Xduoo A35 Hi-Fi Power Amplifier

Tube architecture and power for passive speakers

xDuoo A35 is an integrated tube amplifier designed to power passive speakers, combining the classic character of tubes with sufficient power for common home Hi-Fi sets. Thanks to the push-pull design with four EL34 tubes, it offers a power of up to 2×45 W at 8 Ω, so it can confidently drive a wide range of speakers. The entire solution is built to combine the musical expression of a tube amplifier with good control, stability and sufficient dynamic reserve.

Three-level amplification and balanced sound

The amplifier section uses a full three-level tube architecture, which gradually processes the signal from the input to the power stage. The 12AX7 tube is used for voltage amplification, the pair of 12AU7 stabilizes the current and prepares the signal for the final output section with four EL34 tubes. Ultra-linear mode operation helps to combine power, linearity and control over the signal, so the A35 offers a full, refined and natural expression with good readability of details, stable presentation even at higher volumes and a pleasantly arranged scene.

DAC, Bluetooth and practical connectivity

xDuoo A35 is ready to function as the main center of a home audio system. The built-in DAC with the ESS ES9018K2M chip ensures digital signal conversion and expands the possibilities of use without the need for an external converter. There is Bluetooth 5.1 with support for SBC, AAC, aptX and aptX HD codecs for convenient wireless listening, as well as three RCA inputs for connecting classic analog sources. Speaker outputs for 4 Ω and 8 Ω make it easy to match with various speakers, while the remote control and front panel with a volume indicator make everyday operation more pleasant.

Design, power supply and operational reliability

Emphasis was also placed on the mechanical and electrical processing itself. Point-to-point wiring helps reduce internal interference and maintain signal purity throughout the amplifier path. A stabilized power supply with EI transformer and filter circuitry contributes to lower noise and quieter operation, while a solid chassis reduces vibrations that could negatively affect the tubes. Gold-plated connectors promote long-term reliable contact, and protection and power-on delay circuits help protect the amplifier itself and the connected system.

Specifications

• Product type: tube amplifier with DAC
• Electronics: 1× 12AX7
• 2× 12AU7
• 4× EL34
• Inputs: 3× RCA
• Bluetooth 5.1
• Outputs: speaker terminals
• Frequency range: 20 Hz – 60 kHz (±1 dB)
• Power: 45 W per channel
• Signal/noise ratio: ≥ 93 dB
• THD+N: ≤ 1%
• Input impedance: 100 kΩ
• Output impedance: 4–8 Ω
• Bluetooth codecs: SBC / AAC / aptX / aptX HD
• Power supply: 220–240 V / 232 W
• Dimensions: 380 × 340 × 200 mm
• Weight: 20 kg
• Package contents: 1× xDuoo A35
• 1× power cable
• 1× remote control