First post: Questions regarding ALTEC 612 enclosure - DIY

[Tralalalala]

Hi again,

There is a cutout template on this site : Vintage Altec 15 & 16 inch Speaker Mounting Template
Is this what you think of GM when you mean a driver cutout chart ?

I do not have the tools to determine anything of TS parameters and so on... - I have just been a little bit into Vb and so on when buying a pair of very small tang band speakers I built some enclosures to.

SO: If I understand you correctly Alien_Shore this is what I should do:

1. hook up my Altec Duplex 604E?s (without enclosures of any kind) with the crossovers I?ll use and to the amplifiers I will use in the setup.
2. add a computer with a program like the DATS or WT2 as signal source - then figure out the TS parameters and so on.

Then I?ll get very exact measurements - tailored for my setup - correct ?

I?m just trying to understand - this is new for me. again: if I?m off in my assumptions please let me know.


- Tralalalala

[Tralalalala]

OK - have not read much yet, but have seen pictures of the DATS program ...
Guess that I?m wrong in my previous assumptions.

It looks like I will only need to hook up the 604E?s directly through a usb/audio cable to a computer.

My 604E?s has gone through some major surgery at GPA.
They were in a bad shape, anyway: do you think that it?s worth the effort in asking if they got these parameters on my 604E?s.

- Tralalalala

[VolvoHeretic]

I think you should stretch the height dimension to 42" tall which would give an internal volume close to 9 cu. ft. after bracing, raise the speaker closer to ear level, and nobody would ever notice you fudged the dimensions. And then of course, paint them gloss piano black.

[Alien_Shore]

OK - have not read much yet, but have seen pictures of the DATS program ...
Guess that I?m wrong in my previous assumptions.

It looks like I will only need to hook up the 604E?s directly through a usb/audio cable to a computer.

My 604E?s has gone through some major surgery at GPA.
They were in a bad shape, anyway: do you think that it?s worth the effort in asking if they got these parameters on my 604E?s.

- Tralalalala

Mine as well. I recently picked up a 604E on ePay that had a torn cone. I sent it off to GPA for recone, magnet recharge, and new diaphragm in the HF. Everything came back looking great, albeit they used 8 ohm voice coil in the woofer and 8 ohm diaphragm in the HF.

Yes, you're right about the DATs - you simply hook it up directly to your speaker and it will do all the math for you, and show you the T/S parameters for your speaker. You can see some details in this thread here. These parameters will help you determine the right size cabinet you'll need, how big the port should be, etc. The parameters are really just starting points though, you'll need to use your ears to fine-tune things to what is just right for you.

I'm following along your thread with great interest because I am getting ready to build a cabinet for my 604E as well. I am trying to decide if a smaller utility cabinet will work, or should I go with bigger like the Stonehenge III -type cabinet.

[Tralalalala]

Thanks Alien_Shore for thumbs up on the thread : )


I do not know if there any sense in posting my latest update of drawings of cabs because I do have the correct tools to do calculations now...
, BUT this is the closest I get right now to a 612C enclosure that has the iconic cab front - a front that I like very much.... : )


I?ve asked before , but have yet not gotten any answer on the question:

Does anybody know what dimensions on the side braces and on the brace that goes across the whole enclosure in 612C cabinet?


I can read my uploads fine on my computer when seeing them online, can you? If not I have to do as the rest of you guys and join the conservation on uploading of pictures to this site... ; )

- Tralalalala

[GM]

I do not know if there any sense in posting my latest update of drawings of cabs because I do have the correct tools to do calculations now...

Does anybody know what dimensions on the side braces and on the brace that goes across the whole enclosure in 612C cabinet?


I can read my uploads fine on my computer when seeing them online, can you?

Because it would be nice to have a composite drawing for folks to refer to and/or use to DIY a cab for their app.

Someone with a 612C cab would have to measure them as Altec used many different sizes of bracing over the decades from full size 1x1", 2x2" to their reduced 3/4 x 3/4", etc. sizes or switched to 3/4x2-1/2" placed on edge to replace either.

If I open it in a new tab I can blow it up to just barely read the dimensions on this brand new 'HD' LED monitor. All those black dims, arrows, lines all scrunched up against a medium dark blue/gray background gives me an instant headache.

GM

[Tralalalala]

If I open it in a new tab I can blow it up to just barely read the dimensions on this brand new 'HD' LED monitor. All those black dims, arrows, lines all scrunched up against a medium dark blue/gray background gives me an instant headache.

GM

Thanks for sharing the dimensions GM, helped a lot.

Anyway: will try to upload the last sketch through imageshack.

I can probably make a print especially for you GM if you still find the blue background color annoying...



Uploaded with ImageShack.us

- Tralalalala

[Altec Best]

I can probably make a print especially for you GM if you still find the blue background color annoying...

Another helpful move I think would be to increase the size of the font..As GM noted the arrows and numbers are very hard to see (Too Small). What are you using to draw up the plan ?

[GM]

There is a cutout template on this site : Vintage Altec 15 & 16 inch Speaker Mounting Template
Is this what you think of GM when you mean a driver cutout chart ?

Correct.

GM

[Altec Best]

Your Welcome ! It was my pleasure ! Hope your project comes out as planned.. Looking forward to your progress. What is your time frame like on building these ?