[James Romeyn]

This http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-380&FTR=300-380&CFID=23690538&CFTOKEN=93194244 amp's 2 channels can be employed, but if money can be saved 1 ch will work just as well.  One input minimum; power is the only necessary control; speaker output can be hard wired.  AC/DC operation (included above) is highly desirable though optional. 

$15-ish is the approximate maximum for large lots to beat my bulk price for above.  Links are appreciated.

   

[mgalusha]

MCM has several single channel, really low cost amps. 12W for $12.99 each, cheaper in quantity.

http://www.mcmelectronics.com/product/KEMO-ELECTRONIC-M032-/28-6402

18W for $17.99 http://www.mcmelectronics.com/product/KEMO-ELECTRONIC-M033-/28-6403

Dunno if those will work but the price is right.

Another, this one has a volume pot http://www.mcmelectronics.com/product/MCM-CUSTOM-AUDIO-50-4605-/50-4605

[James Romeyn]

Mike
I very much apologize for not specifying the amp must be self contained ready for end user, with AC operation including attached cord or AC/DC with batteries intact.

Thanks very much for your time and effort.

I'll confidentially PM you my cost for the PE amp, which looks more like the winner considering your referrals above, which seem to all need a PS unless I'm wrong (again).

     

[mgalusha]

No worries James, it wasn't much effort. The new MCM catalog came the day before, so I knew they existed.

Mike