This corner stone of the IP audio suite is a go to for distributed audio application supporting 4 zones of 50W/ch 1 zone of RCA stereo out for connection to a higher powered amp and 1 optical out for use in zones with an AVR.  This all-in-one package features built-in amplification, distribution, control, and a music server containing a single stream of Savant Music 2.0.  
 
Key Features 
– Enables 6 zones of audio switching: 4 zones of amplification at 50 watts per channel and 2 zones of pre-amp output (1 RCA and 1 Digital TosLink).
– 4 Audio inputs (2 analog, 2 digital)
– 4 IR ports
– 2 RS-232 ports
– Combine units with AVB switches for expansion to meet any job
   – 4 units with a Smart Host provides 18 total zones (16 amplified, 8 pre-amp) and 4 built in streams of Savant Music
   – 16 units with a Pro Host provides 96 total zones (64 amplified, 32 pre amp) and 16 built in streams of Savant Music
– Flexible installation with options for rack, structured media, and credenza mounting