[G Georgopoulos]

I want to find out which is the best,I was designing and building loudspeakers a long time ago(90s),so refresh my memory,it would be interesting to know which is the best today(more popular),back then i went for sealed boxes and I still do today,but what is your pick and why,please keep the subject sealed vs ported when posting...

thanks guys...

[G Georgopoulos]

ok,why sealed is better,first you have infinite baffle which pushes sound forward and best isolates the front from the back of the drivers,ported on the other hand has a port which adds sound from the back of the drivers and from the inside of the box,it has too much bass,ported became popular in the say 80s because the size of the box became small,what people dont know is sealed boxes sizes have a direct relationship with the power hadling capability of the sealed loudspeaker,for example a 10w speaker requires a smaller box than a 100w speaker this effects the bass of the sealed box and the response graph of bass,if you can design this with high precision the sealed box loudspeaker becomes haha  lets say the ideal loudspeaker...

[FireGuy]

I want to find out which is the best,I was designing and building loudspeakers a long time ago(90s),so refresh my memory,it would be interesting to know which is the best today(more popular),back then i went for sealed boxes and I still do today,but what is your pick and why,please keep the subject sealed vs ported when posting...

thanks guys...

All of my bookshelf main speakers have been ported.  So I can't give a comparison or opinion Vs. a sealed design.  I do own however Aperion's 5C center.  It's a sealed, passive radiator design that trumps the other ported centers I have owned.  So in terms of this speaker application I vote sealed for sure.    Moreover, given all the design parameters manufactures have to consider I really can't commit to say one design is better than the other. 

[WireNut]

I like push-pull sealed or ported cabinets for the bottom end....


 

[RDavidson]

I don't see that one is "better" than the other. All speaker designs have their tradeoffs and it really comes down to your priorities with regard to bass extension, efficiency, room size, placement, and perhaps even the types of music you mostly listen to.

[dB Cooper]

Then there are the planar and OB devotees, who argue that the best box is no box....

[planet10]

I don't see that one is "better" than the other. All speaker designs have their tradeoffs and it really comes down to your priorities with regard to bass extension, efficiency, room size, placement, and perhaps even the types of music you mostly listen to.

To expand on this. Execution is very important.

One has you also consider that most drivers (midbasses anyway) available for diy today are aimed at vented boxes, so that is most often how you will see them used.

Myself, i am not a big fan of "traditional" vented boxes. They are typically tightly tuned using a set of T/S parameters. But T/S parameters are not scaler, they are curves depending (largely) on drive levels. This means that due to use of the volume controls and the dynamics in the music themselves vented boxes are usually out of tune. One can reduce this issue by adding an "R" to the vent. This can take the form of some sort of damping material (a so called aperiodic vent), or by making the vent such that it has a high aspect ratio. One gives up some extension/quantity in exchange for better quality.

If you can find a woofer that works sealed, you can get some really high quality bass, and the roll-off can often be better matched to roon gain.... i'm still looking for a suitable replacemnt for the CSS SDX7.

dave

[Guy 13]

I don't see that one is "better" than the other. All speaker designs have their tradeoffs and it really comes down to your priorities with regard to bass extension, efficiency, room size, placement, and perhaps even the types of music you mostly listen to.

 

Guy 13

[Guy 13]

Then there are the planar and OB devotees, who argue that the best box is no box....

 

Guy 13

[G Georgopoulos]

To expand on this. Execution is very important.

One has you also consider that most drivers (midbasses anyway) available for diy today are aimed at vented boxes, so that is most often how you will see them used.

Myself, i am not a big fan of "traditional" vented boxes. They are typically tightly tuned using a set of T/S parameters. But T/S parameters are not scaler, they are curves depending (largely) on drive levels. This means that due to use of the volume controls and the dynamics in the music themselves vented boxes are usually out of tune. One can reduce this issue by adding an "R" to the vent. This can take the form of some sort of damping material (a so called aperiodic vent), or by making the vent such that it has a high aspect ratio. One gives up some extension/quantity in exchange for better quality.

If you can find a woofer that works sealed, you can get some really high quality bass, and the roll-off can often be better matched to roon gain.... i'm still looking for a suitable replacemnt for the CSS SDX7.

dave

Planet10, it is much easier to build a sealed loudspeaker than any other type!!,if you can factor in power vs
box size then that's it no more to worry about,any speaker can be used as long as you get the box size right...

[planet10]

Planet10, it is much easier to build a sealed loudspeaker than any other type!!,if you can factor in power vs
box size then that's it no more to worry about,any speaker can be used as long as you get the box size right...

That is certainly true.  You can also use any speaker sealed, but you may well find that most diy drivers available today will have limited LF extention.

dave

[G Georgopoulos]

but you may well find that most diy drivers available today will have limited LF extention.

dave

yes ,that is a problem...

[G Georgopoulos]

This is what i also found in my days of loudspeaker building

loudspeaker systems efficiencies sealed vs ported

loudspeaker systems efficiencies (bass)

basicly are the opposite in regard to these two systems

low watt sealed is most efficient(acoustically) whereas low watt ported is least efficient(acoustically)
high watt sealed is least efficient(accoustically) whereas high watt ported is most efficiently(accoustically)

regards...

[bladesmith]

This is what i also found in my days of loudspeaker building

loudspeaker systems efficiencies sealed vs ported

loudspeaker systems efficiencies (bass)

basicly are the opposite in regard to these two systems

low watt sealed is most efficient(acoustically) whereas low watt ported is least efficient(acoustically)
high watt sealed is least efficient(accoustically) whereas high watt ported is most efficiently(accoustically)

regards...

And when you say 'low watt' and 'high watt', what
Size of systems are you referring too..?

[Guy 13]

This is what i also found in my days of loudspeaker building

loudspeaker systems efficiencies sealed vs ported

loudspeaker systems efficiencies (bass)

basicly are the opposite in regard to these two systems

low watt sealed is most efficient(acoustically) whereas low watt ported is least efficient(acoustically)
high watt sealed is least efficient(accoustically) whereas high watt ported is most efficiently(accoustically)

regards...

Hi Georgopoulos and all Audio Circle members.
May I ask if you could re-write your post with improved English.
Your write up is confusing,
I really don't know what you are saying or what you want to tell us.
Please try again with different words.

Guy 13

[G Georgopoulos]

Hi Georgopoulos and all Audio Circle members.
May I ask if you could re-write your post with improved English.
Your write up is confusing,
I really don't know what you are saying or what you want to tell us.
Please try again with different words.

Guy 13

Hi Guy13

This means alot of things if you think about it!

one of the things is:

Sealed loudspeaker systems are best at low loudness levels.
Ported loudspeaker systems are best at high loudness levels.

For home use sealed is better.
For club use ported is better.

of cource you can use any speaker type anywhere

this was just a comparison between these two...hope this helps, if not, no worries...

[geowak]

Is a passive radiator a ported design or sealed? I have had two different passive radiator design speakers.

[Guy 13]

Is a passive radiator a ported design or sealed? I have had two different passive radiator design speakers.

Hi geowak and all Audio Circle members.
For me passive radiator is between sealed and ported.
Sorry, can't say more than that !

Guy 13

[planet10]

Is a passive radiator a ported design or sealed?

A PR is a port substitute.

dave

[planet10]

Sealed loudspeaker systems are best at low loudness levels.
Ported loudspeaker systems are best at high loudness levels.

For home use sealed is better.
For club use ported is better.

Far too much a genealization that falls apart very quickly.

dave