Check the listing for details. Mayflower Electronics 02 Headphone Amplifier Pre-Owned Tested Working. Condition: Used. Listed at 149.99 USD. The Mayflower Electronics 02 Headphone Amplifier is a pre-owned piece of consumer electronics that is designed specifically for enhancing the sound quality of headphones. With its brand, model, and type, this amplifier is sure to provide a high-quality audio experience for users looking to improve their listening experience. Perfect for audiophiles or music enthusiasts looking to upgrade their home audio setup, the Mayflower Electronics 02 Headphone Amplifier offers a reliable and effective solution for enhancing sound clarity and depth. Pre-owned Tested and working A305