6 TASCAM US-2x2/US-4x4Cleaning the unitTo clean the unit, wipe it gently with a soft dry cloth.Do not wipe with chemical cleaning cloths, benzene,thinner, alcohol or other chemical agents. Doing socould damage the surface or cause discoloration.User registrationCustomers in the USA, please visit the TASCAMwebsite (http://tascam.com/) to register as a useronline.Names and functions of partsFront panelUS-4x4 front panel US-2x2 front panelw7 8 9 0 q1 2 3 4 5 671 2 3 4 5 68 0 q w1 SIG indicatorsThe SIG indicators light green when signals (ofat least −32 dBFS) are input through the IN1/IN2jacks (and US-4x4 IN3/IN4 jacks).2 PEAK indicatorsThe PEAK indicators light red when signals thatare about to distort (−1 dBFS or higher) are inputthrough the IN1/IN2 jacks (and US-4x4 IN3/IN4jacks).3 GAIN knobsUse to adjust the input levels of the IN1/IN2 jacks(and US-4x4 IN3/IN4 jacks).4 USB indicatorThis lights when the USB connection is working.5 LINE OUT knobUse to adjust the output level of the LINE OUTjacks.6 PHONES knobUse the PHONES knob to adjust the headphoneoutput level.CAUTIONBefore connecting headphones, minimize thevolume with the PHONES knob. Failure to do somight cause sudden loud noises, which couldharm your hearing or result in other trouble.7 Phantom power switch/indicatorUse this switch to provide +48V phantom powerto the IN1/IN2 jacks (and US-4x4 IN3/IN4 jacks).The indicator lights when the phantom powerswitch is set to +48V.8 IN1/IN2 (BALANCED/UNBALANCED) jacksThese input jacks are XLR/TRS combo jacks onthe US-2x2 and separate XLR and standard TRSjacks on the US-4x4.Use the MIC/LINE INST switches on the frontof the unit to enable balanced line (MIC/LINE)input or unbalanced (INST) input for the XLR/TRScombo jacks and standard TRS jacks.9 IN3/IN4 (BALANCED) jacksThese XLR analog mic input and standard linelevel TRS jacks are balanced input jacks.CAUTIONOn the US-4x4, the IN1–IN4 (8, 9) inputs eachhave two jacks (XLR and TRS). Do not inputsignals through both jacks of the same input atthe same time. If signals are input through bothat the same time, neither signal will be receivedproperly.0 MIC/LINE INST switchesSet according to the IN1/IN2 jack input sources.Set to MIC/LINE when connecting electronicinstruments, audio devices, mics and similarequipment. Set to INST when connecting anelectric guitar, electric bass or other equipmentwith high output impedance.