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Pass Labs XA100.8 Class A Monoblock Amplifier

The XA100.8 occupies a compelling position in the Pass Labs lineup, delivering the textural richness and harmonic completeness of pure Class A operation with enough power to control a wide range of loudspeakers. Its 100-watt output into 8 ohms is backed by a substantial 500-watt idle dissipation, ensuring the output stage remains deeply biased into Class A across demanding loads. This monoblock design provides the channel separation and authority that bring scale and ease to large-scale recordings.

Beyond its power delivery, the amplifier’s 200 damping factor and wide bandwidth contribute to a presentation defined by composure and low-level resolution. A quiet noise floor allows fine detail and spatial cues to emerge without artificial emphasis, while the high-current output stage maintains grip and texture in the bass region. The result is a component that preserves the distinct voice of the connected loudspeakers, adding a sense of headroom and natural bloom that serves long listening sessions well.

Highlights

  • ✓ Class / Type: Class A, Mono
  • ✓ Power: 100 W / 8 Ω (per channel)
  • ✓ Gain: 26 dB | Damping factor: 200
  • ✓ Input impedance: 50 kΩ (SE) / 100 kΩ (BAL)
  • ✓ Power (idle): 500 W | Weight: 99 lbs

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