SPL IRON v2 Tube Mastering Compressor (All Black)The SPL IRON Tube Mastering Compressor comes in a new revision with features improving operation and sound. This updated hardware revision can be recognized by the IRON v2 labeling on the serial number sticker. IRON v2 now has Side Chain Inserts with XLR sockets instead of Side Chain Inputs with TS sockets only. See picture below. SPL IRON combines not only the sonic virtues of legendary vintage tube compressors with the advantages of the High Dynamic