Pass Labs
INT-60 Integrated Amplifier
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Features
60 Watts per Channel: Provides 60 watts of power per channel into 8 ohms, suitable for a wide range of speakers.
Symmetrical Circuitry: Ensures balanced and accurate audio reproduction, capturing fine musical details.
High-Quality Components: Meticulously selected components contribute to the amplifier's exceptional sound clarity and dynamics.
Built-in Preamplifier: Features a built-in preamplifier section for added convenience and versatility.
Balanced (XLR) and Single-Ended (RCA) Inputs: Offers both balanced and single-ended inputs for flexible connectivity options.
Precision Volume Control: Features precise volume control for fine adjustments to suit individual listening preferences.
Robust Power Supply: Equipped with a robust power supply for stable and reliable performance, even with demanding speakers.
Large Heat Sinks: Includes large heat sinks to dissipate heat efficiently, ensuring optimal performance over extended listening sessions.
Minimalist Design: Boasts a clean and minimalist design that reflects Pass Labs' commitment to simplicity and performance.
Efficient Loudspeaker Compatibility: Ideal for use with a wide variety of loudspeakers, providing engaging and detailed sound reproduction.
Reliable Performance: The INT-60 amplifier is designed for reliability and long-term performance, requiring minimal adjustments.
Musicality: Known for its musicality, the INT-60 amplifier allows listeners to fully immerse themselves in the nuances of their favorite music.
Exceptional Transparency: Delivers exceptional transparency and clarity, allowing the listener to hear every detail in the music.
Solid-State Design: Offers the benefits of solid-state amplification, including efficiency, reliability, and stable performance.
What's in the Box?
Warranty
The Pass Labs INT-60 integrated amplifier is a pinnacle of audio engineering that combines power, precision, and musicality in a single chassis. The INT-60 is a robust integrated amplifier capable of delivering 60 watts per channel into 8 ohms, showcasing Pass Labs' renowned Class A/B topology for exceptional sound quality. Its symmetrical circuitry and meticulously selected components ensure pristine audio reproduction with breathtaking dynamics. Equipped with a built-in preamplifier section, the INT-60 offers versatile connectivity options including balanced (XLR) and single-ended (RCA) inputs. With its minimalist design, robust build quality, and exceptional performance, the Pass Labs INT-60 is a true centerpiece for audiophiles seeking uncompromising sound quality and convenience in their audio systems.
Dragon Cable Recommendation: we recommend pairing the INT-60 integrated amplifier with our award-winning Silver Dragon Interconnects. The Silver Dragon Interconnect is one of our best-selling cables at Moon Audio. Sold in Pairs, it is our top-of-the-line silver conductor-based interconnect. With a braided geometry and amazing shielding, this interconnect is a remarkable solution where noise isolation is key. The Blue Dragon Power Cable is also recommended to provide the cleanest and unbridled power to your high-end amplifier.
The Pass Labs INT-60 integrated amplifier represents a significant leap forward in audio technology, blurring the once-distinct line between separate components and integrated units. This groundbreaking device challenges long-held assumptions about the limitations of integrated amplifiers, offering performance that rivals—and in some cases surpasses—traditional separate pre-amp and power amp configurations. At the heart of the INT-60 lies a powerhouse capable of delivering a substantial 60 watts per channel into 8-ohm loads. However, raw power is only part of the story. What sets this amplifier apart is its high-bias design, which allows it to operate in pure Class A mode up to an impressive 30 watts. This extended Class A envelope is a game-changer, providing a wider range of distortion-free, harmonically rich amplification that audiophiles crave.
