The design of Gungnir is inspired by Gungnir, the eternal spear of Odin from Norse mythology, symbolizing precision and unmatched power—qualities that mirror its extraordinary sonic performance. True to Lotoo’s long-standing philosophy of “Sound First,” Gungnir embodies the essence of a full-sized high-end audio system, refined and condensed into a desktop form factor ideal for compact urban living spaces such as those in Hong Kong. Whether driving high-impedance headphones, connecting to reference-grade loudspeakers, or streaming high-resolution audio via Lotoo’s proprietary LTTP (Lotoo Tele-Transport Protocol) wireless transmission, Gungnir effortlessly serves as the command center of any desktop audio setup.
Key Features
Developed with a professional-grade large-system audio architecture, Gungnir delivers flagship-level performance within a compact chassis. It integrates a high-performance DAC, linear line output, and powerful headphone amplifier into one refined body. The amplifier section adopts a fully balanced Class A topology, ensuring minimal distortion, warm tonality, and excellent linearity for a smooth, detailed sound signature.
Connectivity options are highly versatile—supporting everything from large home audio systems to portable digital sources. With Lotoo’s proprietary LTTP lossless wireless technology, users can enjoy the convenience of wireless playback without sacrificing sound quality, achieving high-resolution, lossless audio transmission. Its discrete circuit architecture ensures superior channel separation, clean signal pathways, powerful output, wide dynamics, ultra-low distortion, and an exceptionally low noise floor, guaranteeing sound precision and integrity.
Core Architecture
Gungnir is equipped with dual AK4499EX DACs and dual AK4191EQ processors, operating in full performance mode to fully unleash the potential of the 4499 architecture. Built upon the design of a large-scale high-end system, it features completely independent left/right channel circuitry, each powered by its own dedicated analog supply and discrete modular design. Physical isolation is maintained among power, digital, and analog stages, achieving excellent channel separation, minimal interference, and uncompromised signal integrity. Even under high output loads, the unit maintains an exceptionally low noise floor for precise, distortion-free sound reproduction.
Design Philosophy
Gungnir embodies Lotoo’s vision of “bringing audiophile-grade performance to the desktop.” Its compact form makes it ideal for limited living spaces, while its powerful performance satisfies even the most demanding enthusiasts. With its rich connectivity and exceptional sonic capabilities, Gungnir can serve as the core of a desktop system, a wireless audio hub, or as part of a larger home audio setup. It delivers an effortlessly natural and layered sound, drawing listeners into hours of immersive musical enjoyment.
General Specifications
Display: 2.0" TFT LCD
Processor: ADI Blackfin BF706 DSP
DAC Chips: 2 × AK4191EQ + 2 × AK4499EX
SRC Chip: AK4137EQ
Amplifier Chips: BUF634A × 12
Playback Sampling Rates: DSD512 / PCM 768kHz
Wireless Audio: Lotoo LTTP (Lotoo Tele-Transport Protocol)
Line Output: XLR (Balanced) / RCA (Unbalanced)
Digital Output: XLR (AES/EBU), Coaxial (SPDIF), Optical (SPDIF)
Digital Input: XLR (AES/EBU), Coaxial (SPDIF), Optical (SPDIF)
Headphone Outputs: 3.5mm / 6.35mm (Unbalanced), 4.4mm / 4-pin XLR (Balanced)
USB Interface: USB Type-C
Power Supply: USB Type-C PD3.0 20V / 3A
Dimensions: 183 × 175 × 63 mm (excluding protrusions)
Weight: 1,800 g
Firmware Upgrade: Supported
Audio Specifications (Balanced Headphone Output 4.4mm)
Frequency Response: +0.03 / −0.07 dB (20–20kHz)
THD+N: 0.00025% @1kHz (20–20kHz, A-weighted, no load)
S/N Ratio: 132dB (20–20kHz, A-weighted)
Max Output Level: +27.0dBu (High Gain) / +4.0dBu (Low Gain)
Max Output Power: 8100mW/ch (32Ω), 3100mW/ch (100Ω), 1000mW/ch (300Ω), 520mW/ch (600Ω)
Channel Separation: 131dB
Dynamic Range: 132dB @1kHz (20–20kHz, A-weighted)
Noise Floor: 1.2uV
Audio Specifications (Single-Ended Headphone Output 3.5mm)
Frequency Response: +0.03 / −0.01 dB (20–20kHz)
THD+N: 0.00037% @1kHz (20–20kHz, A-weighted, no load)
S/N Ratio: 130dB (20–20kHz, A-weighted)
Max Output Level: +21.0dBu (High Gain) / −2.0dBu (Low Gain)
Max Output Power: 2200mW/ch (32Ω), 780mW/ch (100Ω), 260mW/ch (300Ω), 130mW/ch (600Ω)
Dynamic Range: 130dB @1kHz (20–20kHz, A-weighted)
Noise Floor: 1.4uV
Audio Specifications (XLR Balanced Line Output)
Frequency Response: +0.03 / −0.008 dB (20–20kHz)
THD+N: 0.00028% @1kHz (20–20kHz, A-weighted)
S/N Ratio: 132dB (20–20kHz, A-weighted)
Output Level: +24dBu
Channel Separation: 132dB
Dynamic Range: 132dB @1kHz (20–20kHz, A-weighted)
Audio Specifications (RCA Single-Ended Line Output)
Frequency Response: +0.025 / −0.003 dB (20–20kHz)
THD+N: 0.00051% @1kHz (20–20kHz, A-weighted)
S/N Ratio: 128dB (20–20kHz, A-weighted)
Output Level: +18dBu
Channel Separation: 128dB
Dynamic Range: 128dB @1kHz (20–20kHz, A-weighted)
