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Topic with many replies

Create your own festival stereo


Author Message
Written on: 18.08.2011 15:46
Lars
Posts: 4
thanks icon_biggrin.gif helped a lot icon_smile.gif
Written on: 19.08.2011 12:02
Lars
Posts: 4
So we've decided to build half a boominator (with a variant in the piezo's). Since one of the demands were that the box could last the entire week (or at least on one or two recharges), I have to make sure my calculations are right. Previosly in the thread you, saturnus, calculated it for someone, with the exact amp that we're using, with these numbers.

On 4 ohm the amp draws 350 mA on max volume, and if we use a traction batteri, with 22 Ah (the lowest we can go, without it being either too expensive or too small an amount)we would be able to hold for

22*2/0,35 = 125 hours

you also wrote that with 8 ohm it'll be twice as long, in other words about 250 hours which equals to about ten days icon_eek.gif are my calcuations correct or am I doing something wrong icon_smile.gif

the variant in piezo's are one of these two models

http://www.ljudia.com/hogtalarelement-s82124/piezo-c78561/qlm-1005-p78564/

http://www.ljudia.com/hogtalarelement-s82124/piezo-c78561/rila-sa38-piezo-p402323/

Can they be used ? icon_smile.gif

[This article was edited 1 times, at last 19.08.2011 at 12:09.]
Written on: 05.09.2011 14:02
Ruben
Posts: 69
Lars wrote:

So we've decided to build half a boominator (with a variant in the piezo's). Since one of the demands were that the box could last the entire week (or at least on one or two recharges), I have to make sure my calculations are right. Previosly in the thread you, saturnus, calculated it for someone, with the exact amp that we're using, with these numbers.

On 4 ohm the amp draws 350 mA on max volume, and if we use a traction batteri, with 22 Ah (the lowest we can go, without it being either too expensive or too small an amount)we would be able to hold for

22*2/0,35 = 125 hours

you also wrote that with 8 ohm it'll be twice as long, in other words about 250 hours which equals to about ten days icon_eek.gif are my calcuations correct or am I doing something wrong icon_smile.gif

the variant in piezo's are one of these two models

http://www.ljudia.com/hogtalarelement-s82124/piezo-c78561/qlm-1005-p78564/

http://www.ljudia.com/hogtalarelement-s82124/piezo-c78561/rila-sa38-piezo-p402323/

Can they be used ? icon_smile.gif


First of all. If you're building the half boominator, you're running a system of 8 ohm impedance (unless you specifically choose speakers with 4 ohm impedance and thus the design will look very different). 8 ohm instead of 4 ohm means that you will only play half as loud and also use half the power.

That said - the average power consumption of the AMP6B in 4 ohm is 4,4 W. I think it's about 2,4 W in 8 ohm (not sure about this one). The average consumption might be higher if you're using an amplifier from ebay with a LED lightbulb, but I'll assume that you're using the AMP6B.

Also note that using a car battery will cut away 1/3 of the capacity when draining the battery completely. Use a SLA (sealed lead acid) battery instead.

The equation will then look like this:
battery amp hours * voltage / power = hours
22 Ah * 12 V / 2,4 W = 110 hours

NOTE: This is IF the average consumption is 2,4 W, which I don't know for sure (though I think it's around that).

This should give you an idea of how long your battery will last when JUST playing music. And remember this is at maximum volume. So it should work a whole festival.
Written on: 10.10.2011 13:48
Daniel
Posts: 1
Jim Daggerthuggert wrote:

Google: led 12v sound

Find stuff like: http://www.fiberopticproducts.com/Sound_to_light.htm or http://www.ultraleds.co.uk/audio-strip-controller-p-2080.html

- You just need to add led's to these controllers. I can do this and I have no electronics skills.


Thanks for sharing those links, they're exactly what LED light I'm after.
Written on: 18.11.2011 11:18
Hegner
Posts: 25
Hello people, I have a little problem with my choice of amplifier.

