The TME-M750 has a built-in amplifier and speaker but we recommend for maximum quality, flexibility and privacy the usage of independent amplifiers and speakers or wired or wireless headphones. Especially Radio Headphones are highly recommended compared to Infrared headphones. We recommend the Sennheiser Models RS 4/6/8 that are prepared for 12V applications and offer an excellent sound quality - especially the RS 6/8. Above, you will find the wiring method of all three alternatives for audio output.