Hi all,
Im keen to build a sound system which i can transport with my Cargo Bike. The combined system dimensions should be no greater than 40cm wide x 70cm deep x 100cm tall. It will need to be powered by batteries.
It will be used to play music at rallies and for small outdoor dance parties. I have looked at things like the boominator and halfinator but wondering if there is something that might be more appropriate for my appplication.
Music will be electronica with little in the way of vocals.
Im also in Australia so somehwat limited around access to cheap drivers 🙂
Appreciate any advice 🙂
Im keen to build a sound system which i can transport with my Cargo Bike. The combined system dimensions should be no greater than 40cm wide x 70cm deep x 100cm tall. It will need to be powered by batteries.
It will be used to play music at rallies and for small outdoor dance parties. I have looked at things like the boominator and halfinator but wondering if there is something that might be more appropriate for my appplication.
Music will be electronica with little in the way of vocals.
Im also in Australia so somehwat limited around access to cheap drivers 🙂
Appreciate any advice 🙂
See party speakers...they might work.
Or use car speakers and car radio, from new or scrap.
You can use 12V batteries as well, depending on your load, use the right battery.
And do post a photo of your cargo bike, for those of us who are not familiar with them.
Or use car speakers and car radio, from new or scrap.
You can use 12V batteries as well, depending on your load, use the right battery.
And do post a photo of your cargo bike, for those of us who are not familiar with them.
Disk brakes!
How much do the bikes cost?
Here 10 speed were about US$ 200...now I don't keep track.
Regular ordinary single speed about US$100, for the most expensive one.
How much do the bikes cost?
Here 10 speed were about US$ 200...now I don't keep track.
Regular ordinary single speed about US$100, for the most expensive one.
That is a $9300 bike. That bike has bosch mid-drive, and the chain drive steering adds about $2000 to the price. R&M is high quality and you pay for it.
I ride a $2800 stretch frame yuba cargo bike with two 26" wheels, and the steering in the front.
See this thread: https://www.diyaudio.com/community/threads/backpack-challenge.366187/
You can allow a little more volume than the backpack for lower bass f3, and more battery. Say about 54 hz. I'd say dual 48 v 10 AH or bigger LiIon batteries are the modern solution for class AB amp. Avoids energy losses in an inverter. If class D, they seem to like a 19 to 24 v power supply better. Personally I'd buy a M-2600 and ditch the transformer, just run the PS rails direct off 2 batteries. Or for monaural, a M-3000 which is even cheaper on ebay. For built in speaker protection a $75 MMA-8150t has 150 w , +- 42 rails, and a transformer to protect the 8 ohm speaker.
I ride a $2800 stretch frame yuba cargo bike with two 26" wheels, and the steering in the front.
See this thread: https://www.diyaudio.com/community/threads/backpack-challenge.366187/
You can allow a little more volume than the backpack for lower bass f3, and more battery. Say about 54 hz. I'd say dual 48 v 10 AH or bigger LiIon batteries are the modern solution for class AB amp. Avoids energy losses in an inverter. If class D, they seem to like a 19 to 24 v power supply better. Personally I'd buy a M-2600 and ditch the transformer, just run the PS rails direct off 2 batteries. Or for monaural, a M-3000 which is even cheaper on ebay. For built in speaker protection a $75 MMA-8150t has 150 w , +- 42 rails, and a transformer to protect the 8 ohm speaker.
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That kind of money will buy a decent compact car here, that is a lot of money for a bike.
Enfield 350 cc are in 3000 USD range...
That apart, a decent system can be built from car audio parts.
Is intended for occasional use, or will be built in?
The Bosch drive batteries may be tapped as supply?
Enfield 350 cc are in 3000 USD range...
That apart, a decent system can be built from car audio parts.
Is intended for occasional use, or will be built in?
The Bosch drive batteries may be tapped as supply?
The wire harness on the R&M bike is well hidden. Not accessible to be tapped. Besides, Bosch patented batteries cost 3 to 5 times per watthour what generic lithium ion batteries cost. There is the additional risk of partying too hard and not being able to motor home.
Not the cheapest LiIon batteries are reliable. There are 3 vendors or so in the US to be trusted, and amazon & ebay are not them. As all LiIon batteries are made in ***** except for cars, I would recommend any builder read electric bike forums in their country to find the reliable battery suppliers in their country. 36 v batteries are useable 42 v to 30.6 v. 48 v batteries are useable 54.6 to 39.8 v . There are some 39 v batteries available in LiFePo4 formula.
I'd avoid conventional amplifiers in this particular case, seems like class D is the winner. And up to 60 V single supply.
About the acoustical side...I'd like to know how the bike is positioned in relation to the audience. Subwoofer in the big cargo space plus two satellites, to be positioned at ear height. The sub can be open back, for commodity and to allow to position the satellites inside. Those can be a 10",+1" CD+horn, also open back box so the tweeter can be extracted from inside and then positioned outside. YES, it's a matrioska!
The selection of drivers should be between pro-drivers (B&c and 18sounds have some projects on their sites) as they sound louder!
For subwoofer, probably a car audio should make it... I don't know... A 15" or two 12"s....make all the calculations for power output, depending on the amplifier and the load, then the power supply and Ah factor