This amplifier module achieves peak power at an operating voltage of 12 Vdc with a 4ø loudspeaker. With lower voltages & higher resistance loudspeakers power will increase accordingly. In order to control the volume a 10kø logarithmic potentiome This amplifier module achieves peak power at an operating voltage of 12 Vdc with a 4 Omega loudspeaker. With lower voltages & higher resistance loudspeakers power will increase accordingly. In order to control the volume a 10k Omega logarithmic potentiometer Order Code JM77J should be connected between the signal source amp the amplifier module. If the signal source has a low output power e.g. a microphone it will be necessary to connect a pre-amplifier i.e. Order Code N69AW between the source amp the potentiometer. Specifications Outputmaximum 3.5W music power Operating voltage 4.5-12 Vdc Loudspeaker connection 4-16 Omega Input sensitivity 80m V Frequency responseapprox. 40-20000 Hz Dimensionsapprox. 40 x 40 x 12mm