User Guide ProAV2 - Radial Engineering
Contents
1. AC Mains The right channel LIFT feature can be used on devices that plug into AC mains power to reduce hum and buzz caused by ground loops The dashed line shows the ground loop formed between the AC mains and the signal cable ground GROUND To make grounding as flexible as possible the ProAV2 features a GROUND switch and all connectors are isolated from the chassis to help eliminate noise caused by ground loops When the GROUND switch is in its in position pin 1 on the XLR is disconnected interrupting the ground on both channels between the input and output Interrupting the ground can help in some situations to reduce noise caused by ground loops XLR OUTPUT Each ProAV2 channel outputs a balanced 600 Ohm mic level signal that is compat ible with microphone snakes and mixing console preamps The output can drive long cables without appreciably noise or signal loss OPTIONAL J RAK The optional J RAK is a high density 2RU rack shelf for Radial DI s and splitters that allows up to 8 Radial devices to mount in one neat 19 package The DI s can be mounted with either the input side or output side facing the front Ideal for studio or touring Constructed of 14 gauge steel with a baked enamel finish OPTIONAL J CLAMP The optional J CLAMP can mount a single Radial device to virtually any surface Perfect for hiding away inside racks on podiums or under tables Constructed of 14 gauge steel with a baked enamel finis2. a gt A GRadial ERadial paaa fadia WAE in INPUT PANEL a ee Sri e e irc 4 INPUTS left and right stereo input for instruments 2 RCA INPUTS left and right stereo input for 10dB consumer audio electronics Le ProAV2 SPECIFICATIONS Frequency response 20Hz to 20kKHz 2 5dB Total harmonic distortion 0 01 THD 20Hz to 20kKHz Unbal high Z 3 5mm TRS input connection for stereo 10dB consumer audio electronics 4 15dB PAD reduces the input level by 15dB to prevent overload from HID OUIPUP GENIE Outputs Balanced 600 Ohm mic level pin 2 hot Oe enya input pad E toubleshoot ground loops when using None completely passive the ProAV2 with an AC power device 6 z 6 3 05 x5 x 1 875 like a keyboard Weight 1 8 Ibs ProAV2 Stereo Direct Box Users Guide LEFTAH OUTPUT PANEL LEFT amp RIGHT XLR OUTPUT balanced 600 ohm mic level output is 100 transformer isolated and compatiable with mic snakes and console preamps T GROUND disconnects pin 1 on the XLR output connector to reduce noise caused by ground loops CONSTRUCTION BOOK END DESIGN 14 gauge steel outer shell provides a protective zone for the switches and connectors FULL BOTTOM FOOT neoprene foam foot provides electrical isolation and plenty of friction to stay put I BEAM DESIGN inner steel enclosure is reinforced with l beam profile Eliminates stress that could torque the PC board and caus
3. ProAV2 if applied ProAV2 BLOCK DIAGRAM Follow the block diagram from the inputs on the left to the output on the right A really cool feature shown in the diagram is all the hi Z input jacks are paralleled together in stereo This makes any hi Z jack a handy patch point For example a CD player can be connected to the RCA jacks and the signal thru put by the jacks to a sub mixers line input The 3 5mm jack could also be used to send the CD signal to a computer sound card Radial Engineering ProAV2 User Guide 4 JACKS INSTRUMENTS Guitar bass and the output of effect pedals may be connected directly to the input jacks The signal may be thru put to the players on stage amplifier by using the same channel RCA jack and adaptor Left 2 gt MERON y l Guitar gt Right 14 e RCA Thru When connecting stereo instruments like synthesizers and drum machines the two jacks are used for the left and right channels The stereo signal may be accessed at the RCA or 3 5mm jacks and passed to sub mixers computer sound cards or on stage ampli fiers RCA amp 3 5mm JACKS Consumer electronics with an unbalanced 10dB output like CD and MP3 players may connect directly to the ProAV2 without cumbersome adaptors through the 3 5mm and RCA inputs The unbalanced inputs are paralleled together so any unused jacks may be used to thru put the signal to another device like a sub
