I tried to get the speaker on LED brighter, but I did not succeed. I think the relay has a big resistance as well. I have 29V on the rail, I put the 8.2K resistor in parallel with a 2Kohm one, but still dim light. The LED is a white 3.1 Volt/20 mAmp. A LED calculator on the internet advises 1.5kohm /2W, but there is also the 120 ohm one in line with the relais.
Did anyone succeed in modding the LED circuit with a bright white led?