Battery Powered Sound System

This topic has 38 replies, 11 voices, and was last updated October 17, 2007 at 9:03 pm by Tocooltom.

Viewing 14 posts - 26 through 39 (of 39 total)

← 1 2

Author

Posts
August 7, 2005 at 1:10 pm #1061506
DrBobski
Participant
Hi GL,

Why in the world would you want to make a petroleum based fuel?

Using naptha or any other petroleum/mineral based fuel is illegal or at the very least excise is due on any such fuels, imagine the paper work, regulation checks, insurance, public liability etc.

In short yes it would work, although i’ve no idea if recipe is exactly the same at this stage. It could in theory make it a little more volatile (less stable). The flash point may also increase making nearer petroleum based derv, about 180 degrees farenheit, veggie oil or bio-deisel has a flash point of 350 degress farenheit. Veggie oils is also more bio-degradable (think spills, longterm effects etc). Toxicity is also down if ingested or inhaled.

My advise
Use Turpentine or dont do it at all, also dont try and sell this stuff either, legal implication are quite severe.
August 8, 2005 at 10:01 pm #1061517
General Lighting
Moderator
DrBobski wrote:

Hi GL,

Why in the world would you want to make a petroleum based fuel?

Using naptha or any other petroleum/mineral based fuel is illegal or at the very least excise is due on any such fuels, imagine the paper work, regulation checks, insurance, public liability etc.

if myself or any of our crew were making this on a large scale (for our personal use) we’d certainly use turpentine as you suggest (and for all the reasons mentioned above) the only reason I thought of the naptha is that I had a quantity of it left over from some DIY work.. but I understand what you are getting at.

ISTR an incident where one of the “max power” type magazines was printing info on how to make biodiesel and it caused a rash of people doing it just to save cash rather than the positive environmental reasons – they were using some questionable mixtures of oils and making ropey and dangerous “home brew” setups – many got caught by the Environment Agency as well as Revenue and Customs as they were causing more pollution!

Incidentallly I checked on HM Revenue and Customs website and their latest press release says duty is payable on all fuels used to power road vehicles, including biodiesel; but its less than you would pay for petroleum based fuels. You also have to declare the vehicle you are filling up with the stuff on a form (presumably you get some certificate from them you can produce if stop-checked) and if you are making your own road fuel to declare to HMR&C how much you are producing

but you don’t have to do any of this if its fuel for gensets or boat engines.

which seems fair enough IMO as any road vehicle creates some pollution and cost to the public whatever you run it on, so its only trying to recover some costs that are supposed to compensate the public purse for the impact of the vehicle.

if we started making it in any quantity, even for personal use I’d be pefectly happy to be 100% legit about everything, to work constructively with the authorities and ensure safety precautions are followed to avoid danger to people and environmental contamination….
August 9, 2005 at 2:56 pm #1061507
DrBobski
Participant
:cyclop_1: Hi All

Thanks for info on regulation of fuels GL i’ll make a note of that. I would imagine if you were to sit down and think about this one, you could develop good, safe and practicle methodology for ongoing bio-fuel manufacture.

Think spills (even small) dont wanna contaminate your backyard. Think about the smeg, what are you gonna do with it? etc Think safe storage, suitable vessels etc. Suitable fire extinguisher handy in store. Proctective clothing (gloves, goggles, boots not yer best trainers) and ventilation. You might even have to think about security.

Like you say GL even if you have to register and pay some duty, it’s still cheaper if it’s for your own use on the road. And a helleva lot cheaper if in gensets….. :group_hug
April 3, 2006 at 11:41 pm #1061531
Raj
Participant
you could use 12v if you were prepared to totally rewire your amps as they convert the 240ac to dc before amplifying the music; if you pick your amps carefully you could make sure that the ac becomes 12vdc and hey presto{technical skill is required; definetely not for the novice this} not the biggest soundsystem however

would mean that the innefficient change from ac to dc is avoided so you would save a largish amount of power [conversion is usually only 60-70% efficient; possible to lose up to 50% of power as heat]

however when designing a power supply that can supply a large amp you need special batteries (deep charge) which can deal with a wildly fluctuating drain and possibly up to 200v for a single 1kw amp….[roughly about 80v per speaker load which you add 20-30% for losses]
this would require a battery bank of several batteries and these babies are not cheap; the more batteries you add to the bank in series the more resistance there is from them to that flow of current so back to a horribly innefficient power supply and also dc power at this level is usually fatal…

where has my generator got to…
July 31, 2006 at 1:21 pm #1061526
Signal Jammer
Participant
Yeah these dudes http://www.sense3d.com/nautilus.html seem to be doing something like it. They did the Bestival last year and some carnivals from what I can see. Seem to have a really good idea on there hands as well as making the system a look interesting! :groucho:
August 1, 2006 at 2:45 pm #1061529
noname
Participant
Signal Jammer wrote:

Yeah these dudes http://www.sense3d.com/nautilus.html seem to be doing something like it. They did the Bestival last year and some carnivals from what I can see. Seem to have a really good idea on there hands as well as making the system a look interesting! :groucho:

System speaker design comes from http://www.speakerbuilding.com

Go to the pages for the Ammonit for design notes etc.

