The SPL Tube Vitalizer, is a powerful valve-based harmonics processor for mixing, mastering and restoration applications. The SPL Tube Vitalizer takes SPL’s popular technology and repackages it in a sophisticated more suited to mastering applications with the different processors accessible independently. In addition to the Vitalizer section, it boasts both a solid-state and valve stage which can be selected at the push of a button. The SPL Tube Vitalizer uses Psycho acoustic theory to achieve a well-balanced tonality, depth and clarity difficult to achieve with EQ. SPL Tube Vitalizer Mastering Processor Main Features: Instrumentation amplifier, electronically balanced (differential), transformerless Nominal input level +6 dB Input impedance = 22 kOhms Output impedance < 600Ohms Max. input level +24 dBu Max. output level +22,4 dBu Minimum load ohms 600Ohms Relay Hard Bypass,Power Fail Safety Frequency response (without tubes): 10 Hz - 100 kHz (100 kHz = -3 dB) Frequency response (with tubes): 30 Hz - 100 kHz (30 kHz = -3 dB) CMRR (common mode rejection): -100 dBu at 1kHz THD & N: 0,002% at 1kHz S/N CCIR 468-3: -83 dBu S/N A-weighted: -89 dBu Power Supply: Toroidal transformer: 35 VA Fuse (primary): 500 mA (230 V/50 Hz); 1000 mA (115 V/60 Hz) Fuse (secundary): 315 mA (230 V/50 Hz); 630 mA (115 V/60 Hz) Ground-Lift switch,Voltage selector Housing: Standard EIA 19"/2U, 482 x 88 x 237mm Weight: 4,9 kg Note: 0 dBu = 0.775 V