Pass Labs HPA-1
Technical specifications
| 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) | 23 |
| Unit Dimension (W x D x H) (In.) | 11 x 13.5 x 4 |
| Unit Weight (LBS) | 14 |
Awards & Reviews
“AudioQuest, and Master & Dynamic, JA declared that “in bass quality and authority, and in midrange transparency, the Pass Labs HPA-1 is without peer.””
Stereophile Recommended Components – 2022
“Also usable as a line-level preamp—it has a pair of single-ended RCA output jacks—the Pass Labs HPA-1 is a perfectionist-quality headphone amplifier that uses a MOSFET-based current-feedback amplifier to drive headphones ranging from 15 to 600 ohms.”
Stereophile Recommended Components – 2021
“To put it bluntly, Pass Labs HPA-1 is an exceptional, very addictive headamp/preamp combo every aficionado should at least audition once an opportunity strikes.”
HiFi Knights
” If I did not know that the HPA-1 was transistor-based, I would’ve been fooled: the HPA-1 had the natural warmth and slight fullness that mimic tubes.” ” In my view, headphone listening is about intimacy, and the HPA-1 is nearly perfect in this regard.”
HometheaterReview.com
“As far as headphones go, the HPA-1 is a brilliant amp which deserves every bit of praise I’ve thus far heaped on it.”
Part-Time Audiophile