Brilliant idea though – very efficient design, and would allow a lot of acoustic power to be generated for relatively little cost in electrical power…raaaraaaraaa
August 1, 2006 at 8:29 pm #1061527
Signal Jammer
Participant
noname wrote:

System speaker design comes from http://www.speakerbuilding.com

Go to the pages for the Ammonit for design notes etc.

Brilliant idea though – very efficient design, and would allow a lot of acoustic power to be generated for relatively little cost in electrical power…raaaraaaraaa

oooh rrrr! Nice to read up on that thanks for the linkage 🙂

R u anything to do with them?

We have some puppies that have been designed by us below but to be used on more regular juice sucking amps!! Cant wait to get em out there!:devilish:
August 1, 2006 at 8:31 pm #1061532
Raj
Participant
man they look wicked

how do they sound?
:groucho::groucho::groucho:
August 1, 2006 at 8:47 pm #1061528
Signal Jammer
Participant
unbelievable!!!!

the concept was to have as big a system as possible but to fit in 2 x cars so we didnt have to get a van. We managed to get it down to 6k :horay: But we have had to add another bin to each side for the bass so it actually looks like the pic but with 3 bins per side. It’s been designed and built by a top of the scale speaker creator and as said is shockingly good, it is like n othin you have heard from an outdoor rig of its size :devil_wag

We just need to get them out there, havent had a chance to with all the probs with partays (tek etc)….need private init!
August 1, 2006 at 9:06 pm #1061524
globalloon
Participant
Signal Jammer wrote:

unbelievable!!!!

the concept was to have as big a system as possible but to fit in 2 x cars so we didnt have to get a van. We managed to get it down to 6k :horay: But we have had to add another bin to each side for the bass so it actually looks like the pic but with 3 bins per side. It’s been designed and built by a top of the scale speaker creator and as said is shockingly good, it is like n othin you have heard from an outdoor rig of its size :devil_wag

We just need to get them out there, havent had a chance to with all the probs with partays (tek etc)….need private init!

i can vouch for that… althought I’ve only heard them indoors… they rip it up

nicely
August 9, 2006 at 11:19 pm #1061530
noname
Participant
Signal Jammer wrote:

oooh rrrr! Nice to read up on that thanks for the linkage 🙂

R u anything to do with them?

We have some puppies that have been designed by us below but to be used on more regular juice sucking amps!! Cant wait to get em out there!:devilish:

Nah, just a site I’ve had in my bookmarks for a while…

Look like rocking boxes…raaaraaaraaa

Glad to see other people going for the short throws for party rigs as well (I get a bit fed up hearing rigs that have only long throw for bottom end – you can’t hear the bass up close, but some bugger a mile down the road is going apoplectic cos all he can hear is beats on the wind…:you_crazy:you_crazy:you_crazy)
January 7, 2007 at 3:38 pm #1061502
Anonymous
caine wrote:

does anyone have any ideas or plans on how to build a battery powered system?

i know of some one who uses 8 car batteries at 12v converted to power decks lights mixer and PA for up to 2 days, but cant contact them to find out how!

any ideas?

I’ve seen it done and my ex djed on it. Useing an inverter is the best option though.
January 22, 2007 at 1:13 pm #1061503
Anonymous
this is a litle set of speakers i made that could be cared round on a strap and thay all fit inside each outher
thay run of a 250w car amp and 4 12v baters
[IMG]http://i37.photobucket.com/albums/e96/freeytrap/12v.jpg?t=1169471400[/IMG]
October 17, 2007 at 9:03 pm #1061533
Tocooltom
Participant
I saw a guy at eastern haze with wot was basicly a kart with a few batteries in it with two 15″ subs on the side and decks on the top, he jus walked around parked himself by a burger van or sumit and then put on sum tunes, he played alot of psytrance and hard trance, i fink i saw him in the night wit a lil mosh goin on infront of his kart lol, but im not quite sure if that was real coz i was trippin lol:bounce_fl

I have run a lil 1K stack off a car battery with a power converter, was quite funny driving to the side of a river near my villige and gettin a few speakers out of the car on a sunday afternnon for lil dance lol
Author

Posts