Our camp has had a lot of different stereo system, but this year we planned to do a little extra out of it.
Therefore, we have now bought a Cerwin Vega TS-42 and some active speakers.
But we do not know what amp we have to choose! Here is some information about the TS-42: Frequency Response:-3dB 35 Hz - 215 Hz /-10dB 33 Hz - 230 Hz
Power Capacity: 1000W RMS / 2000W Program / 4000W Peak
Recommended Power: 1500 w - 2000 w @ 8 ohms
Input Connectors: (2) Neutrik Speakon
Sensitivity (1W/1m): 108 dB
Nominal Impedance: 8 ohms
Maximum SPL: 144 dB

Thank you.
Written on: 18.11.2011 12:15
Phaedras
Posts: 42
Hegner wrote:

Hello people, I have a little problem with my choice of amplifier.

Our camp has had a lot of different stereo system, but this year we planned to do a little extra out of it.
Therefore, we have now bought a Cerwin Vega TS-42 and some active speakers.
But we do not know what amp we have to choose! Here is some information about the TS-42: Frequency Response:-3dB 35 Hz - 215 Hz /-10dB 33 Hz - 230 Hz
Power Capacity: 1000W RMS / 2000W Program / 4000W Peak
Recommended Power: 1500 w - 2000 w @ 8 ohms
Input Connectors: (2) Neutrik Speakon
Sensitivity (1W/1m): 108 dB
Nominal Impedance: 8 ohms
Maximum SPL: 144 dB

Thank you.


What kind of active speakers have you bought? Active speakers have a built in amp which is probably not very efficient and needs a lot of power (not a great thing when running on batteries at a festival)

For the Sub you could use a class-d mono sub amp like this:
http://www.ebay.com/itm/Kicker-100-RMS-Class-D-Amplifier-Subwoofer-1ohm-Sub-Amp-/300511531184?pt=Car_Amplifiers&hash=item45f7e210b0#ht_1369wt_932

It puts 53w rms into 8ohm and has a low pass filter at 150hz..
Written on: 18.11.2011 15:05
Hegner
Posts: 25
Phaedras wrote:

Hegner wrote:

Hello people, I have a little problem with my choice of amplifier.

Our camp has had a lot of different stereo system, but this year we planned to do a little extra out of it.
Therefore, we have now bought a Cerwin Vega TS-42 and some active speakers.
But we do not know what amp we have to choose! Here is some information about the TS-42: Frequency Response:-3dB 35 Hz - 215 Hz /-10dB 33 Hz - 230 Hz
Power Capacity: 1000W RMS / 2000W Program / 4000W Peak
Recommended Power: 1500 w - 2000 w @ 8 ohms
Input Connectors: (2) Neutrik Speakon
Sensitivity (1W/1m): 108 dB
Nominal Impedance: 8 ohms
Maximum SPL: 144 dB

Thank you.


What kind of active speakers have you bought? Active speakers have a built in amp which is probably not very efficient and needs a lot of power (not a great thing when running on batteries at a festival)

For the Sub you could use a class-d mono sub amp like this:
http://www.ebay.com/itm/Kicker-100-RMS-Class-D-Amplifier-Subwoofer-1ohm-Sub-Amp-/300511531184?pt=Car_Amplifiers&hash=item45f7e210b0#ht_1369wt_932

It puts 53w rms into 8ohm and has a low pass filter at 150hz..
53w rms?! it needs like 1000 watt rms?
Written on: 18.11.2011 17:53
Saturnus
Posts: 3048
And you got a portable Zero-Field Energy module handy? Seriously, 1000Wrms would suck a standard car battery dry in an hour or max 2. Forget that idea.
Written on: 18.11.2011 20:07
Rasmus123
Posts: 108
http://img195.imageshack.us/img195/5157/anlgfrdigtroskilde.jpg

Our speaker of 2011 Roskilde... Did you hear it ?

Like the design ?


Thanks for a wonderfull 2011

Thanks to Saturnus and others for the help, see ya 2012.
Camp: Sort Tavle L95

Video of the speaker beeing build:

https://www.youtube.com/watch?v=llLS_k0QwOY

[This article was edited 8 times, at last 25.11.2011 at 14:48.]
Written on: 19.11.2011 16:31
Hegner
Posts: 25
I live in Vor Frue, and we are planing to camp in area L, so a lot of car batterys are not a problem icon_smile.gif we got chargers, plus a 60w solar planel at our camp. And we are running with battery packs with 6 60ah batterys in a parallel connection, and one pack with 8-10 75 ah batterys.

