Setting up Blaupunkt GTA-250

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Hello.

I would like to ask for help, regarding setting up the line level input of this amplifier, as it only shows the 0.1V and 8V marks.
How can i do that (i don't have it's manuals) without resorting to an oscilloscope?
The head-unit is a JVC GD-G701 with 2V line out.

Thank you
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.