iBasso DX340 MAX
The DX340MAX, as the ultimate evolution of the DX340, has been further enhanced from the original 128 discrete PWM-DACs to an impressive 160 PWM-DACs. The number of PWM-DACs is more than eight times that of other portable discrete DACs devices. This is not just an increase in quantity but also a more stringent requirement for clock precision and algorithm scheduling. Through a complete overhaul of the circuit design and wiring optimization, the entire device's AP measured THD+N as low as -122dB, which is comparable to desktop DACs using 1bit architecture priced at 13,000 USD. For discrete 1bit architecture, the mountain is high, but the summit has been reached.
FPGA-Master 3.0
In-house Developed Algorithms Accumulation
The DX340MAX is equipped with FPGA-Master 3.0 technology, which is built on years of in-house developed algorithms by iBasso. The new FPGA chip has 7.5 times the number of LUT logic units compared to version 2.0.
FPGA-Master 3.0 serves as the main audio controller, directly requesting audio data from the SoC. It is paired with two Accusilicon femtosecond oscillators with the phase noise as low as -158 dBc/Hz@1kHz, achieving fully synchronized single-clock operation. This creates picosecond-level precise control for the PWM-DACs, minimizes jitter as much as possible, and builds a pure digital audio system, ensuring every note is accurate, clear, and detailed.
Leveraging the powerful performance of the new FPGA the DX340MAX incorporates numerous new algorithms for even and odd harmonic adjustment, resulting in rich overtones and more distinctive sound characteristics. Increasing even harmonics makes the sound closer to that of a tube amplifier, while increasing odd harmonics adds more passion and vitality.
SoC + Audio DSP + FPGA-Master 3.0
More chips. More focused
Some players, to simplify and lower cost, implement audio DSP functions by simulating DSP algorithms within the SoC using software decoding. Because the system SoC needs to run a complex operating system, its real-time performance and system-level jitter are severely compromised. Using the SoC for "software decoding" of DSP algorithms results in unavoidable deterioration of audio quality.
To thoroughly resolve this issue, the DX340MAX is equipped with a dedicated professional-grade audio DSP chip. Thanks to this DSP's exceptional 192dB dynamic range and -174dB THD+N, it can achieve perfect audio conversion, while significantly reducing the load on the SoC.
Meanwhile, FPGA-Master 3.0 serves as the main audio controller, independently managing all audio processing permissions. From a physical architecture perspective, it effectively solves the problem of sound pollution caused by the SoC handling complex operating systems.
Four Batteries, Two Battery Management Systems
Separated Digital/ Analog Power Supply Creates an Extra Measure of Musical Qaulity
The DX340MAX uses four custom low-impedance lithium polymer batteries that support fast charging and discharging, with a lifespan and stability superior to ordinary lithium polymer batteries. It features two built-in battery management circuits, with the digital and analog sections independently powered by two separate battery packs. This ensures a stable power supply for the headphone amplifier and effectively isolates electromagnetic interference from the digital section, thus significantly reducing sound quality deterioration caused by inadequate power.
The analog section is powered by two batteries connected in series, forming an 8.4V high-voltage battery pack. Compared to traditional single 4.35V batteries, this configuration provides a more stable continuous output voltage, stronger transient output capability, lower internal resistance, and less loss. Power supply capacity directly determines the upper limit of sound quality. The gap between single-battery and dual-battery power supplies cannot be bridged by circuitry or operational amplifiers. Abundant power is essential for delivering greater drive and outstanding dynamic performance.
DC12V External Power Supply
Patented Technology, Experience Powerful Dynamics
The DX340MAX adopts the DC 12V external power supply technology, which has been awarded a national invention patent*. When connected to a 12V power source, it automatically bypasses the battery power, with the headphone amplifier powered directly by the 12V supply. The operating voltage of the headphone amplifier instantly rises to ±12V. At this point, the DC super-gain mode can be enabled, delivering a drive power of up to 2250mW + 2250mW @ 32Ω.
