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Power amplifiers mono — Pass Labs XA100.8
Description, images, technical data and specifications
Pass Labs XA100.8
Image source — © Pass Labs
The XA100.8 is a Class A monoblock power amplifier from Pass Labs, sitting below the XA 160.8 with a more modest output power. The XA100.8 brings Pass Labs's most storied Class A engineering heritage to a more accessible monoblock format.
Key specs that matter
Input impedance is 100,000 ohms balanced or 50,000 ohms single-ended, matching the rest of the XA series. Output power is 100W into 8 ohms, rising to 200W into 4 ohms - more modest than the XA 160.8's 160W. Gain is 26dBu, matching. Frequency response spans an exceptionally wide 1.5Hz to 100,000Hz within plus-or-minus 3dB, also matching. Total harmonic distortion plus noise is 1%. Damping factor is 200, also matching. At 483 x 540 x 230mm and 45kg, the XA100.8 maintains a genuinely more accessible Class A monoblock chassis than the XA 160.8.
Sound and use context
Expect the exceptionally rich, harmonically resonant character pure-Class-A amplification is broadly celebrated for, delivered at a more accessible entry point into Pass Labs's celebrated XA-series catalogue.
Pairing
As a monoblock, two units are needed for a stereo pair, and Pass Labs's own XP-17 phono stage offers a natural, brand-coherent pairing.
Alternatives
Pass Labs's own XA 160.8 offers a more accomplished alternative within the same broader XA-series catalogue. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market. Recommended overall. A dependable choice worth shortlisting at this price point in the current market. Recommended overall.
Key specs that matter
Input impedance is 100,000 ohms balanced or 50,000 ohms single-ended, matching the rest of the XA series. Output power is 100W into 8 ohms, rising to 200W into 4 ohms - more modest than the XA 160.8's 160W. Gain is 26dBu, matching. Frequency response spans an exceptionally wide 1.5Hz to 100,000Hz within plus-or-minus 3dB, also matching. Total harmonic distortion plus noise is 1%. Damping factor is 200, also matching. At 483 x 540 x 230mm and 45kg, the XA100.8 maintains a genuinely more accessible Class A monoblock chassis than the XA 160.8.
Sound and use context
Expect the exceptionally rich, harmonically resonant character pure-Class-A amplification is broadly celebrated for, delivered at a more accessible entry point into Pass Labs's celebrated XA-series catalogue.
Pairing
As a monoblock, two units are needed for a stereo pair, and Pass Labs's own XP-17 phono stage offers a natural, brand-coherent pairing.
Alternatives
Pass Labs's own XA 160.8 offers a more accomplished alternative within the same broader XA-series catalogue. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market. Recommended overall. A dependable choice worth shortlisting at this price point in the current market. Recommended overall.
Specifications
Model name
XA100.8
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
100 000
Input impedance (single-ended) (Ω)
50 000
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
100
Output power (4Ω) (W)
200
Gain (dBu)
26
Frequency response low +/- 3dB (Hz)
1.5
Frequency response high +/- 3dB (Hz)
100 000
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
1
Max power consumption (W)
N/A
Damping factor
200
Dimensions (mm)
483 × 540 × 230
Weight (kg)
45
Official link
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