The Boominator - another stab at the ultimate party machine

[Saturnus]

Originally Posted by brummiejon

Hey stevodude, looking good, how does it sound?

Just spotted these on ebay.....



5W Solar Cell panel for diy boat motorcycle 12V Battery Charger Mono crystalline

http://bit.ly/YLFJw2

They look ideal......

BJ

They're crystalline though. On the facebook page http://www.facebook.com/theboominator?ref=hl there's a link to some suitable CIS cell solar panels at a reasonable price. I think I saw some similar 5W panels.

I strongly recommend amorphous/thin film/CIS type solar cells is you live below or above the 45th parallel or you want to integrate it in the top as crystalline cells need correct angular adjustment towards the Sun or you lose a lot of efficiency. Crystalline cells also lose a lot of efficiency with rising temperature. Crystalline also don't work very well in overcast conditions or when it's early morning/late afternoon.

Amorphous/thin film/CIS panels are heavier though as they need to be made of tempered glass.

[wy2quiet]

Originally Posted by Saturnus

They're crystalline though. On the facebook page http://www.facebook.com/theboominator?ref=hl there's a link to some suitable CIS cell solar panels at a reasonable price. I think I saw some similar 5W panels.

I strongly recommend amorphous/thin film/CIS type solar cells is you live below or above the 45th parallel or you want to integrate it in the top as crystalline cells need correct angular adjustment towards the Sun or you lose a lot of efficiency. Crystalline cells also lose a lot of efficiency with rising temperature. Crystalline also don't work very well in overcast conditions or when it's early morning/late afternoon.

Amorphous/thin film/CIS panels are heavier though as they need to be made of tempered glass.

I was JUST going to post about this. I got 20w of monocrystalline, and am trying to figure out a way to make the solar panels have an adjustable (angle) plate mounted on the top of the box. That or some mirrors.

[axebay]

Originally Posted by Saturnus

They're crystalline though. On the facebook page http://www.facebook.com/theboominator?ref=hl there's a link to some suitable CIS cell solar panels at a reasonable price. I think I saw some similar 5W panels.

I strongly recommend amorphous/thin film/CIS type solar cells is you live below or above the 45th parallel or you want to integrate it in the top as crystalline cells need correct angular adjustment towards the Sun or you lose a lot of efficiency. Crystalline cells also lose a lot of efficiency with rising temperature. Crystalline also don't work very well in overcast conditions or when it's early morning/late afternoon.

Amorphous/thin film/CIS panels are heavier though as they need to be made of tempered glass.

I believe that answers my question on whether EV-Power | Solar Panels GWL/Sunny Mono 20 Wp would work. But I'm not surprised since they were so cheap and giving 20W.
How important is it that the resistors connected to the piezos are 5W, elfa only has 3W.
They also have this https://www.elfa.se/elfa3~se_sv/elfa...6-00&toc=19191 , shouldn't be a problem hooking up one or two of the solar panels of the type you recomended on the facebook page?

[chris661]

Get twice the number of double or half the required value, parallel or series them (respectively). This'll give you 6w of resistor, at the correct value.

[aml417]

Hi
Im currently working on the design of my boominator. But I havent yet found what the baffle/baffle step actually is. FWIR I suspect that it is the width of the board that the speakers are mounted to, am I right? Also, how do i "calculate" the baffle?
As a third question I wonder how it comes that the port dont make sound at the tuning frequency the whole time music is playing, even though the music has no bass. Because any sound will cause the air inside the enclosoure to vibrate, which would make the port produce sound at the tuning frequency, isnt that true?
/André

[Saturnus]

Originally Posted by axebay

How important is it that the resistors connected to the piezos are 5W, elfa only has 3W.

I think I recommend 2W or 3W actually.

Anyways, it's not important at all. They could be 1W for that matter. It's only if you use an amp9 (or similar) amp that you'd need a 3W resistor.

[Saturnus]

Originally Posted by aml417

Because any sound will cause the air inside the enclosoure to vibrate, which would make the port produce sound at the tuning frequency, isnt that true?
/André

Why would you need to calculate baffle step? It's bipolar, so it does not in principle have baffle step, so there's no need to calculate it.

No. Sound is not vibrating air but air waves. The volume of air trapped in the port starts to resonate when a certain frequency is played. In principle the cones of the bass does not move or produce any sound at all at that frequency. Only the port makes the sound.

[HifiBoyDenmark]

Hey guys.
I've been thinking about buying a couple of Neutrik NTE4 for my halfinator, but how do i wire them up with my AMP6?

I've attached a photo of how i think it should be wired

Correct me if im wrong.

[aml417]

Originally Posted by Saturnus

Why would you need to calculate baffle step? It's bipolar, so it does not in principle have baffle step, so there's no need to calculate it.

No. Sound is not vibrating air but air waves. The volume of air trapped in the port starts to resonate when a certain frequency is played. In principle the cones of the bass does not move or produce any sound at all at that frequency. Only the port makes the sound.

Oh i see, well thanks for the quick answer! So I dont really need to consider the baffle thingy at all when im designing the box? Im building a boominator with only 2x HP 10 speakers

[Saturnus]

Originally Posted by aml417

Oh i see, well thanks for the quick answer! So I dont really need to consider the baffle thingy at all when im designing the box? Im building a boominator with only 2x HP 10 speakers

Not unless you have the 2x HP10W speakers on the same side. If you do then baffle step is 383hz.