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Topic with many replies

Create your own festival stereo


Author Message
Written on: 25.05.2013 21:27
Saturnus
Posts: 3047
yup
Written on: 26.05.2013 14:04
Peter Gregersen
Posts: 9
Okay.. It might be a bit hard question to answer..

Ill try and explain more thorougly!

So we have this 2 Channel AMP from pioneeer. No subwoofer entrance. We have two satelitespeakers and a woofer. The AMP is fullrange, and my question is, if we connect the subunit and the satelitespeakers, Will the sub perform as if there was a seperate connection entrance? -

Won't the woofer play at the same frequenzy levels as the satelitespeakers if they are connect in the same entrance?

To sum up: 2 speakers and one subunit in the same entrance. Will it perform as well as if the satelites and the sub was seperately connected to their own amp? (the amp is bridgeable)

Thx icon_smile.gif

[This article was edited 1 times, at last 26.05.2013 at 14:27.]
Written on: 27.05.2013 11:44
Engelman
Posts: 28
We intend to build a small setup with two fleamarket speakers and a small amp. First i considered powering it up with 8 D-cell batteries because of ease of use (insert new ones after the old ones run out). Now i'm considering a power source that would also charge our iphones etc.

I'm thinking of getting one of these:

http://www.ebay.co.uk/itm/DC-12V-6500MA-9V-8500MA-5V-15000MA-Rechargeable-Li-ion-Battery-Pack-for-CCTV-Cam-/300812628752?pt=UK_ConsumerElectronics_Batteries_SM&hash=item4609d47310

I know the mAh values are often exaggerated in these, but would anyone still consider one of there value for the money?

hooking the 12v (8 x d-cell) battery combo to a 12v car usb charger would also do the trick i guess.

Other suggestions?

Thanks!
Written on: 27.05.2013 12:53
Saturnus
Posts: 3047
Don't think you'll be able to buy those li-ion's even if you wanted to. They changed international shipment rules at New Years. Li-ion (and especially the dangerous li-po batteries as this) are completely banned from being shipped to private persons over country borders, even within the EU.
Written on: 27.05.2013 13:07
Engelman
Posts: 28
Thanks for the info!

It came to my mind that it might be hazardous to fly with that thing... (we'll be flying to CPH from Finland)

Is there any safe alternative out there? I guess SLA's could be an option but then again the size and weight is about the same as with the D-cells, right?
Written on: 29.05.2013 17:46
Hr. Adelsten
Posts: 9
Saturnus is there any way i can contact you, because i remember from earlier in this thread that you say that it is always possible to fix a amp6, but i am lost, now i have been going through all solderings 4 times and maby they are not pretty, but there is connection.. and it did work last year!
Written on: 29.05.2013 18:38
kattskit4
Posts: 2
hello.
I'm building a small stereo. with perhaps 4x 5.25-inch speakers.
thinking of putting in a motorcycle battery (12v 12ah) to keep it small

is AMP6-BASIC overkill for such a small box?

if I buy these speakers 93dB sensitivity,
http://www.netonnet.se/art/bil-och-bat/bilstereo/hogtalare/bilhogtalare-5_25-tum/hertz-dcx1303/169236.4693/
can I bridge the 4 speakers 2 and 2?
or is it better to buy other bigger speakers?

do you think the battery will be able to play the whole festival?

[This article was edited 1 times, at last 29.05.2013 at 18:39.]
Written on: 29.05.2013 19:07
Saturnus
Posts: 3047
You can check out my Boominator MINI.

http://forum.speakerplans.com/boominator-mini-development-thread_topic74610.html

In the last few posts you can see how to adapt it to some very cheap 5.25" speakers that unlike car speakers actually sound good, and cost $3 each.

But read the whole thread!!!
Written on: 29.05.2013 19:12
kattskit4
Posts: 2
Saturnus wrote:

You can check out my Boominator MINI.

http://forum.speakerplans.com/boominator-mini-development-thread_topic74610.html

In the last few posts you can see how to adapt it to some very cheap 5.25" speakers that unlike car speakers actually sound good, and cost $3 each.

