The MA501t from Soundtube is a low-voltage mono power
amplifier typical for use in distributed sound applications
and use front panel for recessed gain control. The control
prevents unauthorized tampering with levels or other
settings. Compatible for use with SoundTube as well as other
high-fidelity speakers, the MA501t offers 50W of output power
at 100V, 70V, or 25V. It provides a 12V trigger for auto-on/
off functions. Approved by UL 60065 Listed; CCC, CE, RoHS.