Compared to the DX320MAX, which only supports battery pack power mode, the DX340MAX offers both battery pack and external power supply options, providing more possibilities and significantly stronger drive capability.
Ultimate Cascaded Current Feedback Circuit
Driving With Precision & Mastery
A key upgrade in the DX340MAX over the AMP18 is the addition of a dedicated differential buffer amplification stage, which is composed of two operational amplifiers with a CMRR (Common Mode Rejection Ratio) of up to 120dB, that achieving full differential transmission. This design effectively reduces noise interference caused by differing reference grounds and isolates the impact of the rear-stage power output on the front stage.
The headphone amplifier adopts a 4-channel fully differential architecture with a cascaded current feedback design, improving latency issues associated with deep negative feedback circuits. A total of 80 transistors are used in a two-stage amplification structure to ensure linearity during signal amplification. Coupled with a complementary output circuit, it effectively reduces signal clipping distortion.
With numerous advanced technologies, the DX340MAX features a balanced output impedance of only 0.9Ω and a single-ended output impedance of just 0.4Ω, allowing it to deliver both powerful dynamics and delicate details simultaneously.
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Tuning With Numerous Classic Capacitors
Luxurious Materials That Break Through Sound Limitations
The DX340MAX uses 48 nickel-chromium metal film resistors at key points in the headphone amplifier, which are paired with numerous electrolytic and film capacitors for tuning. Among them are also legendary discontinued capacitors such as RIFA and SPRAGUE. The refinement and texture brought by high-quality boutique capacitors are a crucial source of the elevated sense of sound quality. These components occupy a large amount of space on the amplifier board, something only the MAX version can support. The use of cost-no-object, luxurious materials delivers a truly astonishing sound performance.
Analog + Digital Volume Controls
Custom 24-position Stepped Attenuator
The DX340MAX features independent analog and digital volume controls, allowing for more precise adjustment. The analog volume control uses a stepped potentiometer typically found only in Hi-end equipment. Our stepped potentiometer is crafted with 96 high-precision resistors and a meticulous mechanical design, supporting 24 steps of volume while being only one-tenth the size of traditional stepped potentiometers, while maintaining channel difference below ±0.1dB, which is a significant engineering challenge.
High digital volume does not affect bit depth, and low analog volume can be synchronized to attenuate background noise. For the best listening experience, it is recommended to keep the digital volume between 90 and 100, then adjust the analog volume accordingly. Under high digital volume and low analog volume, the DX340MAX fully showcases its capabilities.
Non-SRC Android 13 + Linux-based Pure Sound OS
Open System + Closed System, All-in-One
Using the Android 13 system and supporting installation of streaming APPs, you can enjoy the convenience of the Android system. The DX340MAX bypasses Android SRC system-wide at the software level, allowing both Mango Player APP and streaming APPs to enjoy system-level “Non-SRC” features.
Additionally, the DX340MAX features our in-house developed dedicated pure sound system, Mango OS, built on a Linux platform, specifically developed for music playback. Mango OS has accumulated extensive optimizations in music decoding and underlying algorithms, reducing CPU load and focusing solely on audio playback. This pure sound system has no WiFi or Bluetooth interference, offers low EMI, and provides a purer listening experience.
The All-new Evolved Form of The MAX
Aerospace-grade Titanium Alloy Shell With A Maximum Premium Feel
The DX340MAX reimagines the form of a super flagship player, evolving once again beyond the classics. It features a body crafted from aerospace-grade titanium alloy, infusing the device with a new aesthetic of structural elegance for HiFi equipment. The front boasts a 6.0inch AMOLED screen, while the back is accessible after removing two screws. The side design includes dual volume knobs, balancing visual appeal with operational convenience. Elegant, restrained, and precise—every detail of its structure is an external expression of the philosophy of sound.
