TRUE SOUND. BECAUSE THERE ARE GREATER HEIGHTS TO REACH.
Striving for the ultimate True Sound in headphone listening, Yamaha has crafted a headphone amplifier that achieves true audiophile performance. Our passion to constantly create and innovate has scaled sonic heights for over 30 years—fusing superior Hi-Fi audio technologies with sound field advancements from our AV receivers. Introducing our HA-L7A high-end headphone amplifier. Dive in, immerse yourself, and newly experience the full emotion and excitement in all your entertainment.
Yamaha Headphone Amplifier HA-L7A Overview
YAMAHA’S UNIQUE FLOATING AND BALANCED POWER AMPLIFIER TECHNOLOGY
Yamaha has optimized its patented Floating and Balanced Power Amplifier technology for this headphone amplifier. A total of four sets of power amplifier circuits on the plus and minus sides of the left and right channels of the output stage are floated from the ground, resulting in thoroughly symmetrical push-pull operation of the output stage. The headphones can be driven without altering the amplifier configuration between balanced and unbalanced, minimizing any sound quality discrepancies due to different output terminals. Moreover, all circuitry, including the power supply, is completely independent of the ground, and all effects of minute voltage fluctuations and external noise surrounding the ground are thoroughly eliminated. By maximizing these sound quality advantages, the amplifier achieves a natural and fatigue-free sound that lets you fully lose yourself in your entertainment, even when listening for a long time.
ELITE, ULTRA-HIGH PERFORMANCE 32-BIT D/A CONVERTER FROM ESS
Sparing no expense to realize superior sonic quality suitable for Yamaha's ideal high-end headphone amplifier, we have adopted ESS Technology's ES9038PRO converter, which is outstanding in the DAC industry for top-quality audio reproduction of minute signals. The dedicated master clock on the device utilizes a crystal oscillator with ultra-low phase noise to attain the highly precise D/A conversion, and features an eight-channel D/A converter housed inside the chip that applies four-channel conversion to the left and right sides respectively. Utilizing this four-channel bundle delivers exceptionally high-quality audio output with broad dynamic range and superior signal-to-noise ratio. This unlocks a greater sense of enjoyment in headphone listening, where you can intimately experience even background noises of the concert hall and the most minute details in the sounds of the instruments.
DISCRETE CONSTRUCTION AND BALANCED TRANSMISSION
All major stages after the DAC are unified with balanced circuitry and discrete configuration, achieving fully balanced transmission from the D/A converter output to the headphone jack. Moreover, balanced conversion is performed internally for ordinary single-ended (unbalanced) inputs, delivering the unique advantages of balanced transmission and amplification, such as minimizing external noise and sound quality deterioration, and applying them to a wide range of input sources. Additionally, when combined with headphones that support balanced drive, the common impedance of the transmission system is suppressed, further enhancing the signal separation that is crucial for quality headphone listening.
LOW-FREQUENCY REPRODUCTION AND REMARKABLE SPACIOUSNESS FROM DUAL TOROIDAL TRANSFORMERS
The power supply section employs independent transformers for the minute-signal circuitry in the front stage and the amplifier section in the second stage, and implements a separate power supply design that minimizes noise due to mutual signal interference. Moreover, usage of toroidal transformers significantly reduces magnetic flux leakage. Also, employing bifilar winding minimizes voltage variations, which in turn enhances the stability of the power supply, and achieves overwhelming spaciousness with powerful low-frequency reproduction.
HIGH RIGIDITY CONSTRUCTION - ELIMINATING SONIC IMPACTS FROM VIBRATION
In order to eliminate any detrimental impact of external and internal vibrations on the audio signals, we’ve given the unit a rugged construction that combines an original design concept with parts of high rigidity. An extruded aluminum panel of 8 mm thickness forms the L-shaped top surface, while the naturally vibrating toroidal transformer is mounted firmly onto a 2-mm-thick steel plate. Even stronger support is provided by a thick front panel, a double rear panel, and a unique housing design that features a bottom cover at the end. Through this heavy-duty housing, unnecessary vibrations are suppressed, enabling powerful yet supple low-frequency reproduction, and allowing you to completely feel the powerful energy and genuine realism contained in the music.
SOLID METAL FEET FOR STABILITY
The distinctive L-shaped HA-L7A is supported by five conical steel feet at each corner of the chassis, with dampers cushioned between each foot and the bottom panel that effectively suppress any vibration, allowing firm and stable support even on a desk or tabletop. Together with the weighty 5.3 kg body, all elements work together to effectively eliminate unwanted vibrations to achieve focused and realistic sound reproduction.
