Altec 1561A Preamplifier package.
Six Altec Tube 1561 Tube preamplifiers mounted on a 3 RU panel. Original Vintage Altec Green.
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This is a small tube mixer constructed of 6 Altec Lansing Tube Mic preamplifiers, with 5 Mic inputs and one Preamplifier wired as a summing amplifier. The modules use 12AX7/7025 tubes, and have sockets for Altec/Peerless 4722 input transformers. This piece is unrestored, in original condition, less plug-in transformers and power supply.
All of the hardware, connectors, wiring and components are original, and it's likely the tubes are as well.