Instructions for PAC models including: LPA-1.4 Line Output Converter Gain Level Set-Up, LPA-1.4, Line Output Converter Gain Level Set-Up, Converter Gain Level Set-Up, Gain Level Set-Up, Level Set-Up, Set-Up

TT-LPA-GAIN-ADJ 040721

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Line Output Converter Gain Level Set-Up

Advanced method ­
Required items: · Digital Multi-Meter · Test track media @ 1kHz and 100Hz. (Download from PAC-Audio website's LPA section)

Proper level adjustment is crucial for obtaining the best possible sound quality. Following the guidelines below will enable you to properly set the output gain of the LPA using equipment that is readily available.

your target setting you will read on the multi-meter.

. This max line-level input will be

Perform the following procedure for each LPA you are installing.

1. Start with gain adjustment levels on LPA set to minimum.

off any loudness or other signal processing features (preset EQ). 3. Turn source unit to maximum volume and start test track (1kHz for mid/high or full range, 100Hz for sub). If Bluetooth is used as source, make sure the device volume is set to maximum. 4. Choose either left or right channel - With multi-meter, test output of LPA front channels. Probe with negative on RCA shield and positive in center of RCA output.

gain level if clipping light turns on.

requirements). 7. Turn volume down and system off.

Example scenarios:
voltage from the LPA. -
age from the LPA.
Basic method ­
2. Turn head unit to ¾ maximum volume and play test track (Random Noise) or a familiar song that has dynamic attributes. For example, if your volume goes to 40 you will turn it up to 30 and play a song that has some quiet sections and some really loud sections. 3. Slowly adjust front channel gain of LPA until just a hint of distortion is audible, and then back down gain just under that threshold and the distortion goes away. 4. Repeat steps 1-3 for rear channels.
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References

• PAC-Audio