The X150.8 is all about balance: speed and sweetness, punch and finesse. It brings the grip and dynamic confidence of Class AB while preserving the tonal honesty and low-level nuance Pass Labs is known for.
It’s a powerful, highly musical stereo amplifier that works beautifully across a wide range of speakers—especially when you want authority without giving up texture.
The character is confident but never sharp: transients are clean, bass is controlled, and the midrange stays richly communicative. The X150.8 is a strong foundation for real-world systems because it plays to music first—making your speakers sound more composed, more dimensional, and more enjoyable at any volume.
SPECS AT A GLANCE
- Class / Type: Class AB, Stereo
- Power: 150 W / 8 Ω (per channel)
- Gain: 26 dB | Damping factor: 150
- Power (idle): 370 W | Weight: 88 lbs
A Pippen of a Component – the Pass Labs X150.8 Stereo Amplifier
“The Pass Labs X150.8 has served as a reference amplifier in numerous audio reviews and performed admirably with its combination of power, detail, natural tonal balance, and accuracy compared with other amplifiers…”
Positive Feedback – 2025
2024 Positive Feedback Writers’ Choice Awards
“…the Pass Labs’ X250.8 Stereo Amplifier and came away very impressed with its balanced combination of power, warmth, and finesse.”
Positive Feedback
Positive Feedback Award
| Class | AB |
| Type | Stereo |
| Gain (dB) | 26 |
| Full Pwr @ 26 dB gain (V) | 1.73 |
| Low Frequency Response | 1.5 Hz |
| High Frequency Response | 100 KHz |
| Power Output /ch (8 ohm) | 150 |
| Input Impedance (SE & BAL Kohms) | 50/100 |
| Damping Factor | 150 |
| Power Consumption @ Idle (Watts) | 370 |
| Unit Dimension (W x D x H)(In.) | 19 x 21.25 x 7.5 |
| Unit Weight (LBS) | 88 |
| Class | AB |
| Type | Stereo |
| Gain (dB) | 26 |
| Full Pwr @ 26 dB gain (V) | 1.73 |
| Low Frequency Response | 1.5 Hz |
| High Frequency Response | 100 KHz |
| Power Output /ch (8 ohm) | 150 |
| Input Impedance (SE & BAL Kohms) | 50/100 |
| Damping Factor | 150 |
| Power Consumption @ Idle (Watts) | 370 |
| Unit Dimension (W x D x H)(In.) | 19 x 21.25 x 7.5 |
| Unit Weight (LBS) | 88 |
A Pippen of a Component – the Pass Labs X150.8 Stereo Amplifier
“The Pass Labs X150.8 has served as a reference amplifier in numerous audio reviews and performed admirably with its combination of power, detail, natural tonal balance, and accuracy compared with other amplifiers…”
Positive Feedback – 2025
2024 Positive Feedback Writers’ Choice Awards
“…the Pass Labs’ X250.8 Stereo Amplifier and came away very impressed with its balanced combination of power, warmth, and finesse.”
Positive Feedback
Positive Feedback Award