Ported vs Suspended

[mhardy6647]

Can you imagine what a poorly designed ported box would sound like ?

The Pioneer HPM-100 is a seminal example; tuned, according to Steve Scholl, to give a 4dB midbass hump. http://www.audioasylum.com/forums/vintage/messages/19/194305.html

 

[vintage4]

Acoustic suspension loudspeakers

What basic theory is that? I mentioned it several times .


It's called the air-spring of the driver in response to being in an air tight enclosure .



The air spring in a sealed box is still an undamped spring and will ring just like any other spring. The driver motor is what controls it just like in a ported design.

So is an undamped ported speaker which will ring even more so than the sealed enclose speaker .



We'll leave that one alone. What speakers do you manufacture ?


What makes these boom boxes superior to any other design ? Convince us !!



At or near resonance, a port and the driver will be pushing and pulling at the same time. The phase difference starts below the tuning frequency and is the reason for the sharper rolloff of a ported system.

These speakers are little more than glorified boom boxes . No matter how much you dispute . If this floats your boat then enjoy it . It doesn't matter what I think . Though I still believe that the sealed box approach is superior for what I need in my home . They are superior , period to the ported blow hole speaker systems .

 

[Urizen]

These speakers are little more than glorified boom boxes . No matter how much you dispute .

You've admitted your are not a speaker designer. RawW is, and knows exactly what he's talking about and produces. I've yet to hear a bad sounding speaker that's come from his shop - everything from TL single-driver designs to a three-way ported which shamed many hi-end speaker designs at our last fest.

You're welcome to your opinion on what you like best, but please refrain from insulting posts, such as the one above.

 

[dnewma04]

There was a time, when I first started building speakers where I thought sealed were better. Luckily, I had an open mind and learned as much as I could and listened to as much as I could. It quickly became apparent that I was mistaken. I also felt that horns sucked based on some remarkably poor designs from the 60s and 70s. I'm afraid that at some point, I'll become closed minded but I hope not.

 

[Fisherdude]

These speakers are little more than glorified boom boxes . No matter how much you dispute . If this floats your boat then enjoy it . It doesn't matter what I think . Though I still believe that the sealed box approach is superior for what I need in my home . They are superior , period to the ported blow hole speaker systems .

You show up a couple of months ago, and now you're insulting people. You have no idea who you're talking to, and it's not just RayW. There are members here who are professional electronics engineers who have spent their entire working lives understanding how speaker drivers work. There are members here who are acoustical engineers who have spent their entire lives working with sound systems. There are members here who are nationally known and respected designers and manufacturers of speaker systems.

World-class experts in speaker design who know the one fundamental truth about speaker design, that has, apparently, eluded you completely: There is no one superior speaker design; all speaker designs involve trade-offs and compromises.

Please, if you would, share some of your world-class knowledge and experience, some of your educational background in loudspeaker design, engineering, and manufacturing.

In some small way, justify what's coming out of your blowhole, or else you need to completely change your approach.

 

[dnewma04]

Arent we forgetting passive Radiators?

No. It's being covered by the ported side of the discussion.

 

[RayW]

It's called the air-spring of the driver in response to being in an air tight enclosure .

The problem is that it is still undamped. If you took a metal spring and twanged it it would ring. You can hear it. A sealed box is the same mechanism. It doesn't damp the motion. The damping comes from the spider and surround of the driver itself and the electrical damping of the motor. The box is not doing it.

What speakers do you manufacture ?

Mentioning my business is against AK rules (I'm not a paying vendor yet) but if you want my qualifications I can PM them to you.

What makes these boom boxes superior to any other design ? Convince us !!

I never said "boom boxes" are superior. What I'm refuting is that sealed boxes are superior. As Fisherdude said, speaker design is all about compromise. The superiority of any design lays in the design, not the topology.

Though I still believe that the sealed box approach is superior for what I need in my home .

That is a perfectly valid opinion. I'll even throw in a banana because you're happy with your speakers. However, it is your opinion.

They are superior , period to the ported blow hole speaker systems .

That, however, is not stated as an opinion. It is a blanket statement and an incorrect one at that. That is what I'm refuting, not your opinion or preference in speaker topologies.

 

[Zilch]

YO, Vintage4!

There are six moderators posting in this thread, and your blip is flashing brightly on the radar.

[You MIGHT want to rethink your strategy here.... :yes: ]

 

[Wooferman93]

No. It's being covered by the ported side of the discussion.

Ok. My bad. I was trying to spark some conversation on PR's due to I think they are better than Ported or AS. :yes:

 

[RayW]

Spark away! PRs use the same mechanism as ported designs. They have a bit more damping due to the suspension of the PR itself but other than that they operate just like a port. They really come into their own when you want to shrink down a box and tune it low. The requisite port usually becomes something ridiculous (I was just messing with a small driver in a tiny ported box and the best response required a port that was 1" diameter x 99" long). When you need that much mass then the PR is a natural choice. There have been some outstanding designs using PRs.

 

[jerrymrc]

YO, Vintage4!

There are six moderators posting in this thread, and your blip if flashing brightly on the radar.

[You MIGHT want to rethink your strategy here.... :yes: ]

And they are trying to be nice.

 

[bluesky]

So your logic is that you heard an acoustic suspension speaker that sounded really good, therefore all acoustic suspension speakers are better than ported speakers? I got to drive a friend's Mustang. It was really fast. It was red. Therefore all red cars must be faster than other colors.

Used to have a 'Red' 1964 TR-4A British Triumph sports car with a racing cam. It was fast. Very fast! I really 'Wish' I still had that car. :sigh: It was a dream machine.

AS or Ported: Get one excellent pair of each. That's what I did and glad I have them 'both'. Wouldn't have it any other way. Problem solved.

Want to hear music loud for 2-4 hours.....ported
Want to hear music all day and night.......acoustic suspension.

acoustic suspension are more 'musical' and the ported have the 'punch'.

 

[johnda]

I had a red TR3-A, it was also very fast. But then I had a black Corvette and it was faster, so the color black is definitely faster!

 

[johnda]

Oh, by the way, infinite baffle speakers can be a sealed box design.

http://loudspeakerdesign.co.uk/infinite_baffle.php

 

[Art K.]

And they are trying to be nice.

They are nice or this discussion would be over. As has been clearly stated, all designs represent trade offs. When well designed and executed most designs can sound fabulous.

 

[Dan ʕ•ᴥ•ʔ]

Lots of misinformation was stated in this thread as well as good information...most of which was ignored.
Time to put this one to bed and for everyone to move on.