4. e solder joint failure 1 MILITARY GRADE double sided PCB is bolted to steel standoffs for toughness RADIAL TRANSFORMER is protected from electromagnetic interfierence by a mu metal can 3 ISOLATED CONNECTORS are made from extremely tough glass filled nylon for true electrical isolation from chassis ground Radial Engineering ProAV2 User Guide Radial Engineering RADIAL LIMITED THREE YEAR TRANSFERABLE WARRANTY Radial Engineering a division of JP Cabletek Electronics Ltd warrants this product to be free from defects in material and workmanship and will remedy any such defects free of charge according to the terms of this warranty Radial Engineering will repair or replace at its option any defective component s of this product excluding the finish the bottom foam pad and wear and tear from normal use for a period of three 3 years from the original date of purchase In the event that a particular product is no longer available Radial Engineering reserves the right to replace the product with a similar product of equal or greater value To make a request or claim under this limited warranty the product must be returned prepaid in the original shipping container or equivalent to Radial Engineering or to an authorized repair centre and you must assume the risk of loss or damage A copy of the original invoice showing date of purchase and the dealer name must accompany any request for work to be performed u
5. features a Swiss army knife compliment of connectivity options making it the perfect DI for professional AV integrators and rental companies that regularly deal with a variety of system interface problems The Radial ProAV2 is equipped with standard instrument inputs for each channel making it easy to connect a stereo instrument or two mono ones Stereo RCA and 3 5mm jacks make it easy to connect 10dB audio devices like MP3 and CD players to a microphone snake and console preamp At the heart of the ProAV2 are two Radial transformers that perform level and imped ance conversion while isolating noise caused by ground loops Radial transformers are manufactured for optimum signal transfer and minimal insertion loss and are exceptional for their low distortion flat frequency response and ability to handle high input levels The transformer is sheilded in a mu metal can for protection against noise caused by electromagnetic fields It s heavy duty two piece steel enclosure is well suited for years of touring and rental use The ProAV2 is completely passive and does not require any power whatsoever to make it work Enjoy CONNECTING THE ProAV2 Before connecting the ProAV2 make sure the sound system is turned off and all lev els are set to zero This will avoid any pops in the sound system that could damage loudspeakers Also confirm that the GROUND PAD and LIFT buttons are in their out positions Phantom power will not damage the
6. h Radial Engineering ProAV2 User Guide
7. mixer or recorder RCA Left amp Right gt J PRO F 3 _ gt l i 3 5mm Thru _ i afore 15dB PAD The ProAV2 is equipped with a 15dB input PAD to prevent overload distortion when inter facing high output devices like CD players The PAD reduces the input to the left and right transformers and will not effect the level at the paralleled jacks TRANSFORMER ISOLATION The Radial transformers convert the hi Z input signals to a low Z mic level signal A major benefit of using transformers for signal conversion is the isolation the transformer provides by preventing the flow of ground currents between the ProAV2s input and it s output This transformer isolation effectively blocks hum and buzz caused by ground loops Radial Engineering ProAV2 User Guide LIFT RIGHT CHANNEL ONLY If the ProAV2 is used as two mono Dls a situation can arise where one source device needs a ground path through the ProAV2 but the other source does not This can occure when one source is AC powered and the other is not To accommodate this the right channel is equipped with a separate ground lift switch labeled LIFT Devices powered throught the AC mains should be plugged into the right channel When the LIFT switch is depressed the right channel ground is interrupted between the input and output while the left channel maintains a ground path through the ProAV2 HEZEAN Break loop here with LIFT switch
8. nder this limited warranty This limited warranty shall not apply if the product has been damaged due to abuse misuse misapplication accident or as a result of service or modification by any other than an authorized repair centre THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DESCRIBED ABOVE NO WARRANTIES WHETHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF THREE YEARS RADIAL ENGINEERING SHALL NOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE OF THIS PRODUCT THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY DEPENDING ON WHERE YOU LIVE ProAV2 User Guide Radial Engineering 1638 Kebet Way Port Coquitlam BC V3C 5W9 Tel 604 942 1001 Fax 604 942 1010 email info radialeng com Radial ProAV2 users guide V1 0 Part R870 1145 00 Subject to change without notice CONGRATULATIONS on your purchase of the Radial ProAV2 Radial products are easy to use and this short manual contains all the information you need to start using your ProAV2 right away For more information on the ProAV2 and other Radial products visit our web site www radialeng com OVERVIEW The Radial ProAV2 is a two channel stereo passive direct box This innovative DI
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