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DIY Small/Powerful/Responsive Battery Powered Portable Setup

2K views 4 replies 5 participants last post by  Lumen 
#1 ·
Issue here is not quality but quantity, the reduction of it. We're mobile a lot (camping, rugby tours etc) so over the years, as technology develops, my mobile home theater setup has evolved. Currently (Photo Attached):
  • Touchjet Pond (think Android tablet but with led projection instead of screen + hdmi in option)
  • Adafruit MAX9744 20W Stereo Amp Module
  • 2xBoss Cubes (off an inherited Accoustimass 3)
Power
  • Touchjet has own internal battery
  • Amp module runs off 2x18650's
  • Also carry a 6x18650 dual output (5v2A,3.5-24v3A variable) battery pack
The AV output of the setup (lumens/dB's) is surprisingly more than adequate for a room/coach/tent full of kids BUT obviously the Boss cubes suffer greatly from the absence of their sub.
SO, onto the question - opinions on what to supplement/replace with?
I'm a DIY'er so don't mind driver based options (inc. mounting drivers within drivers), not stuck on Boss (good power to size ratio, didn't cost me anything)
Goals:
  • Adequate frequency response (think hotel kiddie movies/discos)
  • Maximum Power from Minimum Displacement (Boss'like power:size ratio)
  • Battery Powered Amp (if anyone knows of any that exceed the MAX9744 specs in similar form factor)
  • Stereo unbalanced input, 2.1 output (MAX9744 amps are cheap enough/slim enough to dedicate one to sub if needed, passive or active crossovers (miniDSP?))
  • Bonus Points: Flexibility - options to run without the sub (2.0), superlight single speaker (1.0), 'audience' mono 2.1
ie. where's the balance of smallest/loudest/responsive/flexible battery based component system?
 

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#3 ·
Hi Steve
Cool setup. I just read through your post and thought of these products. The first link is a mini amp. It seems to be a more powerful option (4x100w) with a similar power supply (approx. 12v). I don't have personal experience with that product. The next link is a pair of bookshelf speakers. They might be a little big (standing 12" tall) for your limited space, but they are a phenomenal deal. I read many reviews on them, including a review in audiophile magazine. I finally bought a pair, partly to satisfy my curiosity. The speakers are actually decent, but at that price, I can't think of a better deal. Hope this helps.
Good luck, peace
Jeremy

http://www.parts-express.com/sure-e...udio-amplifier-board-sta508-(tk2050)--320-335
http://www.parts-express.com/dayton-audio-b652-6-1-2-2-way-bookshelf-speaker-pair--300-652
 
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