But Saturnus do you have any idea then? We want a big speaker system, can you make a plan for us?
Written on: 19.11.2011 16:40
Hegner
Posts: 25
We got around 30.000 DKK to build it for.
Written on: 20.11.2011 13:31
Rasmus123
Posts: 108
But Saturnus do you have any idea then? We want a big speaker system, can you make a plan for us?

We got around 30.000 DKK to build it for.



The speaker above total cost = 3200 kr... And it plays till your ears pop... 80% of it is the design, i dont think you need to spent 30.000 DKK to get a good big speaker system...



[This article was edited 1 times, at last 20.11.2011 at 13:32.]
Written on: 20.11.2011 15:55
Hegner
Posts: 25
Rasmus123 wrote:

But Saturnus do you have any idea then? We want a big speaker system, can you make a plan for us?

We got around 30.000 DKK to build it for.



The speaker above total cost = 3200 kr... And it plays till your ears pop... 80% of it is the design, i dont think you need to spent 30.000 DKK to get a good big speaker system...


we wanna have a BIG stereo, with mind blowing bass, it has to be a concert ón wheels icon_smile.gif not just a "normal" Roskilde stereo icon_smile.gif
Written on: 20.11.2011 18:00
Saturnus
Posts: 3048
Have you talked with Roskilde Festival about getting permission for that and where you will be allowed to camp?
Written on: 20.11.2011 23:22
Hegner
Posts: 25
Jeg tager den lige på dansk her.

Fik måske overdrevet lidt da jeg skrev en koncert på hjul. Men vi vil gerne have et anlæg hvor folk kan mærke bassen, og få en fed oplevelse icon_smile.gif Det skal ikke være MONSTER stort, men det skal være stort og kunne skabe en ordenlig fest icon_smile.gif

Nu har jeg læste lidt om "the boominator", og snakket med drengene, vi kunne godt tænke os at bygge det efter nogen de principper du har designet TB Saturnus, altså med lavt strøm forbrug solfangeren og god lyd, bare i en lidt større klasse. Er det noget du vil hjælpe med?
Written on: 21.11.2011 19:35
Saturnus
Posts: 3048
If it's just going to be a big box of speakers and there's no original concept behind it then I don't really have any desire to get involved. Plenty of people that will over at www.roskilde-open.dk though.

If you have an original concept then I can probably be convinced (with the promise of beer) to get involved. So what's your fancy? A TIE fighter model, a giant frog, or an oversized beer can?

Just remember that for example the Coffin concept is already done.
Written on: 22.11.2011 07:53
Hegner
Posts: 25
Det ville sku være lidt kedeligt bare at bygge en firkantet kasse.

Hvis vi havde evnerne havde vi bygget en rullende "orange scene". Men det vi hælder mest til ligenu, er at bygge et kørende orange Tuborg mærke.
med fronten op af, så ville vi monterer 6-8 12" subs/bass højtalere, hvor halvdelen af dem skal sidde i bunden på kassen. Og evt en 360 graders højtaler tårn.

[This article was edited 1 times, at last 22.11.2011 at 23:01.]
Written on: 22.11.2011 14:55
Saturnus
Posts: 3048
How about making the Tuborg logo into a pole dancing platform with wheels in each corner of the "label" part. Then the "crown" part could be a raised table for the DJ.

If it's 120cm wide then it'll be roughly 170cm long in total. The pole dancing platform would have to be about 20cm thick then it'll have internal space enough to house 2 (or max 3, but not 6 or icon_cool.gif 12" subwoofers.

On top of the pole you could place an omni-directional sattelite similar to the one I've designed for Coffin Camp. In fact the entire sound system will be identical, more or less, to next years version of the Coffin Blaster, just in a different package.

Sounds like an idea?
Written on: 22.11.2011 14:57
Saturnus
Posts: 3048
Oh, and please edit you post above so you don't screw up the page, ie. remove the link in the form you have and use this instead:

http://payload.cargocollective.com/1/0/22522/263782/roskilde_poster.jpg
Written on: 22.11.2011 23:13
Hegner
Posts: 25
Det lyder som en rigtig fed ide!

Ville du så monterer subwofferne i bunden? tænkte på om man kunne monterer dem i 'kanten' også sætte en enkel 18" i bunden?

Vi ville jo gerne have solceller, er der plads nok ovenpå den satellit?

Tænkte at vi kunne bruge den øverste 'kugle' til at opbevare batterier forstærkere osv.

