what does it take to get 150dB @ 25Hz?

10 batts? You shouldn't need that many should you? As long as you have a good ho alt or two. I'm not sure but its a free bump budy.

 

150 at 25Hz?????

In a vehicle?????

I dont see it happening, at least not without an INCREDIBLE amount of cash...


Low frequncies are all about moving air, ALOT of air. Then we have the length limitations of the vehicle, where even the quarter wave at that frequency would not develope. Then we have power, not just 12 volt power, but sheer high current unbridled wattage.

Lets say somehow you could hit 144dB at 25 Hz at say 5Kw....to get to 150 you would have to have either 20Kw of power or quadruple the cone area of the drivers. A large cargo truck comes to mind for this!


Not sayin it cant be done, but would not be easy............

 

why cant you tune on up to 35-40?

 

Everyone on CACO is saying it can be done lol so it can be done. I would start with different subs? You got the power. I would really focus on tuning, electrical, and subs. Maybe talk to PSI and have some subs made. Maybe Cascade Omega motors, BTLs, BIG gap Shocker Sigs (2004 and older) you will not do good with my motor at 25Hz, RE MTs, DD9500G, anything big really. Dave at PSI can make your subs do anything. With the right motors, you can use all 12K too. I guarantee if you do this, you will get that 150 at 25Hz, or even lower!!!!

I figure the motors to be around 200 ea, 150 ea for recones, and 30 to 50 ea for the baskets. IF I were you though, I would do a Ti style basket though so you have a 9.75" spider, and you will get more movement out of them. Ti's are hard to find and expensive though. They are around 120ea.

 

TheViking is right. A 25Hz wave is too long to fit in a car. Even if you use 1/4 wave design methodology (TheViking has a copy of my Design Methods), 25Hz is still too long.

It won't fit in the car.

The loudest daily driver I ever built was a old Honda Civic. The owner loved it. He could hit just slightly under 158dB. YES thats 158 and we did it with just 4 12-inch woofers and 2500-watts.









Tuning, try 55Hz.

 

148 at 25 Hz.....

Not calling you a liar, just sayin, i find that hard to believe. THe very concept of developing that high of an SPL at that low of a frequency fathoms me! I am wondering if vehicle resonance or some upper harmonics came into play with this SPL reading? Also curious.....where was the mic placed?

 

Actually, thats incredible and awesome.

My competition van would do middle to upper 160s. But I would use a 60 to 62Hz tone. At 25Hz, I seriously doubt it would do middle 140s (never tried it that low)

But you still have a ways to go, 2 to 3 more dB is a ways to go. But keep going. I wana see you get there.

 

I have been in the thing. It hits the lows kike crazy. Thing is loud and clean in anything low! Definitely a badass demo van.

 

I would love to see a TEF readoutI

 

Time, Energy, Frequency.....its a really cool fancy way to see time alignement, in conjunction frequency and levels at each frequency, in 3d....