ART TPS II Tube Preamplifier System Variable Input ImpedanceNewly enhanced V3 Variable Valve VoicingLED input meterAnalog output meterEnhanced ART Tube TechnologyAutomatically switches between instrument and mic preampWide frequency response (5hz-50kHz)Enhanced OPL Output Protection LimiterToroidal transformer It features variable input impedance which allows users to dial in and match any microphone type from large condensers to ribbon mics Like its predecessor, the DPS, the newly improved V3 feature provides optimized reference points to begin the recording process for guitars, bass guitars, synths, acoustic instruments, percussion, vocals, and more Unique to its class, the TPS II provides level monitoring with 2 analog meters as well as 2 newly added input monitoring LED meters High-Z instruments or balanced microphone signals are input through front and rear panel jacks