TEC TC-905 5-Way Speaker Distribution Controller with Volume Control

TEC TC-905 Commercial 5-Pair Speaker Distribution Center Selector Switch

5-way stereo distribution amplifier with gain adjust (AV Communications AD-500)

Mini PH05 5-Way Distribution Headphone Amplifier Amp Separate control for Band

TEC TC-616 6-Way Stereo Speaker / Amplifier Comparator

Rolls RA170 70 Watt 70V Distribution Amplifier 1U Rack Mount TESTED Working A++

TEC TC-616 6-Way Stereo Speaker / Amplifier Comparator

TEC TC-616 6-Way Stereo Speaker / Amplifier Comparator NIB