Originally posted by: rleemhui
You obviously didn't read hard enough. Neither of those are the ZS. The ZS is about $90. The answer to your question is one is OEM and one is not
Originally posted by: The J
The regular Audigy 2 has 6.1 channel support. The Audigy 2 ZS series has 7.1 support and is able to decode Dolby Digital EX and DTS-ES signals (I don't know if the A2 can or not).