I need some help to achieve a better sound / deeper bass
Yankee
Joined: Oct 2003
Posts: 3,599
Both should sound good if optimized, ported can sound as good as sealed
Ported should be louder and probably more dynamic than sealed
Ported might go lower if the port is designed optimally if not then sealed will go lower.
Sealed is easier and uses a smaller box, ported has rewards though
Ported should be louder and probably more dynamic than sealed
Ported might go lower if the port is designed optimally if not then sealed will go lower.
Sealed is easier and uses a smaller box, ported has rewards though
50 Watt CAFz'r
Joined: Feb 2008
Posts: 163
Only the sub itself can dictate if it will sound "better" in a ported or sealed enclosure. The "magic" measurement is the "efficiency bandwith product". It is not talked about much here. If it is less that 50, the speaker will ONLY sound good in a sealed box. Over 100 and it is meant in a PORTED BOX. Anything between 50-100 will do either.
Only the sub itself can dictate if it will sound "better" in a ported or sealed enclosure. The "magic" measurement is the "efficiency bandwith product". It is not talked about much here. If it is less that 50, the speaker will ONLY sound good in a sealed box. Over 100 and it is meant in a PORTED BOX. Anything between 50-100 will do either.
How does one find the "EBP"?
Subs are : Eclipse SW7124DVC-T2
Here are the specs from the manual:
Fs 25
Qms 9.42
Vas (cft) 2.17
Cms 0.2
Mms 209.5
Rms 3.47
X-Mech 34
Dia 216
Sd 245
Vd 33.52L
Qes 0.44
Re 3.6
Le 2.2
Z 2ohms+2ohms
BL 16.4
Qts 0.42
1-Watt SPL 80.3
2.83v SPL 80.5
Last thing I want to do is switch to a ported box only to find that it has much better SQ in a sealed box. I think my main concerns are SQ and low deep bass. I hope that I can have both.
While I personally prefer a ported box for efficiency, there is no competition for the control that a sealed box has over lower frequencies.
If you want loud, powerful sub sound, port your box.
If you want tight, controlled sub sound (20hz to 50 hz) then a sealed box is what you want, as long as the subs you've chosen can do it and as long as you have a properly built and tuned box.
If you want the best of both worlds, then a passive radiator will give you the option.
When doing an SQ system like this, you'll also need an amp that can deliver more than wattage. You'll want something with a lot of headroom, good damping factor at the impedence that you'll be using and proper wiring.
If you want loud, powerful sub sound, port your box.
If you want tight, controlled sub sound (20hz to 50 hz) then a sealed box is what you want, as long as the subs you've chosen can do it and as long as you have a properly built and tuned box.
If you want the best of both worlds, then a passive radiator will give you the option.
When doing an SQ system like this, you'll also need an amp that can deliver more than wattage. You'll want something with a lot of headroom, good damping factor at the impedence that you'll be using and proper wiring.
O.k. so the numbers are telling me that a sealed box would be a better choice.
Now, If I add say polyfil to increase box size, what would be the outcome?
Does anyone have a link to program that will calculate the box size, amount of polyfil to achive a certain tuning frequency?
Currently each sub is in a 1.3 cu ft box. As per the manual, it would be tuned at about 41 hz.
I'm guessing that I would want to go down to 35-36 to get better bass reproduction?
Now, If I add say polyfil to increase box size, what would be the outcome?
Does anyone have a link to program that will calculate the box size, amount of polyfil to achive a certain tuning frequency?
Currently each sub is in a 1.3 cu ft box. As per the manual, it would be tuned at about 41 hz.
I'm guessing that I would want to go down to 35-36 to get better bass reproduction?
50 Watt CAFz'r
Joined: Feb 2008
Posts: 163
Hooray Blu 
A sub with a high Qes and a low Fs has a "looser" suspension and just wont be "happy" in a ported encloser. The good news is it looks like those subs will HAMMER in a big sealed enclosure.
I have a good program, but it is in my PC at home (i'm goofing off at work shhhhh....!)
I'm sure some on here has one. If not, pm me and I will do it this weekend.
As far as stuffing the box, it will slow the sound waves and the sub will react as if it is in a larger box, but it is not a cure all.
A sub with a high Qes and a low Fs has a "looser" suspension and just wont be "happy" in a ported encloser. The good news is it looks like those subs will HAMMER in a big sealed enclosure.
Does anyone have a link to program that will calculate the box size, amount of polyfil to achive a certain tuning frequency?
I have a good program, but it is in my PC at home (i'm goofing off at work shhhhh....!)
I'm sure some on here has one. If not, pm me and I will do it this weekend.
As far as stuffing the box, it will slow the sound waves and the sub will react as if it is in a larger box, but it is not a cure all.
50 Watt CAFz'r
Joined: May 2007
Posts: 384
I did say CAN sound better..it's not always the case..but in many instances a ported enclosure will give the best sound from certain setups.. it's all relative to the specific equipment being used.
As for getting louder and playing deeper.. it's a no brainer... properly designed ported enclosures win hands down every time
As for getting louder and playing deeper.. it's a no brainer... properly designed ported enclosures win hands down every time
Wow this is the first time I have even heard a vented enclosure playing lower than a large sealed box....
The only things a vented box does better is play typically 3 db louder at the tune frequency over a sealed.. and make shitty noises, LOL..
IB offers the smoothest Frequency response, and also plays the lowest..
so to sum it up your awnser could not be farther from the Truth!~
