API 3124VThe API 3124V is a high quality 4 channel mic preamp wih variable output and 2520 Op Amps as well as a 3: 1 Output transformer tap selection. The API 3124V is based on the legendary 3124+ and features the same RE 115 K mic input transformer as well as APIs proprietary output transformer. It provides up to 65dB of gain as well as a 20dB Pad which affects both the mic and Hi Z instrument inputs. However the 3124V now has a Variable Output Level Control