Tror at vi bygge den så den nærmere sig de 200 cm, så er vi sikre på at der er nok plads.
Written on: 23.11.2011 10:17
Hegner
Posts: 25
Den setup jeg selv er kommet frem til indtil videre er følgende
4 12' SP-12/200PA drevet af 2 AMP9 basic i 24 v.
og evt 1 18'SP-46/500PA drevet af 1 AMP9 basic i 24 v.

Hvor lang tid ville vi kunne spille på dem?
Written on: 23.11.2011 17:39
Saturnus
Posts: 3048
Jeg ville med sikkerhed droppe 18" bassen. Kræver alt alt alt for meget intern volumen. 4x 12" dedikerede subbasser er rigeligt. Drevet af en amp9, så kan I skifte mellem 12V og 24V som I vil. Satelitterne drives også af en amp9 (køb 3 så I har en ekstra skulle der ske noget).

Glem Monacor enhederne. Jeg har de perfekte til Jeres brug

http://www.bluearan.co.uk/index.php?id=EMIDEL12LFC&browsemode=manufacturer

Til satelliterne skal I bruge 4 af disse:

http://www.bluearan.co.uk/index.php?id=PAUE8150S&browsemode=manufacturer

og 4 af disse horn

http://www.europe-audio.com/Product.asp?Product_ID=7853

Det er præcist hvad der bruges i næste års CoffinBlaster, bare gange 2.

Hvor meget strøm det bruger? Ikke meget, ca. 3A i 24V modus ved fuld hammer. Omkring 1.5A i 12V modus, også ved fuld hammer.

Det er ikke lydsystemmet du skal bekymre dig om bruger meget når det er fornuftigt designet. Det er lyset. For jeg gætter på I skal have en masse blinkende lys og sådan noget geil. Og dét koster strøm så det batter, også selvom det er LED lys.

Hvis du er interesseret kan jeg lige lave en hurtig tegning af hvad jeg har i tankerne henover weekenden.
Written on: 23.11.2011 18:07
Hegner
Posts: 25
Jamen det ser fint ud, også prisen ser helt fin ud icon_smile.gif hvis du er frisk på udfordringen, så er der budget til at bygge det med 6-8 af de subs? og en større satellit? ikke at det er nødvendigt, men vi har jo allerede lagt en masse penge til side, og som det ser ud nu, så kommer vi kun til at bruge halvdelen på den setup du forslår?

Med hensyn til lys, så var vores plan bare at smide en LED ledning under vognen, det kan vel ikke trække det helt store?

Hvis du gider det ville det rigtig lækkert, når vi er kommet frem til det endelige design, så laver vi en tegning også for vi lavet de store 'turbog' plader hos en snedker icon_smile.gif

[This article was edited 1 times, at last 23.11.2011 at 18:10.]
Written on: 25.11.2011 12:27
Rasmus123
Posts: 108
Just made a small video showing the build of our speaker icon_wink.gif



https://www.youtube.com/watch?v=llLS_k0QwOY

[This article was edited 2 times, at last 25.11.2011 at 14:47.]
Written on: 25.11.2011 16:37
Saturnus
Posts: 3048
Hegner wrote:

Jamen det ser fint ud, også prisen ser helt fin ud icon_smile.gif hvis du er frisk på udfordringen, så er der budget til at bygge det med 6-8 af de subs? og en større satellit? ikke at det er nødvendigt, men vi har jo allerede lagt en masse penge til side, og som det ser ud nu, så kommer vi kun til at bruge halvdelen på den setup du forslår?

Med hensyn til lys, så var vores plan bare at smide en LED ledning under vognen, det kan vel ikke trække det helt store?

Hvis du gider det ville det rigtig lækkert, når vi er kommet frem til det endelige design, så laver vi en tegning også for vi lavet de store 'turbog' plader hos en snedker icon_smile.gif


Med alt det geil i skal have så skal de penge i har sparet på anlægget nok få ben at gå på. Hvis I ikke lige har en mekanikker ved hånden så skal jo købes en solid vogn i 3000-4000 kroners klassen som base som skal bygges fuldstændig om. Så skal der lys, både LED kæder, spots og strobes, solceller, forstærkere, kabler, 12V lyscomputer, hele svinet skal bygges, og males, og så lige en proffesional stripperstang som prikken over i'et.


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