I am wondering what the tuning of my box is, I put it in box pro box and thinking I screwed it up because its way off where its suppose to be... The dimensions are 22.25' wide 15.5" tall and 16.25 deep. The port is 1.75 wide and 20.625" long. This box was suppose to be for a 12w7 parameters: Fs = 27.2 Hz Qms = 7.807 Vas = 2.331 cu.ft Xmax = 1.142 in Sd = 84.01 sq.in Qes = 0.514 Re = 2.47 ohms Z = 3 ohms Pe = 750 watts If you could help me out here it would be greatly appreciated! Part of the learning process!
My box design program said 41 on those dimensions. Trying to achieve SQ, sound like crap as of now..that is the dimensions of one side of a box built for 2 12w7's, each are sealed off and in there own chamber with there own port. Does not hit very low at all.
Well I used re audio's box calculator and I input a 3/4" thickness for the wood.Is that what you have?
Now I get 36hz with the correction.I'm not so sure about this calc.,maybe some other guys can see what they come up with as well.
Ive done a box with that calc and it was far off. I use bass pro box but am learning how to use it and im 70% sure i screwed it up Well i WAS shooting for 30
I have a box in my car that was professionally planned out,I built it to his specs and it within a 1/2hz in tuning with the re calc.I'm not saying it's right I'm just saying.That really sucks that your that far off.I've been there and tried other programs but I don't know all of the terms and calculations that need to be done.That is why I left it for a professional.
First box and i know I messed up SOME cuts (free-handing with a worm drive circular saw)...I didn't have a table saw and I was wondering it sounded like crap after I sound deadened, and eliminated all the rattles... Im assuming its because its tuned to 36.5hz
I've had a set of subs powered with the same amp and tried 4 different boxes.I started out with a friend helping and a box tuned to 46hz.I kept tuning lower until I got what I liked.Right now it's close to 32,but my new sub is going to get a new box and lower tuning maybe 29 or so.I've only heard 1 12w7 and it sounded fantastic.
Mine were an orgasm to my ears in a sealed, but there wasn't enough output. This box sounds good on only long, drawn out bass notes, double bass is just awful.
The sealed did ALL the notes well, the tremors were nice too I was talking about the ported there, If i confused you there.
your wanting sq but are wanting to tune down too 30hz.. thought the lower you tune the deeper and more powerful the bass got(SPL)
Thought you tune lower for more SQ? My brother has 2 15" eclipses and they are 12cf (6cf each) and tuned to 29 and they sound good..
With a boxes tuning its all what you want and your resonant freq If your going spl you tune multiple times to get the highest db reading on the resonant freq. What was your sealed box tuned to that will give you what to tune your box to for your liking.Next thing what does the manufacturer recommend for port area per cube. Also hows your amp adjusted if your subsonic does not match the tuning of the box by exact or ten percent below the boxes tuning the sub will load and unload incorrectly and sound like poop.I use 12volt.com to tune my box it works for me I tune around 35 hertz hits lows and highs.