2fnould's build log

[2fnloud]

It is tuned to 42.87Hz. My only concern is that the ends of all the 1/2" are sealed......time will tell.

[reallyxxxxxxloud]

Wow Id make sure you're using a infrasonic filter (wrongly called a subsonic filter). Its tuned quite high but if you mostly listen to Techno/Hardcore/Metal that will work well.

[2fnloud]

I trust my output graphs.....I hope.

[2fnloud]

Wow Id make sure you're using a infrasonic filter (wrongly called a subsonic filter). Its tuned quite high but if you mostly listen to Techno/Hardcore/Metal that will work well.

Did some graph plotting.....

1. with the box tuned to 42.87Hz (my box I am building) 30" long port. Red
2. with the box tuned to 38.29Hz (recommended by by BassBoxPro6 with the Vb that my enclosure is) 38" long port. Cyan
3. with the box tuned to 30.00Hz (Fs of the speaker I am using) 63" long port. Orange

Normalized Amplitude response @30Hz:
1. -5.02Db
2. -3.75Db
1. -2.55Db

It takes what, a 10Db gain for the human ear to perceive double the volume. Is the box tuned to it's optimum frequency, it would appear not. But what I built should be very decent sounding.

Not only do I have a infrasonic filter...I have THE infrasonic filte....I have a Bass C.U.B.E. You even sent me the "top secret" tech bulletin for it.

[mk_]

Your pics of the deadening bring back bad memories of deadening everything on my stealth in the middle of January in Buffalo (**COLD**). Vowed I would never do it again, but once it was all over it was so worth it. When do you anticipate the completion of this project?

[2fnloud]

I REALLY want to have it done for NG but I don't think it is going to happen, I work on it when I can, as long as I can.

[reallyxxxxxxloud]

Did some graph plotting.....

1. with the box tuned to 42.87Hz (my box I am building) 30" long port. Red
2. with the box tuned to 38.29Hz (recommended by by BassBoxPro6 with the Vb that my enclosure is) 38" long port. Cyan
3. with the box tuned to 30.00Hz (Fs of the speaker I am using) 63" long port. Orange

Normalized Amplitude response @30Hz:
1. -5.02Db
2. -3.75Db
1. -2.55Db

It takes what, a 10Db gain for the human ear to perceive double the volume. Is the box tuned to it's optimum frequency, it would appear not. But what I built should be very decent sounding.

Not only do I have a infrasonic filter...I have THE infrasonic filte....I have a Bass C.U.B.E. You even sent me the "top secret" tech bulletin for it.

I wasn't suggesting the infrasonic filter because of output but for the protection of the sub as it will unload below port freq tune. And as a fair bit of music has notes below your tuning Id be careful. If you listen to the types of music I suggested then you should be fine but if your into Crunk etc then yeah I'm glad you have your bass cube. Also output isnt a concern as you will get a decent transfer function @20hz being a hatch. My main concern was its high tuning and sub unloading below tuned freq causing damage to it.

[reallyxxxxxxloud]

Dam friggin double posts GRRR

[2fnloud]

Dam friggin double posts GRRR

You can delete it... OK I follow you. I got a chance to demo one box today. VERY crude method, I connected the box up to my receiver in my garage, tuned in a radio station and tuned into the same station with the car radio. The home receiver is only 75 watts RMS it sounded good.

I am going to be satisfied with this, I won't be setting SPL records obviously...but that wasn't my intent with this.

[reallyxxxxxxloud]

Yeah but in car you could be up to 12 db gain...