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Old 30th June 2014, 12:29 PM   #1
adri123 is offline adri123  United Kingdom
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Default DIY Carnival Sound System ?

Two threads have been merged.

Hi.

We did our local carnival at the weekend and our system was drowned out by others.

Can anyone recommend an amp module and speaker that I could build into a home made cabinet that would produce a good loud volume. Ideally working off 12volts so we could power it using a car battery.

Something like a more powerful version of this?

MKll Tripath TA2024 fully finished&tested pcb 2x15watt | eBay
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Old 30th June 2014, 12:31 PM   #2
adri123 is offline adri123  United Kingdom
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Default Speaker for Carnival Sound System?

Hi,

I've just posted in the PA section of the forum so please excuse posting here too.

I'm looking for a full range speaker to fit into a DIY cabinet to use on a carnival float.

Any recommendations would be gratefully received.

Adri
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Old 30th June 2014, 01:30 PM   #3
GM is offline GM  United States
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Greets!

Unless someone here just happens to know the audio performance requirements for a carnival float in general and yours in particular, you're going to have to elaborate since my first thought is that a 'full-range' driver isn't going to be anywhere near loud nor focused enough without a large horn. Then there's the water/moisture proofing required.............

GM
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Old 30th June 2014, 02:23 PM   #4
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We use two 1kW power amps feeding four 15" and four 12"drivers built into four cabinets. One on each corner. And four Tannoy 50W PA Horns that are fed from a 200W power amp. A small mixing desk for music and microphones.
When flat out, we can be heard with any sort of quality in open air only 200yds. We used a Nexo 9kW system with subs last year and blew everyone else away. Got told off for that!
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Old 30th June 2014, 03:20 PM   #5
adri123 is offline adri123  United Kingdom
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Wow!!! There's no way we can justify spending on that kind of gear. I want to get what I can for 100.00 or thereabouts. I've seen a 2x50w tripath module on ebay for 22.95. If we went for that what full range speakers would match the module?

Thanks for the help!!!!
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Old 30th June 2014, 03:33 PM   #6
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What was everyone else running?, mains or battery, and what kinds of speakers?.

Essentially off a 12V battery you can get 4W RMS to 4 ohms (single ended), or 16W RMS with a bridged amp - anything else is imaginary power.

To get more power you need to increase the voltage, and higher power amps use a DC to DC converter to give higher power rails - but obviously take MUCH more current from the battery.

Here's an example of a suitable power supply, and a good site generally:

Switchmode Power Supply For Car Audio

You need to be aware that if you use a car amp they almost always totally exaggerate their power massively - with a 50W amp often called 1000W
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Old 30th June 2014, 03:39 PM   #7
adri123 is offline adri123  United Kingdom
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Hi Nigel. It was Tideswell Carnival. You may have been there as I see you're in North Derbyshire.

Currently looking at generators on ebay and they're quite cheap for a 0.75 Kw genny so perhaps 240v is possible.
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Old 30th June 2014, 04:00 PM   #8
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Quote:
Originally Posted by adri123 View Post
Hi Nigel. It was Tideswell Carnival. You may have been there as I see you're in North Derbyshire.
No, I wasn't there, but I know Andrew Burns well, as he fits satellite dishes for us - I presume you know Andrew, as it's not a big place

Quote:

Currently looking at generators on ebay and they're quite cheap for a 0.75 Kw genny so perhaps 240v is possible.
A better solution - just remember to take extra petrol for it!
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Old 30th June 2014, 05:49 PM   #9
Greg B is offline Greg B  United States
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As has been pointed out, it's not really possible to give you great advice without knowing more specifics about the requirements. Are these going to play music? or are they only for announcements?

It's unlikely 50w amps will be nearly enough. 1kW is more like it.

If the former, I'd recommend a couple K15 Karlsons. Forget full range drivers. Load them with the best used 15" pro drivers you can swindle, and a couple cheap piezo horns for the highs. Check out this old thread: A Speaker that Kicks Butt in Large Spaces

For the latter, just find yourself a used PA announcement horn.
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Old 30th June 2014, 05:57 PM   #10
freddi is offline freddi  United States
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the original Karlson cabinet + a decent 15" woofer - Piezo without any transformer will be loud enough to work. K15 has low cone excursion and an adept upper bass - much better than most "fullrange" setups and many horn.
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