You could also try WiFi Speaker:
https://play.google.com/store/apps/details?id=pixelface.android.audio
Here's the main site:
http://pixelatedmind.com/wifispeakers/
It has all the same features as SoundWire plus an audio equalizer. Overall it just feels like a more professional, finished product.
Also the server is just beautiful. I love it. I use it to watch TV at night when everyone is sleeping.