Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




6201 posts

Uber Geek
+1 received by user: 2906

Subscriber

Topic # 84068 24-May-2011 17:01
Send private message

This is not a home theatre question but it is an audio one and I'm not sure where else to post it. Apologies if this is the wrong place.

I need to contrive an inexpensive high volume 12-volt PA system for a friend to use in a parade. It has to be mounted on and powered by a quad bike. There are a few commercial options that would do the trick, but they are much too expensive. My thought is to pick up a 100+ watt car stereo amp on Trade Me, bridge it to drive a single speaker, disable any low pass sub-woofer filter, and plug my friend's MP3 player into the line input as an audio source. Can anyone tell me any reason why this might not work, or anything I should watch out for?

 

 




I reject your reality and substitute my own. - Adam Savage
 


Create new topic
1835 posts

Uber Geek
+1 received by user: 243

Trusted

  Reply # 473544 24-May-2011 17:27
Send private message

Are you going to power it off the quad's battery?

Rather than an amp, you could buy a cheap headunit and drive up to four speakers directly off it, I think four speakers faced out around 360 degrees would project the sound better than one big one.

For the speaker(s) i would be considering a horn speaker (~$30 from jaycar, etc) which projects higher frequencies much better, although is quite directional so you would need more than one.

For Undie 500 a couple years back we used a horn speaker from a car alarm, hooked it up to a cheap 40W audio amp module and played the dukes of hazard horn sound from my ipod. Our theme was 'pukes of hazard' so it worked a treat, turned a lot of heads!

I cant think of any reason why your idea wouldnt work.

20580 posts

Uber Geek
+1 received by user: 3964

Trusted
Subscriber

  Reply # 473548 24-May-2011 17:33
Send private message

Should be fine. Look for a class D one if you are running off the battery and want a longer runtime before the battery dies.




Richard rich.ms

 
 
 
 




6201 posts

Uber Geek
+1 received by user: 2906

Subscriber

  Reply # 474254 26-May-2011 08:54
Send private message

Thanks for the replies. I appreciate the suggestions, especially about the horn speakers. I see the Jaycar ones say they can handle 400 watts rms at 8 ohms. I'm also following an amp on Trade Me that warns it needs to be connected to at least a 600 watt speaker to avoid melt-down. I assume I can just parallel wire two horns to get the right impedance and power though I'm not so sure if the quad bike can keep up with the battery drain. My real question though is if this is even legal? I don't want to blow any kiddie eardrums.




I reject your reality and substitute my own. - Adam Savage
 


Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

New Zealand hits peak broadband data
Posted 18-Jan-2018 12:21


Amazon Echo devices coming to New Zealand early February 2018
Posted 18-Jan-2018 10:53


$3.74 million for new electric vehicles in New Zealand
Posted 17-Jan-2018 11:27


Nova 2i: Value, not excitement from Huawei
Posted 17-Jan-2018 09:02


Less news in Facebook News Feed revamp
Posted 15-Jan-2018 13:15


Australian Government contract awarded to Datacom Connect
Posted 11-Jan-2018 08:37


Why New Zealand needs a chief technology officer
Posted 6-Jan-2018 13:59


Amazon release Silk Browser and Firefox for Fire TV
Posted 21-Dec-2017 13:42


New Chief Technology Officer role created
Posted 19-Dec-2017 22:18


All I want for Christmas is a new EV
Posted 19-Dec-2017 19:54


How clever is this: AI will create 2.3 million jobs by 2020
Posted 19-Dec-2017 19:52


NOW to deploy SD-WAN to regional councils
Posted 19-Dec-2017 19:46


Mobile market competition issues ComCom should watch
Posted 18-Dec-2017 10:52


New Zealand government to create digital advisory group
Posted 16-Dec-2017 08:47


Australia datum changes means whole country moving 1.8 metres north-east
Posted 16-Dec-2017 08:39



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.