Now, has anyone had any experience with 4th order Bandpass enclosures? I have never actually built one, as they have all been sealed or ported in the past. I just don't want to build it and end up some huge nasty peaky sound at 80-90hz.
WinISD shows a good curve on when I tune the fron chamber to 70hz, but it looks pretty peaky to me, and not incredibly smooth. I know that the WinISD has no way to calcualte for Poly-Fill, so the high end will lose some db due to it (Which is what I am hoping for), while it will bring up the low end.
These are the two designs I have come up with.
The low-pass filter is set to 120hz
Here is an image of the WinISD charts. I don't have the car in front of me yet, so I haven't been able to get exact measurements on how big the front chamber can be, but this is just guestimates.
The build is supposed to take place this up coming Friday. Questions, comments, critiques, or concerns are always welcome.
The amplifier has no subsonic filter, so I really couldn't look into ported enclosures due to Cone Excursion issues below port tuning. So, the rear chamber has to remain sealed.
WinISD recommended .7 cu. ft' for each chamber to get the best low end performance without being to large that it would breach cone excursion. I was already thinking of dropping quite a bit of Poly-Fill in the rear chambers to get the most low end performance possible.
Now, has anyone had any experience with 4th order Bandpass enclosures? I have never actually built one, as they have all been sealed or ported in the past. I just don't want to build it and end up some huge nasty peaky sound at 80-90hz.
WinISD shows a good curve on when I tune the fron chamber to 70hz, but it looks pretty peaky to me, and not incredibly smooth. I know that the WinISD has no way to calcualte for Poly-Fill, so the high end will lose some db due to it (Which is what I am hoping for), while it will bring up the low end.
These are the two designs I have come up with.
The low-pass filter is set to 120hz
Here is an image of the WinISD charts. I don't have the car in front of me yet, so I haven't been able to get exact measurements on how big the front chamber can be, but this is just guestimates.
The build is supposed to take place this up coming Friday. Questions, comments, critiques, or concerns are always welcome.
