I want to use the output from an MP3 player to go to a loudspeaker, to broadcast bird song in the field - photography is the name of the game. I am told that the output from the MP3 is too weak to go direct to a loudspeaker, so needs boosting. Lokking at the Maplin (UK) site they list a universal pre-amp (N69AW) which seems to have four wires, and a number of amplifiers again each with four wires. Is this a simple matter of connecting the output from the MP3 to the input of the preamp; output from the preamp to the input of the amp, and the output from the amp to the loudspeaker.
As I say, the unit is to be used in the field, so will be battery powered and I would like to have a reasonable range of volume. One unit that is listed runs on 6v- 16v, will the voltage influence volume! It also suggests a 10k log pot for volume control - placed between the signal source and amp, would this be between the pre-amp and amp?