One package consists of complete pre-amplifier and complete power-amplifier, which is an ultimate edition model, L-509u, resulting from seeking our principle, "One Body Separation" to the extreme level. The fully manualized amplifier without any electronic circuit such as microprocessor allows you to enjoy massive operability and has achieved intrinsic beautility as an audio device. L-509u is equipped with the pre-amplification circuit that transmits input signals with optimal impedance, the output circuit that drives a wide variety of speakers in a flexible manner, and strong power supply. This amplifier provides a separate grade in all stages, and is now close to the ideal of an integrated amplifier without the excuse of being multifunctional.