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 Post subject: Re: Studio Build
PostPosted: Tue Jun 25, 2013 3:12 am 
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Joined: Thu Dec 02, 2010 8:03 pm
Posts: 239
Location: Suffolk, United Kingdom
Kirkyb wrote:
Hey Stuart!

They don't have the information to hand but will get someone to do it which should take a couple of weeks.

On another matter as im only permitted to go 2.5 metres high i will go down 1 metre, i have hired a structual engineer to design the retaining walls and roof which he says will need a rsj. I have broke up the old concrete which my shed was on, now its time to hire a skip.



Good plan ,thats what I did more or less so I'v ended up with finished ceiling height of around 2.8m :D

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 Post subject: Re: Studio Build
PostPosted: Mon Mar 24, 2014 1:37 am 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Hey guys!

Been away for awhile work and family commitments!

I finished the digging last year August (see photos attached), have ordered dense blocks, buildings sand, cement etc to get the external walls up.

Stuart, how have you been?

Adam audio never did get back to me with the polar plots :(


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 Post subject: Re: Studio Build
PostPosted: Thu Mar 27, 2014 4:54 am 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Guys,

can anyone please let me know how much weight my roof can take?

Please see the structual engineers calculations below.

Kind regards!


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 Post subject: Re: Studio Build
PostPosted: Mon Mar 31, 2014 4:52 am 
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Joined: Tue Feb 18, 2014 7:20 am
Posts: 14
Location: Seattle, WA
Soundman2020 wrote:
Quote:
The only thing is i don't know what i'm looking at
Me either! That's not what I expect from a diagram for dispersion angle.... Doesn't even say if that is vertical or horizontal! :shock: What I was hoping for is a set of polar plots for different frequencies. That single graph is not much use at all...

And I certainly find it hard to believe that the total dispersion pattern at 20 kHz is practically the same on-axis as 15° off axis... :!: :shock: :shock: :roll:

Still, being aware of the lousy documentation provided by Adam in general, this is not unexpected. In fact, it's rather surprising that they sent you anything at all!

I wonder why they are so darn closed to providing any useful technical details of their speakers. It almost makes you wonder what they are hiding....

- Stuart -


I would guess that they are hiding the transition from piston driver to AMT which has a drastically limited vertical dispersion compared to the cone driver. The "ART" is just their version of a traditional air motion transformer. Could be useful in a studio environment, but rest assured there is no graceful transition between the two. In order to smooth the vertical dispersion transition between the two they would need to have a fairly shallow slope in the crossover which has the potential of creating harmonic distortions, unless they move the crossover point down to the middle of the vocal range, which is not desirable, especially since a shallow slope also creates phase distortions. There is no way to match the phase over a band of overlapping frequencies between a piston driver and AMT. They require a fairly steep crossover - third or fourth order - to avoid such problems, which brings us back to the problem with dispersion.
The AMT acts almost like a mini line array, which means it would need to be a bit shorter to widen the vertical response.
On another note, I'm actually not surprised by the consistency of the frequency response. A good AMT is quite consistent on the horizontal plane, and Adam make a pretty good AMT (or modify, more likely).

I must say that Adam speakers sound pretty fantastic - I owned a pair for awhile - and they likely don't want to scare off the potential customers who would raise a brow at the graphs. We are engineers, after all.

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 Post subject: Re: Studio Build
PostPosted: Sat Apr 05, 2014 11:04 pm 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Hey post78,

Thanks for sharing your knowledge!

Do you think it is worth soffit mounting these speakers? If so how would i raytrace without having the polar plots?

Thanks


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 Post subject: Re: Studio Build
PostPosted: Mon Apr 07, 2014 2:07 pm 
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Joined: Thu Aug 21, 2008 10:17 am
Posts: 11973
Location: Santiago, Chile
Quote:
Do you think it is worth soffit mounting these speakers? If so how would i raytrace without having the polar plots?
Absolutely! They sound (and test) spectacular when properly soffit mounted.

You don't need the polar pattern to ray-trace... It would be useful to have, but isn't essential.

- Stuart -

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 Post subject: Re: Studio Build
PostPosted: Mon Apr 07, 2014 6:38 pm 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Quote:
You don't need the polar pattern to ray-trace... It would be useful to have, but isn't essential.

- Stuart -
[/quote]

Thanks Stuart appreciate that, I've been reading the forum on soffit mounting and ray tracing for quite some time now :)

I've got a few questions for you guys. I know your busy and I appreciate all the help you give!

How would i ray-trace without the plots?

Do I go with 1 super door? As I want to save as much room as possible but if I go for a double door they would both have to open inwards meaning I would have to lose around a meter to stop the first door from hitting the second.


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 Post subject: Re: Studio Build
PostPosted: Tue Apr 08, 2014 1:38 pm 
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Joined: Thu Aug 21, 2008 10:17 am
Posts: 11973
Location: Santiago, Chile
Quote:
How would i ray-trace without the plots?
Just assume that each successive angled ray represents a lower frequency than the one next to it. So the rays close to the axis are high frequencies mostly, and those that are way off-axis are lower frequencies, and therefore longer wavelengths.

Quote:
Do I go with 1 super door? As I want to save as much room as possible but if I go for a double door they would both have to open inwards meaning I would have to lose around a meter to stop the first door from hitting the second.
Could you make one of them a slider? If not, then maybe a "superdoor" would be a good solution.

- Stuart -

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 Post subject: Re: Studio Build
PostPosted: Sat Oct 06, 2018 3:54 am 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
I'm still in the process of building the studio due to family issues and work. Will hopefully have it very soon.


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 Post subject: Re: Studio Build
PostPosted: Sat Oct 06, 2018 4:07 am 
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Joined: Wed Feb 01, 2017 6:03 pm
Posts: 1038
Location: St. Albert, Alberta, Canada
Quote:
I'm still in the process of building the studio due to family issues and work. Will hopefully have it very soon.

Any progress pictures to share? I doubt it's still a hole in the ground!!!

Greg

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It appears that you've made the mistake most people do. You started building without consulting this forum.


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 Post subject: Re: Studio Build
PostPosted: Sat Oct 06, 2018 4:25 am 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Hi Greg

You're absolutely correct! It's not just a hole in the ground anymore :)

I aquired the services of Stuart who is designing it, just waiting on the final design as we speak.

I'll post some photographs up very soon.


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 Post subject: Re: Studio Build
PostPosted: Mon Oct 08, 2018 7:00 pm 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Progress pictures!


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 Post subject: Re: Studio Build
PostPosted: Fri Oct 12, 2018 4:29 am 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Hi Stuart,

Any updates on the design?

I've sent you various pm's but I don't believe you are receiving them?

Kind regards

Kirk


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 Post subject: Re: Studio Build
PostPosted: Fri Oct 12, 2018 5:42 am 
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Joined: Thu Aug 21, 2008 10:17 am
Posts: 11973
Location: Santiago, Chile
Quote:
I've sent you various pm's but I don't believe you are receiving them?
I've got a whole bunch of PM's that I need to catch up on: Yours are probably in there too! I'll take a look, and get back to you...

- Stuart -

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 Post subject: Re: Studio Build
PostPosted: Tue Oct 16, 2018 2:36 am 
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Joined: Thu Apr 04, 2013 1:12 am
Posts: 18
Location: London
Thanks Stuart!


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