Adastra Add-On 100v Washroom / Corridor Ceiling Speaker Bundle

The Adastra US60 100V slave amplifier is built into a half width 1U housing. 1x Adastra US60 Compact 100v Slave Amplifier 60w. 100V input for connection in parallel with existing 100V speakers. Can expand an existing 100V speaker system directly from the speaker cable.

eBay