First, I have no knowlege of any of the particulars of this amp, and am in no way associated with the designer or TTVJ. I have talked to Pete on several occasions in the past, but never regarding ANY solid state designs.
Just for grins (give or take):
Components: $50 (remember, you are buying, not getting samples - include shipping)
Case: $20 (Custom front and back panels are expensive in low volume)
PCB: $15 (again, small volume)
Board stuff/solder: $70 (this low a volume, so a manual stuff and solder - guessing two hours of assembly and test)
Misc hardware $15 (knob, screws, feet)
Assembly, test & pack $15 (1/2 hour guestimate)
Wall Wart $15
Total: $200
You cannot base a 1000 piece price for cost in small runs - and, in fact, have problems finding fab shops for small runs. And, fabricators have been known to screw up entire runs, where they may ruin all the parts in process. Just sayin. This estimate does not recognize any overhead, like legal work (product liability), or patent protection, or even design software and prototyping expense.
It all adds up, even if you get it all right, and with no scrap or complications. As you see, there is $100 in labor, no matter what all else, and that estimate may be low.
Edited by pabbi1 - 8/21/11 at 7:06pm