Used items in Headphone amplifiers

Fosi Audio K5 Pro

Bass Boost

FiiO BTR17

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

FiiO K7

gain switch, USB-DAC

iFi Audio Zen Dac 3

Bass Boost, USB-DAC

FiiO R7

Display, USB-DAC, Bluetooth, Wi-Fi

Fosi Audio K7

Display, Tone control, Bluetooth

FiiO K13 R2R

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

Fosi Audio SK01 Kopfhörerverstärker und Preamp

gain switch

Fosi Audio P3

Tone control, aptX, Bluetooth

FiiO K11 R2R

Display, gain switch, USB-DAC

FiiO K11

Display, gain switch, USB-DAC

FiiO KA17

gain switch, USB-DAC

FiiO BTR15

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

FiiO Jiezi A

Tone control, USB-DAC

FiiO K15

Display, gain switch, Tone control, USB host, USB-DAC, Bluetooth, Wi-Fi