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Car Audio Equipment
Head Units
Head unit distortion
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<blockquote data-quote="ThxOne" data-source="post: 8817957" data-attributes="member: 675210"><p>Alpine says the Maximum Pre-Out voltage is 4v. You can test this in a primitive way with a VERY cheap harbor freight red multimeter. Set EVERYTHING flat in the head unit, EQ's, bass boost, loudness off. Send that 1Khz 0db tone through the head unit and with a multimeter test the RCA out's of the head unit turning up the volume until the meter reads 4V. Look at the volume level your head unit is at. That's your max undistorted volume. To be safe, back it off one click. Do the same for your Sub out as well but use a 40hz tone. If the volume is lower than the other RCA's then use the lower volume number. If it is higher, use the lower volume number.</p></blockquote><p></p>
[QUOTE="ThxOne, post: 8817957, member: 675210"] Alpine says the Maximum Pre-Out voltage is 4v. You can test this in a primitive way with a VERY cheap harbor freight red multimeter. Set EVERYTHING flat in the head unit, EQ's, bass boost, loudness off. Send that 1Khz 0db tone through the head unit and with a multimeter test the RCA out's of the head unit turning up the volume until the meter reads 4V. Look at the volume level your head unit is at. That's your max undistorted volume. To be safe, back it off one click. Do the same for your Sub out as well but use a 40hz tone. If the volume is lower than the other RCA's then use the lower volume number. If it is higher, use the lower volume number. [/QUOTE]
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