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Class D Switching Power Amplifiers and Power D/A conversion

Tube system for bike
Tube system for bike
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Old 16th February 2018, 09:24 PM   #1
iowatheoutdoorsman is offline iowatheoutdoorsman  United States
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Default Tube system for bike

Hey guys, this is my first post. I want to build a amp speaker system that I would strap to my bike and be portable. I am thinking of using 6" PVC pipe with 6.5" marine speaker at each end. The amp and battery would go in the middle. I would like a bluetooth amp so I can play music from my phone with no wires. I am looking for decent sound and can be turned up if I have it outside working in the yard or garage. Trying to keep the price down. That is a lot to ask for, but does anyone have some suggestions on where to start.
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Old 17th February 2018, 12:08 AM   #2
ICG is offline ICG  Germany
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Unless you're mounting the pipe more or less parallel to the handlebar, you won't get much out of stereo. With the speakers pointing in the exact opposite direction you won't get enjoyable stero sound then either.
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Old 17th February 2018, 01:45 AM   #3
Pano is offline Pano  United States
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Tube system for bike
Years ago there were some systems here that were bike based, and some back-pack based for roller-skates. Not sure how you'd find the threads.
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Old 17th February 2018, 02:03 PM   #4
iowatheoutdoorsman is offline iowatheoutdoorsman  United States
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Quote:
Originally Posted by ICG View Post
Unless you're mounting the pipe more or less parallel to the handlebar, you won't get much out of stereo. With the speakers pointing in the exact opposite direction you won't get enjoyable stero sound then either.
I am going to mount it on a rack over the back wheel. I ride with a big group so there would be people in front and behind me.
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Old 17th February 2018, 02:05 PM   #5
iowatheoutdoorsman is offline iowatheoutdoorsman  United States
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Quote:
Originally Posted by Pano View Post
Years ago there were some systems here that were bike based, and some back-pack based for roller-skates. Not sure how you'd find the threads.
I have tried to find some threads on here but nothing like what I want to do.
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Old 17th February 2018, 03:40 PM   #6
ICG is offline ICG  Germany
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I am going to mount it on a rack over the back wheel. I ride with a big group so there would be people in front and behind me.
That's the prime example use where mono is better than stereo. The Tube as a housing for the amp might be tempting but you have to build a separate enclosure because the amp creates heat which can only be dissipated by air. Which in turn means you need venting slots.
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Old 17th February 2018, 04:34 PM   #7
tomchr is offline tomchr  Canada
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Unless you're going with tubes for the coolness factor - in which case they will have to be exposed, of course - seriously consider a Class D amp and a tube emulation circuit. You'd get far better efficiency (battery life) that way.

Tom
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Old 17th February 2018, 06:05 PM   #8
mkane77g is offline mkane77g  United States
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Tube system for bike
Bike based audio not the best idea in the world IMO.
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Old 17th February 2018, 08:11 PM   #9
voltwide is offline voltwide  Ireland
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I understand an amp inside a tube is NOT a tube amp per se. Your best bet will be a cheap BT-class-d-amp-modul based on TPA3116 or TPA3118. Use a 12V/1.5Ah SLA and enjoy.
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Old 17th February 2018, 08:59 PM   #10
adason is offline adason  United States
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I think he should use real tube amplifier, not cheap class d stuff. Like in good old times when car stereos were all tube...that would be cool!
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