The benefits of this design philosophy are multifaceted. By remaining in Class A operation for a larger portion of its power output, the INT-60 maintains lower distortion levels across a broader range of listening volumes. This translates to cleaner, more accurate sound reproduction, especially in the critical midrange where much of music's emotional content resides. Furthermore, the extended Class A operation contributes to improved control over loudspeakers, resulting in tighter bass, more precise imaging, and a more expansive soundstage. Pass Labs has left no stone unturned in the pursuit of sonic excellence. The INT-60's circuitry has been meticulously crafted using only the highest quality components, each selected for its sonic characteristics as well as its reliability. The power supply is overbuilt, ensuring stability even under demanding conditions and contributing to the amplifier's ability to drive a wide range of speaker loads with ease.
The preamplifier section of the INT-60 is no afterthought. It incorporates technologies derived from Pass Labs' acclaimed standalone preamplifiers, providing a transparent and low-noise front end that preserves the delicacy and nuance of the source material. Multiple inputs, including balanced XLR connections, offer flexibility for integrating various high-end sources. Physically, the INT-60 is a testament to Pass Labs' commitment to the build quality. Its robust chassis, precision-machined front panel, and substantial heat sink not only serve functional purposes but also convey a sense of permanence and luxury befitting a high-end audio component.
In real-world listening, the INT-60 reveals its true character. It possesses the ability to render complex musical passages with ease, maintaining clarity and separation even during crescendos. The amplifier's low noise floor allows for the emergence of subtle details, breathing new life into familiar recordings. From the deepest bass notes to the airiest highs, the INT-60 maintains a sense of coherence and musicality that invites extended listening sessions. For audiophiles seeking to simplify their systems without compromising on sound quality, the Pass Labs INT-60 offers a compelling solution. It distills decades of amplifier design expertise into a single, elegant package that promises to elevate the listening experience. Whether paired with efficient speakers or more demanding loads, the INT-60 stands ready to reveal the full depth and emotion of your music collection, setting a new benchmark for what an integrated amplifier can achieve.
As you move up the INT lineup from the INT-25 to the INT-60 you'll hear more gravitas to the sound. Larger soundstage, better dynamics, and a more impactful musical presentation. The INT-60 has more slam, faster sonic deliveries, and a greater sense of dynamic scale than the INT-25, and even more so as you move up to the INT-250.
Pass Labs and First Watt
Pass Labs and First Watt were founded by hi-fi legend Nelson Pass. After co-founding and later selling Threshold Audio, Pass began working out of his Auburn, California, home in the early 1990s to develop prototypes of single-ended Class A amplifier designs under the name Pass Labs. Pass Labs quickly became known for its commercially produced Aleph, X, and XA Series amps, and preamps. Pass later started First Watt as a passion project focusing on low-power amps for a niche audiophile audience. Today, Pass splits his time between the two companies, with production happening in Pass Labs' facility in Foresthill, California, USA. Some of Pass Lab’s most notable products include the HPA-1 Headphone Amplifier, their integrated amp series (featuring the Pass Labs INT-25, Pass Labs INT-60, and the Pass Labs INT-250), the Pass Labs XA25, and more. If you’re looking for a monoblock amplifier, stereo amplifier, integrated amplifier, or headphone amplifier, then Pass Labs has everything you need for your high-end audio. Visit passlabs.com for more info.
Features:
- Class A/B Topology: Utilizes Pass Labs' renowned Class A/B topology for outstanding sound quality and low distortion.
- 60 Watts per Channel: Provides 60 watts of power per channel into 8 ohms, suitable for a wide range of speakers.
- Symmetrical Circuitry: Ensures balanced and accurate audio reproduction, capturing fine musical details.
- High-Quality Components: Meticulously selected components contribute to the amplifier's exceptional sound clarity and dynamics.
- Built-in Preamplifier: Features a built-in preamplifier section for added convenience and versatility.
- Balanced (XLR) and Single-Ended (RCA) Inputs: Offers both balanced and single-ended inputs for flexible connectivity options.
- Precision Volume Control: Features precise volume control for fine adjustments to suit individual listening preferences.
- Robust Power Supply: Equipped with a robust power supply for stable and reliable performance, even with demanding speakers.
