Audio Systems: Audio Equipement, multi track recorders, multitrack recorder

Question
QUESTION: I am doing an installation piece in which multiple sound tracks will be played on
different speakers/headphones (one track on one speaker, another track on a
different speaker). What equipment do I need to get/Is there a way to
accomplish this with one central device?

ANSWER: It is difficult to answer this because I don't know how many tracks you are intending to use.  As the number of tracks increase the cost of the equiment will also increase.  Please note that headphones only have 2 possible speakers (L/R).  Please explain further and I'll try to provide more details.
Dan

---------- FOLLOW-UP ----------

QUESTION: I have about ten different tracks and ten different speaker/headphone sources
needed... one track for every speaker

Answer
Tascam has a multitrack recorder that will give you separate inputs and outputs (8 I think).  You will need 4 amps and 8 speakers.  It is not possible to use headphones unless you plug them into each amp or use the headphone jack on the Tascam and select one track at a time.
Hop onto the Tascam website for details on the equipment available.  It will be listed under multi-track recorders.
Dan