[UpperCut]

Hi there,

I have been over the last three month or more working on my drawings for one of my 5 upcoming and new I.S.C.T (Innovative Slice Construction Technique) Sandwich build type enclosure projects, but unfortunately I can’t find a lot about the subject at all in my own manual nor the automated research on any of my Server.

If anybody is knowledgeable about this technique of using a dual - sealed as well as vented compartment in an enclosure?
Any help would be greatly appreciated.

Rgs UpperCut

[Mark Korda]

Hi Uppercut, I have an almost whole collection of the Speaker Builder mags. and several books that deal with sealed and vented enclosures. Your welcome to any info about that subject I can dig up for you.
   My favorite speakers and still are are the Dynacos from the  1970's. 3 models were both sealed and vented. The A-35, A-50, and the A-40XL my favorite pair I had to sell when I was broke. They all had a vent inside stuffed with fiberglass and held in by some heavy duty screen secured in the wood which made them vented but (Aperiodic) as Dyna called it. The vent went to a sealed chamber within the whole speaker cabinet making them sealed and vented.
    I have an article in Speaker Builder about that process that I could help you with.I have to go to work right now but would be glad to share any info I have to help your project......Mark Korda (kordamark@gmail.com) or 207-632-1648, I'm up all hours...Mark.

[stereocilia]

I don't have a contribution, but I wonder what you mean by sealed and vented. Are you talking about the kind of configuration like the old kef 104|2 with a vented chamber at the front of the sealed woofers flanking it?

[UpperCut]

Hi Uppercut, I have an almost whole collection of the Speaker Builder mags. and several books that deal with sealed and vented enclosures. Your welcome to any info about that subject I can dig up for you.
   My favorite speakers and still are are the Dynacos from the  1970's. 3 models were both sealed and vented. The A-35, A-50, and the A-40XL my favorite pair I had to sell when I was broke. They all had a vent inside stuffed with fiberglass and held in by some heavy duty screen secured in the wood which made them vented but (Aperiodic) as Dyna called it. The vent went to a sealed chamber within the whole speaker cabinet making them sealed and vented.
    I have an article in Speaker Builder about that process that I could help you with.I have to go to work right now but would be glad to share any info I have to help your project......Mark Korda (kordamark@gmail.com) or 207-632-1648, I'm up all hours...Mark.

Hi there,

What you describe does sound just like a sealed & vented compartment within an enclosure, but that is a normal way in many designs over the years yet both are separate so not communicating. The one I’m thinking of and which I have to 98% finished designing is interactive between both to get and use the best of both worlds (Sealed & Vented) for sound my reproduction.
I wanted just to find out if this had been done before, and of course IF – how, and maybe better then my idea? Presently I’m not as happy as yet with my 1.6 Rule and I wanted to use this idea as a stand alone as well as in one of my next larger projects as well.

[UpperCut]

I don't have a contribution, but I wonder what you mean by sealed and vented. Are you talking about the kind of configuration like the old kef 104|2 with a vented chamber at the front of the sealed woofers flanking it?

I like it a lot when people at leaast make an efford and think about things - so I like to thank you for your input, but sorry it is not it! rgs UpperCut

[mcgsxr]

4th order isobaric enclosure?

A sealed rear chamber with the sub in the middle, usually facing the ported chamber?

I built such a sub for my old Accord about 10 years ago.

Doubt that is it though!   

[UpperCut]

4th order isobaric enclosure?

A sealed rear chamber with the sub in the middle, usually facing the ported chamber?

I built such a sub for my old Accord about 10 years ago.

Doubt that is it though!   

Hi there,

Thanks a lot for the input and YES that looks quiet close yet it is not that what is needed BUT CLOSE! what I'm looking for is more usable for a MTM configuration, but could be also used with a sub. rgs UpperCut

[Duke]

The one I’m thinking of and which I have to 98% finished designing is interactive between both to get and use the best of both worlds (Sealed & Vented) for sound my reproduction.

I'm unable to visualize what you're describing, but obviously it's clear in your mind.  Any chance you could post a scan of a sketch or something like that? 

[UpperCut]

I'm unable to visualize what you're describing, but obviously it's clear in your mind.  Any chance you could post a scan of a sketch or something like that?

Hi there,

Thanks for your reply!
But at this point in time I will not part with to much info sorry as I'm still myself try to find more details of this quiet unusual build technique. Surely it won’t be long as it seems that nobody has heard about it a lot of people had good ideas yet nothing to close at all. I myself can't find anything on the net either not for month now so it looks even if somebody has build it previously that there is not much at all to find which is recorded!

rgs UpperCut

[Duke]

But at this point in time I will not part with to much info sorry as I'm still myself try to find more details of this quiet unusual build technique.

Okay, but I'm a bit confused.  It looks like you asked for help, but don't want to reveal just what you want help with. 

I have some experience designing speaker systems which use multiple compartments that can be either sealed or vented.  Let me know if you have a specific question and I'll try to answer it.

[UpperCut]

Okay, but I'm a bit confused.  It looks like you asked for help, but don't want to reveal just what you want help with. 

I have some experience designing speaker systems which use multiple compartments that can be either sealed or vented.  Let me know if you have a specific question and I'll try to answer it.

Thanks Duke,
I know your stand and work as I had a look at your profile & work weeks ago when I joined! So YES I'm only to happy when it comes to it. Now to clarify one item: I was asking if anybody heard about this type of technique or even had worked with it - I had no Intention to string anybody along so I was not in the first place intending to share prematurly because I wanted to know more about IF POSSIBLE to find out myself! simple to be sure about what their could have been - before sharing with all you other guys around the world.

I like that you are Interested in this and I can ensure you it is very Interesting, but sorry to say you are wrong in your assumtion that a sealed enclosure compartment is either sealed or not! A few month ago when this idea happen I was as sure as you because I would have never thought that it would be different, but it is !!! A fully sealed compartement can be Interactive with a vented compartement.

Presently my concern is only the 1.6 Rule, and with that the width of the enclosure corresponding to the height & length ETC. as when I will start building it I would like it as a stand alone as well as to fit into another project of mine as well! so I'm looking at 6.5" & 8" chassis to be used.
It looks like I will start building in about two to three weeks once I have finished off other scores of my last project! rgs UpperCut

[Mark Korda]

Hey Uppercut, I lost your gmail you sent me. I have found some articles that I will print out and send you from Speaker Builder tomorrow. I don't have a scanner/copier anymore. Could you send me your mailing address...thanks Mark Korda...kordamark@gmail.com    or 207-632-1648...I'm always around watching Jeopardy at 7.30 E.S.T. and am up all evening.

[UpperCut]

Hi there, I'm in New Zealand so I just got out of bed!!! here it is WebFlashArtistry@gmail.com thanks in advance rgs UpperCut

[Duke]

I like that you are Interested in this and I can ensure you it is very Interesting, but sorry to say you are wrong in your assumtion that a sealed enclosure compartment is either sealed or not!

I was referring to designs of my own; I make no assumptions about what you are doing.   I have designs with multiple compartments that can be either sealed or vented.   Plug the ports, that compartment is sealed.  Remove the plugs, that compartment is vented.

[UpperCut]

I was referring to designs of my own; I make no assumptions about what you are doing.   I have designs with multiple compartments that can be either sealed or vented.   Plug the ports, that compartment is sealed.  Remove the plugs, that compartment is vented.

Well, thanks Duke for your reply!

So here a couple of Images of the first cut Templates - very rough at this stage, and of course totally incomplete. rgs UpperCut