LOW-NOISE CIRCUIT DESIGN & HIGH-QUALITY PARTS
The HA-L7A adopts a low-noise design that isolates the three circuit boards: the main board that handles minute signals, the amplifier board and the amplifier, and the power supply board for the system. In addition, the main board is designed to eliminate any undesirable cross effects between the digital and analog signals through utilizing a multilayer board and thoroughly eradicating ground loops. Moreover, the MUSES72323, famed for its exceptionally low distortion and low-noise output, is used for the volume IC, while the power supply IC made by Analog Devices boasts low output noise with high ripple rejection. The converter section features the ES9842QPRO, made by ESS Technology. By using only the highest quality parts meticulously selected through repeated listening tests, we have achieved the most natural sound field reproduction possible.
THREE FRONT-PANEL HEADPHONE JACKS
The front panel of the HA-L7A features two balanced headphone jacks that allow you to fully enjoy the detailed, as-is high-quality of balanced circuitry, and one unbalanced headphone jack that reduces contact loss thanks to gold-plated processing. Famed NEUTRIK jacks are used for the XLR balanced headphone jacks, and Pentaconn terminals are used for the 4.4 mm 5-pole terminals, letting you connect your preferred set of headphones and unleash its full potential.
COMPREHENSIVE INPUT/OUTPUT TERMINALS FOR EXPANDABILITY
Featuring a comprehensive set of input terminals, including USB (type B), coaxial, and optical, the HA-L7A lets you connect a full variety of devices, such as high-resolution DAPs (digital audio players), PCs, and CD players. The amplifier also has built-in XLR and RCA pre-out/line-out output terminals, allowing it to serve as a D/A converter or preamplifier, providing exceptional connectivity and expandability options when using an external amplifier.
This function reduces noise by bypassing all circuitry that is not present in the original input source, such as DSP processing and analog-to-digital converters for analog audio. It ensures purity of the signal and enhances the sound, letting you fully enjoy the subtlest nuances in the music.
DSD (Direct Stream Digital) files of up to the top-level 11.2 MHz rate can be played natively with the ASIO driver, which accurately reproduces the original sound of DSD audio. Moreover, PCM high-resolution sound sources of up to 384 kHz and 32-bit are also supported. The driver is by Yamaha Steinberg, and transmission is not synchronized with the PC clock, but uses asynchronous transfer that controls transmission with the unit's high-precision clock. This reduces jitter to the utmost limit, for accurate reproduction of the most demanding high-resolution sound sources.
The USB DAC processing employs two dedicated clocks: a 44.1kHz system and a 48kHz system that uses a high-precision crystal oscillator with low phase noise. Moreover, the DAC section is designed to be less susceptible to external clock jitter through placement of the clock with the crystal oscillator as the master clock near the device.
Various built-in digital filters include Yamaha's original low-latency filter as well as those already pre-programmed to the DAC processor. There are a total of eight modes you can select to match your personal preference.
UNUSUAL DESIGN TO MATCH THE UNUSUALLY HIGH SOUND QUALITY
Following traditional audio principles and maintaining a low center of gravity, two transformers are mounted on the main frame and represented in the unique external design, invoking an impression of fine modern architecture. Furthermore, thanks to a vertical three-dimensional structure, the transformer is located immediately above the power supply board, minimizing the power supply path, contributing to a design that delivers both high sound quality and external elegance.
ELEGANT ROTARY DIAL
The robust weighty chassis is comprised of thick aluminum, and in addition to that exquisite main frame, aluminum is also used for the master volume and mode selector dials. Moreover, an abrasive sandblasting process has produced a high-grade textural feel, contributing to the elegance of high-end audio right down to the smallest detail—delivering a supremely tactile experience when using the HA-L7A.
OLED DISPLAY WITH BRILLIANT VIEWABILITY
The top panel of the unit features a gorgeous OLED display that provides a variety of important information, including the input source, its sampling frequency, volume, and the name of the SOUND FIELD mode used—all in an exceptionally easy-to-read manner. The display automatically turns off after being operated, eliminating any distraction or slight undesirable effects on the sound.
The Yamaha HA-L7A is a headphone amplifier that allows you to dive into your favorite content, by fusing superior Hi-Fi audio technologies with sound field advancements from AV receivers.
- Yamaha's unique Floating and Balanced Power Amplifier technology optimized for headphone listening
- Adopting ESS Technology's ES9038PRO to realize superior sonic quality
- 2 toroidal transformers for remarkable spacious sound
- SOUND FIELD mode for more immersive experience in any content
- Pure Direct mode to fully enjoy the subtest nuances in the music
- Elegant design yet high rigid construction
- 5 solid metal feet for exceptional stability and suppress any vibration
- OLED display with brilliant viewability
The colors and finishes shown may vary from those on the actual products.