![](https://www.radialeng.com/wp-content/uploads/2018/05/proav1_2-hirez-768x586.jpg)
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1/4" Input
Instrument input connection to the ProAV1.
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3.5mm TRS
-10dB stereo input connects PC sound cards and headphone jacks.
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RCA Thru
Thru-put from the ProAV1 to the amp. Hi impedance will not load instrument down.
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RCA Input
Stereo input can be used with CD players, tape decks, VCRs, etc. A second set of RCA jacks can be used as a thru-put.
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-10dB Pad
Reduces input level from high output devices like CD players and headphone outputs.
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![](https://www.radialeng.com/wp-content/uploads/2018/05/proav1_3-hirez-768x595.jpg)
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XLR +4dB Line Input
Connection for professional audio sources.
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Ground Lift
Disconnects the ground path at the XLR output.
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XLR Output
Balanced 600Ω mic level output, feeds mixer or mic preamp.
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