Pass Labs HPA-1 Headphone Amplifier
Pass Labs HPA-1 Headphone Amplifier

HPA-1 Headphone Amplifier

Great sounding headphone amplifier from PASS Labs

3 Years




The HPA-1 headphone amplifier was designed ground-up to become what we believe is one of the very best sounding headphone amplifiers available today. With low feedback, wide bandwidth and a direct coupled MOSFET output stage, this musical instrument drives even the most difficult headphone loads with ease, power and grace. The HPA-1 also functions as a line-level preamplifier that sonically rivals much higher-priced competition. The measured performance is superb and the sound even better.

“Enter the Pass Labs HPA-1: it’s a powerful and versatile, standout headphone amp that can double as a superb preamplifier for a two channel speaker system. Boasting the iconic and minimalistic machined aluminum chassis typical of Pass Labs, it delivers a deeply satisfying, vivid, and robust aural experience.” – Positive-Feedback Review – 2023

Gain (dB)
8 db

Frequency Response
10hz – 100k -1 dB

Output Power into 20 ohms
3500 mW

THD + Noise
< 0.005 at 1V out

Out Power into 300 ohms
200 mW

Input Impedance
50K Ohm

Output Impedance
< 2 ohms

Power Consumption (Watts)

Unit Dimension (W x D x H) (In.)
11 x 13.5 x 4

Unit Weight (LBS)