The Chandler LTD-2 compressor/limiter is based on the Neve 2254 compressor which is the class A predecessor to the Neve 2264 and 33609. The single-channel Chandler LTD2 uses the same audio circuit with a modified set of controls (i.e. attack times not found on the original and additional [faster] release times).
A PSU-1 power supply is required; it will power 2 Chandler LTD-2 compressors.