Both channels are totally independent and have identical features. These include attenuator switches that pad the inputs by -20 or -40 dB, and ground-lift switches that fully isolate each input from the chassis and the output to help eliminate hum and ground-loop noise.

You also get phase invert switches, 1/4" pass-through jacks, and switchable low-pass filters. The latter attenuate -3 dB at 30 kHz, and are designed to reduce radio-frequency interference (RFI) and digital computer noise. Combine all that functionality with a solid, black-anodized aluminum case, and you've got a handy and road-worthy direct box.

Fully passive, high-performance transformer design; no battery required
Converts 50kΩ inputs into 600Ω balanced outputs
Switchable input attenuation (0, -20, -40 dB) helps you keep from overloading the inputs
Switchable low-pass filters (-3 dB @ 30 kHz) reduce RF interference and computer noise
Phase invert switches let you switch signal polarity at the source
Ground-lift switches help eliminate hum, and fully isolate the inputs from the chassis and outputs
Balanced XLR outputs for connection to mixers, audio interfaces, and other low-impedance devices
Low-pass filters help eliminate RF interference and digital computer noise
Rugged and compact extruded-aluminum case

ART DUALZDirect Specs
Type Passive, Dual
Input Connections 2 x 1/4" TRS phone (unbalanced); 50kΩ
Output Connectors 2 x XLR male; 600Ω
2 x 1/4" TRS phone (pass through)
Frequency Response 10 Hz - 50 kHz, ± 0.5 dB @ +4 dBu
THD 0.01% typical @ 1 kHz, +18 dBu / <.05% @ 100 Hz, +18 dBu
Channel Separation > 80 dB (typical)
Controls 2 x Low-Pass Filter (switchable); -3 dB @ 30 kHz
2 x Input Attenuation (switchable); (0, -20, -40 dB)
2 x Phase Invert (switchable)
2 x Ground Lift (switchable)
Dimensions 4.6 x 3.9 x 1.85" (117 x 99 x 47 mm)
Weight 0.88 lbs (0.40 kg)
Packaging Info
Package Weight 1.15 lb
Box Dimensions (LxWxH) 13.1 x 6.5 x 2.2"