[Brody1231]

There could be a few reasons why you are not getting any sound after installing an aftermarket amplifier and speakers. Here are a few things to check:

1. Check your wiring: Make sure that all of your wiring is connected properly and securely. Check the wiring from the head unit to the line output converter, from the line output converter to the amplifier, and from the amplifier to the speakers. Make sure that all wires are connected to the correct terminals.
2. Check your settings: Check the settings on your head unit and amplifier. Make sure that the head unit is set to output to the line output converter, and make sure that the amplifier is set to the correct input channel.
3. Check your fuses: Check the fuses on your amplifier and head unit. Make sure that they are not blown.
4. Check your signal: Use a multimeter to test the signal at different points in your system. Make sure that you are getting a signal from the head unit, line output converter, and amplifier.

If none of these solutions work, you may want to consider taking your vehicle to a professional installer for further diagnosis.