WPA 4400 is a complete headphone amplifier which enables to connect 4 headphone stereo channels to the same audio source.
Each independent channel has a balanced aux input, a general and local control, mono / stereo switch, and a signal level indicator. Each channel has 3 headphone outputs (1 on frontal panel and 2 on rear panel).
WPA 4400 has a direct general input L & R with gain control and balance. So many configuration options make from WPA 4400 something more than a common headphone amplifier, making it the ideal product for conference rooms, press conferences, radio stations, etc.