The AC adapter with my computer speakers is broken/dead and I want to
replace it with a new one. The specifications on the dead adapter are
as follows.

INPUT: 120VAC 60Hz
OUTPUT : 13VAC 800mA

If I have to replace it with a new one what are my options. Should I
look for exactly the same specifications or something other will also
work? Do I have to replace it with an AC to AC adapter or can I replace
it with a DC adapter? If I can use a AC to DC adapter what
specifications should I remember.

thankyou very much in advance.

Naveen