Laiv Harmony HP2A – High-End Balanced Class A Headphone Amplifier and Preamplifier
The Laiv Harmony HP2A is a premium headphone amplifier and preamplifier designed to deliver uncompromising performance in both headphone and stereo systems. Built with a fully balanced Class A architecture, discrete high-power output stage, and precision-matched resistor ladder volume control, the HP2A is an ideal centerpiece for any high-end audio setup.
Precision Volume Control
The HP2A employs a discrete resistor ladder attenuator using tightly matched resistors for each step of volume control. This approach ensures low noise, perfect channel balance, and minimal signal degradation. Unlike conventional potentiometers, it provides absolute consistency across the entire volume range, which is essential for both headphone and loudspeaker listening.
Fully Balanced Class A Preamplifier
With a true balanced Class A preamplifier topology, the HP2A minimizes noise, crosstalk, and distortion. By maintaining separate positive and negative signal paths per channel and operating in Class A, the circuit delivers ultra-linear, transparent, and dynamically rich sound. This makes the HP2A not only an exceptional headphone amp but also a reference-grade preamp for stereo systems.
Discrete Headphone Amplifier with EXICON MOSFETs
The headphone amplifier section uses 4x EXICON MOSFETs per channel in a discrete Class AB configuration. This output stage provides high current drive, low distortion, and excellent thermal stability. The result is powerful, clean sound reproduction with effortless dynamics, capable of driving both low- and high-impedance headphones with authority.
EXICON MOSFET Technology
EXICON lateral MOSFETs are chosen for their high linearity, fast transient response, and natural harmonic characteristics. These transistors contribute to a smooth, resolving, and musical presentation, making the HP2A ideal for critical listening across all genres and headphone types.
Output Mode Selection
Users can easily toggle between three operating modes via front panel controls:
- Headphone amplifier only
- Preamplifier only
- Headphone amplifier and preamplifier simultaneously
This allows seamless integration into various use cases, from personal headphone setups to dedicated hi-fi systems.
Headphone Output Versatility
The HP2A offers multiple headphone outputs to suit a wide variety of headphone connectors:
- Balanced XLR4
- Balanced 4.4mm Pentaconn
- Unbalanced 6.35mm (1/4")
This flexibility makes it compatible with most high-end headphones on the market, including planar magnetic and dynamic driver models.
Dual OLED Displays and Intuitive Interface
The front panel features two OLED screens that clearly display input selection, volume level, and output mode. The interface is designed for ease of use while maintaining a clean and refined aesthetic. A single rotary encoder handles volume and navigation, combining functionality with tactile precision.
Ergonomics and Safety Features
- Anti-slip spike pads integrated into the top plate for safe stacking
- Configurable volume limit for startup protection
- Intelligent protection circuitry monitors DC offset, thermal conditions, and overloads
- Smooth encoder-based control with stepped feedback
These design choices reflect Laiv’s focus on user safety and everyday practicality in high-end environments.
Modular Input Expansion via Harmony LExt
The HP2A supports modular expansion through Laiv’s LExt input modules. Connected via LE-LINK, these optional modules allow users to adapt the HP2A to more complex systems:
- LExt PHONO: adds a high-quality phono stage
- LExt IN2: adds one balanced XLR and one unbalanced RCA input
This modular system ensures flexibility and future-proof system scalability.
System Integration via 12V Trigger
With 12V trigger input and output, the HP2A can be synchronized with other components such as the Laiv Harmony DAC or third-party amplifiers. This enables coordinated power-on/off behavior, simplifying system control in complex setups.
Unified Remote Control with Harmony DAC
The HP2A shares its remote control protocol with the Laiv Harmony DAC, allowing users to control both devices with a single remote. This unified control scheme enhances usability and system coherence.
Design and Build Quality
Crafted with an ebony black anodized aluminum chassis and accented with subtle gold highlights, the HP2A embodies a minimalist yet luxurious aesthetic. Its construction reflects both visual refinement and structural robustness, suitable for integration in premium audio environments.
Key Features
- True balanced Class A discrete preamplifier
- Precision discrete resistor ladder volume control
- Discrete headphone amplifier with EXICON MOSFETs
- Selectable output modes: preamp, headphone amp, or both
- Multiple balanced and unbalanced headphone outputs
- Dual OLED displays for intuitive user interface
- Modular expansion via Harmony LExt input modules
- 12V trigger input/output for system integration
