- #1
slick_willy
- 21
- 2
Hey guys so I have had this idea for an electronics project for a long time, and it basically goes like this.
It's a floating speaker box for floating on the river when we are rafting. Design considerations are that it would have to be unsinkable (as much as possible), also loud and with a longish battery life for its given operational specs. Here's about where I am at with it:
My current design would be an ice chest enclosure which houses 2 speakers (probably 6", maybe 6x9" if feasisble.) These speakers are mounted from the inside of the ice chest, and only the cones would be exposed from the outside. This means it would be important to keep the whole shebang orie tated peoperly (right side up) to avoid potential problems with leakage or speaker damage from too much water. These will be marine speakers (although some most car audio door-mount speakers are designed to operate in rainy conditions since rain which does not get redirected away from your window's weather stripping would end up dropping water on the door speaker itself. That is a possible area for improvement in the design bht that's my current plan.
Now, completely inside the ice chest enclosure would be the 12v 2-channel amplifier and a 12v rechargeable battery. Also the music source would be in here as well... I was thinking of using a cheap mp3 player like a Sandisk sansa or something like that which offers good memory storage capacity for cheap. This way, all the essential electronics would be kept fully dry, and I could just throw my music on random and float down the river while BLASTING some feel good tunes as loudly and effixiently as possible.
Design considerations would be things like making sure that the box is completely watertight sealed comma that the balance of the unit as a whole would keep it orientated correctly in the water as best as possible, and also using some kind of lightweight foam to make sure that the ice chest with float even if it did fill with water God forbid.
So this is my first issue... does anyone have any suggestions on improvements or tips on things I may have overlooked in this design? All replies are welcome.
And secondly (and lastly) I was looking at using components similar to these:
12V rechargeable 7 Ah battery-
https://www.amazon.com/dp/B002QGVWBW/?tag=pfamazon01-20
11Vdx Kenwood amp at 75w x 2 channels rms
So by my calculation, trying to get a rouvh estimate of how the battery would fare, if I am drawing say 150w to power the speakers, let's assume that the amp itself draws 150w rms at high volume. At 12 volts dc, it seems like using watts law, 150w /12 volts is about 12.5ish amps.
So id the battery I linked to offers 7 Ah, and this system would require 12.5AMPS, then dead battery when only last for a little bit over and half an hour before dyingm. Is thay correct or am Inmissing something?
Thanks thus
It's a floating speaker box for floating on the river when we are rafting. Design considerations are that it would have to be unsinkable (as much as possible), also loud and with a longish battery life for its given operational specs. Here's about where I am at with it:
My current design would be an ice chest enclosure which houses 2 speakers (probably 6", maybe 6x9" if feasisble.) These speakers are mounted from the inside of the ice chest, and only the cones would be exposed from the outside. This means it would be important to keep the whole shebang orie tated peoperly (right side up) to avoid potential problems with leakage or speaker damage from too much water. These will be marine speakers (although some most car audio door-mount speakers are designed to operate in rainy conditions since rain which does not get redirected away from your window's weather stripping would end up dropping water on the door speaker itself. That is a possible area for improvement in the design bht that's my current plan.
Now, completely inside the ice chest enclosure would be the 12v 2-channel amplifier and a 12v rechargeable battery. Also the music source would be in here as well... I was thinking of using a cheap mp3 player like a Sandisk sansa or something like that which offers good memory storage capacity for cheap. This way, all the essential electronics would be kept fully dry, and I could just throw my music on random and float down the river while BLASTING some feel good tunes as loudly and effixiently as possible.
Design considerations would be things like making sure that the box is completely watertight sealed comma that the balance of the unit as a whole would keep it orientated correctly in the water as best as possible, and also using some kind of lightweight foam to make sure that the ice chest with float even if it did fill with water God forbid.
So this is my first issue... does anyone have any suggestions on improvements or tips on things I may have overlooked in this design? All replies are welcome.
And secondly (and lastly) I was looking at using components similar to these:
12V rechargeable 7 Ah battery-
https://www.amazon.com/dp/B002QGVWBW/?tag=pfamazon01-20
11Vdx Kenwood amp at 75w x 2 channels rms
So by my calculation, trying to get a rouvh estimate of how the battery would fare, if I am drawing say 150w to power the speakers, let's assume that the amp itself draws 150w rms at high volume. At 12 volts dc, it seems like using watts law, 150w /12 volts is about 12.5ish amps.
So id the battery I linked to offers 7 Ah, and this system would require 12.5AMPS, then dead battery when only last for a little bit over and half an hour before dyingm. Is thay correct or am Inmissing something?
Thanks thus
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