Wattage Rating Of Pots Used In Volume Control

I want to build I volume control for a battery powered amplifier I use
for my iPod, but I'm not sure what wattage value the pots have to be.
The amplifier outputs around 1 watt per channel.

The volume circuit I found was in a post on this newsgroup from 2001
by Beau Schwabe:

o------------->Right(+)
|
| o----o
+ | | |
Right(+)>----||----o----\/\/--o
100uF 1K Pot |
o-->GND
100uF 1K Pot |
Left(+)>----||----o----/\/\--o
+ | | |
| o----o
|
o------------->Left(+)

I plan on using two separate 1K pots, allowing me two adlust the left/
right channels separately, and the fact I can't get a dual pot of the
right value at *** Smith.
.

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