audio-sound @ hatena

An audio review & news blog. The volume should not exceed 80 dB is recommended. I usually adhere to the safe-listening style by WHO. Please note that my aural impressions and interpretations of measurements are also made from a safe-listening style.

(News) Lotoo Paw S2, an MQA compatible portable USB DAC/AMP to step up your high-resolution music

Lotoo Paw S2

Lotoo Paw S2


If you've been following the HiFi audio scene, you've probably never heard of Lotoo, one of the finest brands dedicated to producing the best sounding products. Lotoo is one of the finest brands dedicated to producing the best sounding products available, including the Lotoo Paw 6000, Paw Gold, and many other successful digital audio players. Last year, Lotoo launched its first USB Type-C portable DAC/AMP, the Paw S1, which became an instant hit with its flawless performance.


Today, Lotoo announced an upgrade to its highly successful Paw S1, the Lotoo Paw S2, which features Lotoo's full suite of advanced audio architecture with the legendary AKM4377 DAC chip at its core. The Paw S2 supports decoding of high-resolution PCM and DSD signals, as well as full 4x MQA signals. The Paw S2, like its predecessor, is equipped with a high-resolution digital audio player-grade audio chipset that delivers industry-leading performance in a compact form factor.


The Lotoo Paw S2 is available for $249. Enhance your portable music listening experience with the Lotoo Paw S2 now.


Lotoo Paw S2


Features of Lotoo Paw S2

  • High-performance AKM DAC chip installed
  • Independent amplifier chip for powerful output
  • Ultra-low noise floor
  • 3.5mm single-ended + 4.4mm balanced headphone output
  • Original Pentaconn 4.4mm socket
  • Media control keys
  • Built-in studio-quality EQ presets
  • MQA support
  • Two gain modes (High/Low)
  • CNC machined enclosure
  • OLED display
  • Multi-core OTG cable
  • Top-of-the-line audio performance in a compact size


Technical specifications of Lotoo Paw S2

  • Supports PCM decoding up to 32 bits/384 kHz
  • Supports DSD up to DSD128 native decoding
  • Supports 4x MQA decoding
  • THD+N: -109dB (0.0003%)
  • SNR: 123dB
  • Maximum output 150mW(4.4mm), 125mW(3.5mm)
  • Frequency Response Range: 20Hz to 20kHz
  • Line out level(3.5mm): 2.34Vrms
  • Line out level (4.4mm): 2.55Vrms
  • Noise level (3.5mm): -121dBu
  • Noise level(4.4mm): -119dBu
  • OS: LTOS


Lotoo Paw S2


Full-scale implementation of AKM's DAC chip

The Lotoo Paw S2 brings out the full performance of the legendary AKM4377 DAC chip. The PAW S2 provides a clean, high-resolution output signal with ultra-low distortion and a high signal-to-noise ratio to maximize the performance of the connected earphones/headphones, allowing you to listen to your favorite music in a dark, noise-free environment with vivid detail.


High-end DAP architecture

Lotoo designed the Paw S2 as if it were designing a high-end digital audio player system: the Paw S2 features a Blackfin DSP and an advanced 2x8 layer HDI PCB design. The analog board uses low-noise, low-temperature drift metal film resistors with millimeter precision.


Lotoo Paw S2


High-precision phase-locked loop

The Lotoo Paw S2 uses the AK8142, a programmable clock generator IC with an integrated fractional-N PLL. The company had previously implemented this clock in high-end digital audio players. This clock is a high-precision jitter clock that effectively reduces jitter in USB and SRC interfaces, ensuring high-end performance of this device.


Powerful output with a standalone headphone amplifier

The Lotoo Paw S2 features a stand-alone headphone amplifier that delivers a powerful output of up to 150mW @ 32Ω on the 4.4mm balanced headphone output jack.The Paw S2 provides a load of up to 125mW @ 32Ω on the 3.5mm single-ended headphone output jack. The Paw S2 has two gain levels, high gain and low gain. The Paw S2 has two gain levels, high gain and low gain, and the "fn" key on the side allows you to easily switch between the two gain modes.


Lotoo Paw S2


Media Control Key

Just below the "fn" key on the side, the Paw S2 has three media control keys: two keys are used for volume control and menu operations, while the middle key is used for playing/pausing music.


Built-in studio-quality PMEQ/ATE presets

Lotoo's PMEQ and ATE equalizer presets were among the best in the Paw S1, and the Lotoo Paw S2 adds more PMEQ and ATE presets. ACG-1 for PMEQ and Vinyl LP and Cassette presets for ATE.


Lotoo Paw S2


New OTG cable

Lotoo Paw S2 is pleased to announce the release of a new OTG cable in two different lengths (65mm and 800mm). This product is a high-purity cable made of pure OFC copper combined with copper shield net and aluminum foil. In addition, the black TPE shield makes the cable both flexible and strong.


Price and Availability

The Lotoo Paw S2 is priced at $249 for the Type-C cable model and $279 for the Lightning model. More details can be found here.


Purchase link