low (22Hz) port tuning in real world trunk applications

[thur5d4yf4n 10+ year member]

the lowest tuned box I have had was a 10" L7 tuned to 28 and it sounded amazing compared to my other boxes tuned higher around 32 and 33

 

[azimuth 5,000+ posts]

i have a box tuned to 26 for an RE MX. sounds pretty nice.

 

[azimuth 5,000+ posts]

in a box that's 4 cubes tuned to 10hz, a single 6 inch aero would be around 16 feet long.//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

 

[mcsoul 10+ year member]

in a box that's 4 cubes tuned to 10hz, a single 6 inch aero would be around 16 feet long.//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

Space station box ftw

 

[Biggy 10+ year member]

i heard a solo x 18 in 7,5cubes box tuned to 23hz

never heard anything else that did go that low and sounded so amazing

 

[mlstrass 5,000+ posts]

No real reason to tune that low in a car environment, but HT then yes...

 

[Immacomputer 10+ year member]

No real reason to tune that low in a car environment, but HT then yes...

What about personal listening preference? That's a pretty big and real reason to me.

 

[80INCHES 5,000+ posts]

i was told that if u tune anywhere in the low to mid 20's it will sound like a sealed box but it will have the output of a ported box...so if a sealed box does like 20hz at -3db...the ported box (depending on how big it is) tuned in the low to mid 20's should be higher...

it would be nice to have a box tune to 22hz that has a +3db bump at 20hz

80

 

[mrogowski 5,000+ posts]

Those who tune low usually end up disappointed because the sub they bought didn't "slam" or "hit hard". Hence the popularity for Type R's, HDC's and the like. Folks tune them high for that nice peaky output...

 

[mlstrass 5,000+ posts]

What about personal listening preference? That's a pretty big and real reason to me.

What are you listening to in car that is dropping down into the low 20's? I don't listen to anything like that, so I've never tuned that low....

 

[helotaxi 5,000+ posts]

It allows you to have a low f3 AND avoid the peaky response of tuning too high. The correct tuning (Butterworth or Chebysev) is almost always going to sound better than some arbitrary tuning. It doesn't matter that the music doesn't have content down that low. Flat response is flat response. My older XXX tuned to 28 hz (flat response) sounded significantly better than the same sized box tuned to 33hz. Correct tuning makes all the difference.

 

[mcsoul 10+ year member]

It allows you to have a low f3 AND avoid the peaky response of tuning too high. The correct tuning (Butterworth or Chebysev) is almost always going to sound better than some arbitrary tuning. It doesn't matter that the music doesn't have content down that low. Flat response is flat response. My older XXX tuned to 28 hz (flat response) sounded significantly better than the same sized box tuned to 33hz. Correct tuning makes all the difference.

This is what I really wanted to hear. I'm going to

have to allow my bias and choose this as my answer!

 

[mlstrass 5,000+ posts]

It allows you to have a low f3 AND avoid the peaky response of tuning too high. The correct tuning (Butterworth or Chebysev) is almost always going to sound better than some arbitrary tuning. It doesn't matter that the music doesn't have content down that low. Flat response is flat response. My older XXX tuned to 28 hz (flat response) sounded significantly better than the same sized box tuned to 33hz. Correct tuning makes all the difference.

I agree on tuning for a flat response, but have never gone down into the 20's for a car application. Perhaps flat on a graph isn't always flat in car as you can't calculate for cabin gain much like room acoustics in a home.

I've tried my HDC's from 35-40Hz and haven't noticed a loss in SQ, but have gained some punch on kick drums when playing them loud

 

[mrogowski 5,000+ posts]

Frankly, if you're going to tune to the low 20's you might as well simply go with a sealed design or IB for that matter. There is little point having a port there when its not being used...

 

[mcsoul 10+ year member]

I think the difference is substantial:

Imageshack is slow as fawk today. refresh if needed. ported in green.