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For Sale: O2 (Objective2) trans-portable

post #1 of 4
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This Classified is Closed

For Sale:
O2 (Objective2) trans-portable

Will Ship To: Anywhere

Selling a DIY O2 amp.


I built this amp a while ago. Never put batteries in it, but all test points checked out as per designer's instructions. Put in a different case than spec'd as I wanted it a little bigger for better layout. All parts ordered from designer's BOM. Only changes are ...


  • Added optional RCA inputs (still has 1/8 mini jack)
  • 1/4" TRS jack
  • Toggle power switch
  • Mounted LED, output jack, volume, and power switch off of board to seperate from inputs and power jack. I.E. amp has fr. and back as opposed to everything on one panel.
  • All signal wires 24ga teflon coated copper (CAT6 wire, my favorite).


This amp has worked flawlessly from day 1. Just never use it.


Case measures 4.5" x 4" x 1.5" and comes with the designer's optimum power supply.


Buyer pays for shipping. Can put in medium flat rate USPS box to U.S. addresses for $11.15, or smaller box for 1st class mail or carrier of buyers choice. Will have to get shipping quote. PayPal ok and I will cover fees. Prefer to sell to US or Canada only. Will consider Int'l if buyer has positive feedback on HeadFi.

post #2 of 4

if one were to put rechargeable batteries in this could they be charged via simply plugging the unit in or would they require there own charging system? excuse me if that's a naive question. And how long is the approximate battery life?

post #3 of 4
Thread Starter 

Sale Pending....

post #4 of 4
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