The Radial ProAV2 is a passive direct box specifically developed with the audio-video integrator in mind. It has full two-channel stereo functionality.

To eliminate the need for various adaptor, a "Swiss Army" array of connections are provided, including 1/4" for instruments, RCA and 1/8" connectors for consumer electronics and computers, and a +4dB XLR input for professional systems. Front panel connectors can also be used as thru-puts to allow multiple patch points.

Custom wound transformers are employed, which are able to withstand exceptionally hot levels while maintaining linearity from 20Hz to 18.5kHz. The resulting smooth Bessel curve is warm and natural, making the ProAV2 Passive DI box particularly adept at handling digital sources that can sound harsh. Transformer isolation adds the benefit of eliminating ground loops that cause audio hum and buzz and video hum bars or snow.

Features

• Great-sounding, flexible passive DI
• High performance custom-wound transformer
• Pro "Swiss Army knife" direct box for multi-media
• Easy to use passive ultra-quiet design
• Eliminates ground loops causing hum and buzz
• Handle huge transients without distortion
• Completely passive, no power needed
• XLR, 1/4", RCA and 3.5mm inputs
• Built-in stereo to mono merge function
• -15dB PAD for wide range of input levels
• Converts hi-Z consumer to low-Z mic-level
• Connect a stereo source to a mono channel
• Unbalanced audio from CDs, laptops, VCRs
• Ultra-tough 14 gauge steel enclosure
• Audio circuit type : Passive, transformer based             Passive, transformer based
• Number of channels : Single channel (mono) Dual channel (stereo)
• Frequency response : 20Hz ~ 18.5KHz (± 0.2dB)         20Hz ~ 18.5KHz (± 0.2dB) 
• Dynamic range : 128dB      128dB
• Maximum input : +18dB @ 20Hz      +18dB @ 20Hz
• Total harmonic distortion : 0.01% from 20Hz~20kHz @-10dB    0.01% from 20Hz~20kHz @-10dB
• Phase deviation : 1° @ 100Hz; 8° @ 20Hz     1° @ 100Hz; 8° @ 20Hz
• CMR ratio : 100dB @ 60Hz               n/a
• Input impedance : 140k Ohms, unbalanced   140k Ohms, unbalanced
• Output impedance : 150 Ohms, balanced       150 Ohms, balanced                          
• Transformer : Eclipse ET-DB2, 12:1 ratio        Eclipse ET-DB2, 12:1 ratio
• Shield : Faraday, MuMETAL® can   Faraday, MuMETAL® can
• Input pad : -15dB                 -15dB 
• Merge : Sums left & right to mono    n/a
• 180° polarity reverse : Inverts absolute phase               Inverts absolute phase
• Ground lift : Disconnects pin-1 at XLR output                 Disconnects pin-1 at XLR output
• XLR configuration : AES standard (pin-2 hot)                 AES standard (pin-2 hot)
• Connectors : 1/4", RCA,  3.5mm, in & thru, XLR-F in, XLR-M out              1/4", RCA,  3.5mm, in & thru, XLR-M out       
• Construction : 14 gauge steel chassis & shell 14 gauge steel chassis & sshell
• Finish : Durable powder coat