But read the whole thread!!!


thx
Written on: 29.05.2013 19:31
Hr. Adelsten
Posts: 9
Saturnus please help, im panicing!
Written on: 29.05.2013 20:53
Saturnus
Posts: 3047
Hr. Adelsten wrote:

Saturnus is there any way i can contact you, because i remember from earlier in this thread that you say that it is always possible to fix a amp6, but i am lost, now i have been going through all solderings 4 times and maby they are not pretty, but there is connection.. and it did work last year!


I'm not an expert in everything icon_biggrin.gif

Write on the Boominator's fb wall and I or someone else will probably find your problem

https://www.facebook.com/theboominator
Written on: 30.05.2013 09:00
Engelman
Posts: 28
Any Boominator Micro plans out there? icon_smile.gif

Could this be any good:

Speakers: http://www.ljudia.fi/kaiutinelementit-s82124/leveakaistaiset-c78505/visaton-fr-10-p682253/

Amp: http://www.ebay.co.uk/itm/MKll-Tripath-TA2024-fully-finished-tested-pcb-2x15watt-/261214450843?pt=UK_MusicalInstr_Access_RL&hash=item3cd198349b

Power: 8 D-cell batteries

Btw how big should the box be to get decent sound? I'd like to make something very portable
Written on: 05.06.2013 13:00
Engelman
Posts: 28
I'm sure many people here have USB outputs on their Boomboxes for charging up music players, cell phones and what not.

What is the most energy efficient way of getting 1-2A 5V usb output from 12V? If I have understood correctly, a USB car charger is not the most efficient way as most of the car usb chargers are very inefficient.

Also, it would be important that it is IPhone 4&5 compatible

Don't know if something like this could work as an easy solution?

http://tinyurl.com/k7fzktj

Thanks again!
Written on: 05.06.2013 13:14
Saturnus
Posts: 3047
Unless you're planning on constantly having things at recharge, I'm not sure it's worth the effort of getting perhaps 10-20% better efficiency compared to a standard $1 (yes, they cost down to $1 including shipping on ebay) car USB adapter. We're talking about the same amount of power that a single or two LED uses in difference.

[This article was edited 1 times, at last 05.06.2013 at 13:15.]
Written on: 05.06.2013 13:23
Engelman
Posts: 28
Saturnus wrote:

Unless you're planning on constantly having things at recharge, I'm not sure it's worth the effort of getting perhaps 10-20% better efficiency compared to a standard $1 (yes, they cost down to $1 including shipping on ebay) car USB adapter. We're talking about the same amount of power that a single or two LED uses in difference.


Thank you! You might be right. I read about the mintyboost charger kit and got carried away in terms of efficiency... http://www.ladyada.net/make/mintyboost/index.html

Still, I'm a bit tempted to order that Step down Module from ebay i linked, as it is quite minimalistic and small in size. Trying to keep everything as compact as possible.
Written on: 05.06.2013 13:42
Saturnus
Posts: 3047
It's not much smaller, if at all, than a car USB adapter fitting a cigarette lighter plug though. And that also fits tons of other things as well.

http://www.ebay.co.uk/itm/2-IN-1-IPHONE-5-CAR-CHARGER-USB-DATA-SYNC-CABLE-CHARGER-FOR-IPAD-IPOD-TOUCH-5-/321134408758?pt=UK_MobilePhones_MobilePhoneAccessories_MobilePhoneChargers&hash=item4ac51a3436

Just an example... note item location is in the UK so shipping is faster. From China, it can be a worry if things will get here in time for Roskilde actually.
Written on: 05.06.2013 14:07
Engelman
Posts: 28
Saturnus wrote:

It's not much smaller, if at all, than a car USB adapter fitting a cigarette lighter plug though. And that also fits tons of other things as well.

http://www.ebay.co.uk/itm/2-IN-1-IPHONE-5-CAR-CHARGER-USB-DATA-SYNC-CABLE-CHARGER-FOR-IPAD-IPOD-TOUCH-5-/321134408758?pt=UK_MobilePhones_MobilePhoneAccessories_MobilePhoneChargers&hash=item4ac51a3436

Just an example... note item location is in the UK so shipping is faster. From China, it can be a worry if things will get here in time for Roskilde actually.


