Used Headphone amplifiers

iFi Audio ZEN CAN Signature

gain switch, Bass Boost

FiiO KA17

gain switch, USB-DAC

FiiO BTR15

USB-DAC, Display, gain switch, Microphones, Tone control, Bluetooth

FiiO Q11

gain switch, USB-DAC

FiiO KA2

USB-DAC

iFi Audio uno

USB-DAC, gain switch

iFi Audio ZEN CAN 3

gain switch, Bass Boost

Terratec HA-1 batch

Bass Boost, Powerbank

RME Audio ADI-2 DAC FS

Display

Lehmann Audio Drachenfels

RME Audio RME ADI-2/4 Pro SE AD/DA converter with microfibre cloth

iFi Audio hip-dac2 gold edition

NUX Headphone amplifier

Bluetooth

Blackstar Amplug 2 FLY headphone amplifier for electric guitar with headphones

TEAC UD-505-X/B USB DAC Headphone Amplifier

Bluetooth