- Large Heat Sinks: Includes large heat sinks to dissipate heat efficiently, ensuring optimal performance over extended listening sessions.
- Minimalist Design: Boasts a clean and minimalist design that reflects Pass Labs' commitment to simplicity and performance.
- Efficient Loudspeaker Compatibility: Ideal for use with a wide variety of loudspeakers, providing engaging and detailed sound reproduction.
- Reliable Performance: The INT-60 amplifier is designed for reliability and long-term performance, requiring minimal adjustments.
- Musicality: Known for its musicality, the INT-60 amplifier allows listeners to fully immerse themselves in the nuances of their favorite music.
- Exceptional Transparency: Delivers exceptional transparency and clarity, allowing the listener to hear every detail in the music.
- Solid-State Design: Offers the benefits of solid-state amplification, including efficiency, reliability, and stable performance.
What's in the Box?
- INT-60 Integrated Amplifier
- Power Cable
- Manual and Warranty
F.A.Q.
What is the power output of the Pass Labs INT-60 Integrated Amplifier?
The Pass Labs INT-60 Integrated Amplifier delivers 60 Watts per channel into 8 ohms. This ample power output, combined with its Class A operation, ensures robust and dynamic performance with a wide range of speakers. The INT-60 is designed to drive both efficient and moderately demanding speaker loads with ease, providing a detailed and engaging listening experience.
What are the key features of the Pass Labs INT-60 Integrated Amplifier?
The Pass Labs INT-60 is packed with features that cater to audiophiles seeking exceptional sound quality. It boasts a fully balanced input stage and a high-current, Class A output stage for low distortion and musicality. The INT-60 includes a precision-stepped volume control for accurate level adjustments, as well as a headphone output for private listening. It also offers a remote control for convenience and a home theater bypass mode for integration into multi-channel setups.
Can the Pass Labs INT-60 drive a variety of speakers, including more demanding loads?
Yes, the Pass Labs INT-60 Integrated Amplifier is designed to handle a wide range of speakers, including those with moderate to demanding loads. Its 60 Watts per channel into 8 ohms provides ample power for most speaker setups, delivering dynamic and detailed sound reproduction. The Class A operation ensures a clean and musical presentation, making it well-suited for audiophiles with a diverse range of speaker preferences.
Does the Pass Labs INT-60 require any special considerations for setup or maintenance?
The Pass Labs INT-60 Integrated Amplifier is designed for user-friendly operation and relatively straightforward setup. It does not require bias adjustments, as it is a self-biasing Class A design. However, users should ensure proper ventilation for optimal performance, as Class A amplifiers can generate heat. Adequate ventilation will help maintain the amplifier's performance and longevity. Additionally, it is recommended to provide sufficient space around the amplifier for airflow and to follow Pass Labs' guidelines for safe and optimal operation.
Who is Nelson Pass?
Nelson Pass, the man behind Pass Labs and First Watt, has been designing and building amplifiers for decades. His early passion, however, was speakers; at age 14, he started assembling loudspeakers. As a college student studying physics at the University of California-Davis, he co-founded a speaker company called PMA. He also worked for ESS, where he designed crossovers and enclosures. After college, with his interest having shifted toward amplifiers, Pass co-founded Threshold Electronics (now Threshold Audio). His achievements during the Threshold years include developing the first dynamically biased Class A amplifier circuit; developing a fully cascode audio power amplifier; and developing the STASIS stereo preamplifier and power amplifier. During the 1980s, Pass designed the Adcom GFA-555 amplifier. Later, after selling Threshold, he started Pass Labs in 1991 and First Watt in 1997. Pass holds several patents related to audio circuits.
How did Pass Labs make its name?
