The INT-25 is the integrated for purists: fewer stages, fewer parts, more connection. It takes the spirit of a minimalist Class A amplifier and pairs it with a clean, simple line stage—so the system feels immediate, fast, and emotionally direct.
This is subtraction as a philosophy: remove what you don’t need, elevate what you came for. The result is an integrated that feels alive—especially with efficient loudspeakers and real-world rooms.
The INT-25’s magic is how it communicates nuance at everyday volume. Vocals sit “in the room,” guitars have body and shimmer, and timing feels locked-in without sounding hyped. If you value simplicity, musical truth, and a one-box solution that still feels genuinely high-end, the INT-25 is a beautiful match.
SPECS AT A GLANCE
- Class / Type: Class A, Stereo
- Power: 25 W / 8 Ω (per channel)
- Inputs: 3 | Outputs: 0 | Remote: Yes
- Gain: 29/35 dB | Volume control: 63 dB (1 dB steps)
- Power consumption: 200 W | Weight: 49 lbs
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“Philosophy of Subtraction Design This philosophy of “subtraction design” can be seen everywhere on INT-25. The pursuit of simplicity is beauty. Using a simpler gain amplifier stage can improve the response speed and work stability of the circuit. For voltage amplification, a higher bias voltage can be set, so that the amplification circuit is in a pure Class A working state. Of course, this simple pure class A amplifier circuit sacrifices output power. If you need more output power, Pass has many power amplifiers for you to choose from, but you have to pay several times the price to have it.”
Taiwanese Review from U-Audio
“INT-25 is essentially a Pass XA25 power amp—class-A push-pull without degenerative feedback and offering 25Wpc—wedded to a minimalist line-level preamp.”
Stereophile Recommended Components – 2022
“To HR, who prefers integrateds over separates yet wouldn’t even consider buying an amp with a built-in DAC—”Why would I pollute a fine audio component with a non-upgradable and possibly third-rate ancillary?”—the Pass INT-25 emerged as an ideal component.”
Stereophile Recommended Components – 2021
“In addition to the fact that it is designed and manufactured by Pass Laboratories, there are quite a few other reasons why the INT-25 is not an average integrated amplifier. Most notably, the INT-25 amplifier circuit is Class A. For the uninitiated, this is the most inefficient type of amp circuit there is. Very simply explained, most linear amplifier circuits are Class A/B, where they run in Class A at very low output, then kick into Class B for the majority of its operation.”
Best of 2021 Blue Note Award – “Enjoy the Music”
“Pass Labs INT-25 – CLASS A Review”
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HiFi Vido Test / Ernst Neve – The Netherlands
| Class | A |
| Type | Stereo |
| Gain (dB) | 29/35 |
| Volume control (1dB steps) | 63dB |
| Remote | yes |
| Inputs | 3 |
| Outputs | 0 |
| Power Output /ch (8 ohm) | 25 Watts |
| Power Consumption (W) | 200 |
| Standby Power Consumption (W) | <1 |
| Dimensions (W x H x D) | 17 x 17.375 x 6 |
| Weight (LBS) | 49 |
| Class | A |
| Type | Stereo |
| Gain (dB) | 29/35 |
| Volume control (1dB steps) | 63dB |
| Remote | yes |
| Inputs | 3 |
| Outputs | 0 |
| Power Output /ch (8 ohm) | 25 Watts |
| Power Consumption (W) | 200 |
| Standby Power Consumption (W) | <1 |
| Dimensions (W x H x D) | 17 x 17.375 x 6 |
| Weight (LBS) | 49 |
Recommended Components Fall 2023 Edition – Integrated Amplifiers
Stereophile
Stereophile Recommended Components – 2022
Stereophile.com
Best of 2021 Blue Note Award – “Enjoy the Music”
Enjoy the Music
Stereophile Recommended Components – 2021
Stereophile
Stereophile Recommended Components – 2020
Stereophile
“Philosophy of Subtraction Design This philosophy of “subtraction design” can be seen everywhere on INT-25. The pursuit of simplicity is beauty. Using a simpler gain amplifier stage can improve the response speed and work stability of the circuit. For voltage amplification, a higher bias voltage can be set, so that the amplification circuit is in a pure Class A working state. Of course, this simple pure class A amplifier circuit sacrifices output power. If you need more output power, Pass has many power amplifiers for you to choose from, but you have to pay several times the price to have it.”
Taiwanese Review from U-Audio
“INT-25 is essentially a Pass XA25 power amp—class-A push-pull without degenerative feedback and offering 25Wpc—wedded to a minimalist line-level preamp.”
Stereophile Recommended Components – 2022
“To HR, who prefers integrateds over separates yet wouldn’t even consider buying an amp with a built-in DAC—”Why would I pollute a fine audio component with a non-upgradable and possibly third-rate ancillary?”—the Pass INT-25 emerged as an ideal component.”
Stereophile Recommended Components – 2021
“In addition to the fact that it is designed and manufactured by Pass Laboratories, there are quite a few other reasons why the INT-25 is not an average integrated amplifier. Most notably, the INT-25 amplifier circuit is Class A. For the uninitiated, this is the most inefficient type of amp circuit there is. Very simply explained, most linear amplifier circuits are Class A/B, where they run in Class A at very low output, then kick into Class B for the majority of its operation.”
Best of 2021 Blue Note Award – “Enjoy the Music”
“Pass Labs INT-25 – CLASS A Review”
audiophilepure.com
HiFi Vido Test / Ernst Neve – The Netherlands