Now to get down to the reflowing. Put the tip of the soldering iron, onto each of the solder joins. When they melt (Aprox. 10 seconds using a 30 Watt soldering iron), add a little extra solder to the molten solder pool.

Once you have reflowed the solder joins, reassemble the amplifier and connect the speakers etc, to test if it has worked.

Don't hold the soldering iron on the circuit broad as you can damage it and the terminal block.