Pass Labs helped popularize solid-state, Class A power amplifiers. Pass Labs' first product, the Aleph 0 amplifier, operated as a single-ended Class A up to its 70-watt rating and in push-pull Class A at higher wattage. The Aleph series of amplifiers, some of the first solid-state amps that were said to be "tube-like" in sound, operated pure class A and contained internal circuitry using MOSFETs. The Aleph amplifiers had a unique appearance, a cube with heat sinks on all four sides, a solution to the heat generated by the class-A design. This can be attributed primarily to the specific MOSFETs used and the minimum number of gain stages that were implemented in the design. Pass Labs also developed the Super-Symmetry™ ("Su-Sy") circuit, which achieves exceptionally low distortion and noise levels. In 1998, Pass Labs released the X1000, the first amplifier using the patented SuperSymmetric™ topology. The X1000 achieved 1000 watts with high performance, local feedback, and only two gain stages: a cascaded differential pair of transistors and a large bank of complementary output followers. This groundbreaking design informed all subsequent Pass Labs amplifiers.
What else does Pass Labs make?
In 2002, Pass Labs unveiled the first XA amplifiers, combining the X and Aleph topologies into balanced single-ended Class A amplifiers with many of the characteristics of both the X and Aleph series. The current Pass Labs lineup includes Class A amps (XA and Xs Series), Class AB amps (.8 Series), line preamps (Xs and XP Series), phono preamps (Xs and XP Series), integrated amps (INT Series), and one headphone amp.
What is the relationship between Pass Labs and First Watt?
When he started Pass Labs, Pass did everything out of his home. In 1997, having outgrown the space, Pass Labs moved into commercial space in Foresthill, California. When Pass started First Watt, it was a "kitchen table" venture, with work once again happening in his home. In 2016, with production demands not leaving him enough time to pursue the vast array of yet-to-be-designed amps, Nelson handed the business end of First Watt over to Pass Labs. Pass Labs took over the building of First Watt amplifiers as well as marketing and distribution. There's a synergy between the two operations, in that Pass Labs gets to gather up some of the more interesting First Watt finds and repurpose them as more commercially viable designs. Today, Pass splits his time between First Watt and Pass Laboratories.
| Parameter | Specification |
|---|---|
| Physical Specifications | |
| Dimensions (W × D × H) | 19" × 21.2" × 7.6" |
| Weight | 93 lbs |
| Operating Temperature | 53°C |
| Technical Specifications | |
| Amplifier Class | AB |
| Type | Stereo |
| Gain | 29/35 dB |
| Volume Control | 63 dB Range (1 dB Steps) |
| Remote Control | Yes |
| Inputs | 4 |
| Outputs | 2 |
| Input Impedance (per leg) | 45 kΩ |
| Power Consumption | 375 Watts |
| Audio Specifications | |
| Power Output per Channel (8 ohms) | 60 Watts |
| Frequency Response | -6 dB @ 80 kHz |
| Total Harmonic Distortion (1 kHz, Full Power) | 1% |
| Damping Factor | 150 |
| Output Noise | < 250 μV |
- JLJose L. G.Rated 5 out of 5 stars11 months agoPass Labs INT-60, what a beast!
The Pass Labs INT-60 is not cheap, but it is one of the most powerful and beautiful-sounding integrated amplifier I have heard in my 40+ years as an audiophile. With the typical high current output design, it controls any speaker with ease, and with 30 watts out of its 60 watts per channel in pure Class A you will hardly abandon this beautiful, warm, and silky Class A sound. Its sound is authoritative, clean, and detailed, like an iron fist with a velvet glove.
- DBDavid B.Rated 5 out of 5 stars2 years agoMy best amp ever: Pass Labs INT-60
The Pass Labs INT-60 is simply the best amp I’ve ever owned. It’s given me the Pass Labs sound with more muscle and dynamics, more control over my speakers, more bass control, a bigger more impactful and fuller sound, that I was craving for. This was a worthwhile upgrade for me from my previous Pass Labs INT-25 amp. A totally different animal. A true reference.
- ALAlexander L. C.Verified BuyerRated 5 out of 5 stars5 years agoINT-60 Integrated Amplifier
Very good sound remarkable for the price point!