Class A Desktop Vacuum Tube Headphone AmpLifier

Digital-to-Analog Converter Pocket Size Headphone Amplifier — The DHM-1 is a 32 bit/384 kHz Hi Res audio DAC headphone amplifier offering 120 mW (milliwatts) power with a THD (Total Harmonic Distortion) of 93 dB and a Frequency Response of 20 Hz to 45kHz. Supported operating systems include Android 5/6 and above, Windows 7, 8, 8.1, 10 and above and Mac OS 10 and above. Supported file formats include flac, wav, aiff and ALAC. 

DAC FIRE USB Powered Headphone Amp with Built in Mic — The DAC includes a built in mic for recording and a USB cable for powered use. The DAC offers 30 mW (milliwatts) power with a THD (Total Harmonic Distortion) of <.009 a signal to noise ratio of db and frequency response hz. 

HA-1 Class AB Mini Headphone Amp with Bass Boost — At only 18 grams, the HA-1 offers a truly portable solution to high quality audio playback, offers 120 mW (milliwatts) power with a THD (Total Harmonic Distortion) of <.15 a signal to noise ratio of db and frequency response hz. * Available: Gunmetal or Silver. 

MicroTube Headphone Amp, the THA-8X offers 180 mW (milliwatts) power with a THD (Total Harmonic Distortion) of <.1, a signal to noise ratio of db and frequency response hz. 

The compact HA-3K offers 120 mW (milliwatts) power with a THD (Total Harmonic Distortion) of <.15 a signal to noise ratio of db and frequency response hz.  

THA-30A Headphone Amplifier with Vacuum Tube and Bass Boost — The palm sized THA-30X offers 140 mW (milliwatts) power with a THD (Total Harmonic Distortion) of <.1 a signal to noise ratio of db and frequency response hz.