Well that is quite small i must admit. And it also supports iPhone 5 charging...

It sais it uses 12v-24v input, but how low do you think voltage must drop for this to no longer work? I'm hope to get as much juice out of my 8 x D -cell battery pack.

[This article was edited 1 times, at last 05.06.2013 at 14:07.]
Written on: 05.06.2013 14:13
Saturnus
Posts: 3047
I can't really say for sure but typically chips for this shuts down at 9-10.5V. 8x D cells in series is about 10V under load, btw. You need 9 or 10 in series for standard 12V (10.5V to 13.5). 9 in series being the ideal choice as it prevents from burning of voltage sensitive devices attached when there's no load present.

[This article was edited 1 times, at last 05.06.2013 at 14:16.]
Written on: 05.06.2013 14:50
Engelman
Posts: 28
Saturnus wrote:

I can't really say for sure but typically chips for this shuts down at 9-10.5V. 8x D cells in series is about 10V under load, btw. You need 9 or 10 in series for standard 12V (10.5V to 13.5). 9 in series being the ideal choice as it prevents from burning of voltage sensitive devices attached when there's no load present.


Really good that you mentioned that, thank you! That in deed might be a problem as i was hoping to use a 8 D-cell battery holder. Not so sure about this after all.

Thing is, I have given up on building a festival radio from scratch, and instead play music from my Minirig (minirig.co.uk) and now i'm just figuring out what type of battery pack I should build to power the minirig and an iPhone. Sorry, i guess this is starting to get a bit out of topic...
Written on: 05.06.2013 15:06
Saturnus
Posts: 3047
Engelman wrote:

Saturnus wrote:

I can't really say for sure but typically chips for this shuts down at 9-10.5V. 8x D cells in series is about 10V under load, btw. You need 9 or 10 in series for standard 12V (10.5V to 13.5). 9 in series being the ideal choice as it prevents from burning of voltage sensitive devices attached when there's no load present.


Really good that you mentioned that, thank you! That in deed might be a problem as i was hoping to use a 8 D-cell battery holder. Not so sure about this after all.

Thing is, I have given up on building a festival radio from scratch, and instead play music from my Minirig (minirig.co.uk) and now i'm just figuring out what type of battery pack I should build to power the minirig and an iPhone. Sorry, i guess this is starting to get a bit out of topic...


Isn't minirig USB powered and theby 5V and not 12V? I'm sure I've seen battery holders for 4 batteries with USB output
Written on: 05.06.2013 15:17
Engelman
Posts: 28
Saturnus wrote:

Engelman wrote:

Saturnus wrote:

I can't really say for sure but typically chips for this shuts down at 9-10.5V. 8x D cells in series is about 10V under load, btw. You need 9 or 10 in series for standard 12V (10.5V to 13.5). 9 in series being the ideal choice as it prevents from burning of voltage sensitive devices attached when there's no load present.


Really good that you mentioned that, thank you! That in deed might be a problem as i was hoping to use a 8 D-cell battery holder. Not so sure about this after all.

Thing is, I have given up on building a festival radio from scratch, and instead play music from my Minirig (minirig.co.uk) and now i'm just figuring out what type of battery pack I should build to power the minirig and an iPhone. Sorry, i guess this is starting to get a bit out of topic...


Isn't minirig USB powered and theby 5V and not 12V? I'm sure I've seen battery holders for 4 batteries with USB output


Yep the Minirig takes anything from 2V to 9V 500mA. Charging the newer iPhones might be the tricky part. The 12v -> car USB charger would have done the trick but then there is the voltage under load problem of the D-cells.

Looking for an easy way of charging bot the iPhone and Minirig with D-cells but i'm a bit lost icon_smile.gif
Written on: 02.06.2014 19:02
Emil Holm Knuden
Posts: 1
Any experience with the use of the aa-ab009 amp. for festival sound systems? ( http://www.eio.com/p-41725-sure-electronics-aa-ab009-4-x-100watt-class-d-audio-amplifier-board-tk2050.aspx )

iam interested in advice and comments about
can i use this in a boominator design?
are there any disadvantages
Energy consumption
choice of speekers and battery
etc.
Thanks
Emil


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