XDUOO A35 EL34 Tube Integrated Amplifier with ES9018K2M DAC

XDUOO A35 EL34 Tube Integrated Amplifier

The XDUOO A35 is a hand-wired, all-tube integrated amplifier that combines classic EL34 push-pull power with a built-in ESS ES9018K2M DAC and Qualcomm Bluetooth 5.1. Delivering 45W per channel, the A35 works as both a stereo speaker amplifier and a modern desktop Hi-Fi centerpiece, pairing vintage tube warmth with convenient digital and wireless sources.

Three-Stage All-Tube Circuit

The A35 uses a classic three-stage tube topology: a 12AX7 dual triode handles voltage amplification with excellent linearity, two 12AU7 triodes form a low-noise, low-impedance driver stage, and four precisely matched EL34 tubes in a push-pull configuration deliver 45W per channel of grand dynamics and delicate musical detail. Every tube is strictly selected and precisely matched.

Point-to-Point Hand-Wired Construction

Core circuits are built with traditional point-to-point soldering, using direct component connections that eliminate extra lead interference. Short copper wiring keeps the layout neat with natural shielding and low crosstalk, preserving the pure, warm classic tube sound audiophiles seek.

Ultra-Linear Operation Mode

The amplifier runs in ultra-linear mode for balanced tonal response, wide frequency extension, and strong output control, maintaining a 20Hz–60kHz frequency range. Solid bass, a layered soundstage, and clear detail make it equally at home with orchestral, jazz, vocal, and electronic music.

ESS ES9018K2M DAC

A built-in ESS ES9018K2M high-performance DAC chip provides ultra-low distortion and high signal-to-noise performance, extending dynamic range for refined, layered digital playback directly through the amplifier—no external DAC required.

Qualcomm Bluetooth 5.1 with aptX HD

The A35 is equipped with a Qualcomm Bluetooth 5.1 chip supporting SBC, AAC, aptX, and aptX HD codecs, enabling stable, high-fidelity wireless audio from smartphones, tablets, and portable music players.

Custom EI Transformer

The power supply is built around a custom EI transformer wound with imported low-magnetostriction silicon steel cores and high-purity enameled copper wire, vacuum-impregnated at high temperature. This suppresses coil resonance and vibration, eliminates high-frequency noise, and provides a stable, ultra-low noise foundation.

Premium Components & Gold-Plated Connectors

Main filter capacitors are Japan-made TK audio-dedicated models tailored for tube amplifiers, delivering smooth, warm tone, full bass, and crisp treble. Gold-plated input and output connectors ensure reliable, anti-oxidation contact for lossless long-term signal transmission.

Relay Protection & Shock-Resistant Chassis

A high-strength metal casing with a dedicated tube shockproof structure blocks vibration and electromagnetic interference. Built-in relay protection introduces a 60-second startup delay so the tubes warm up gradually before playback, and automatically guards against overload and short-circuit conditions to protect connected speakers and internal components. The included infrared remote control allows convenient adjustment from across the room.

Specifications

• Tube Complement: 12AX7 × 1, 12AU7 × 2, EL34 × 4
• Output Power: 45W per channel (8Ω load)
• Frequency Response: 20Hz – 60kHz (+3dB)
• Signal-to-Noise Ratio: 93dB (A-Weighted)
• THD: ≤1%
• Channel Separation: >63dB
• Input Sensitivity: 300mV
• Input Impedance: 100kΩ
• Output Impedance: 4Ω / 8Ω
• Inputs: CD IN, AUX1 IN, AUX2 IN, Bluetooth
• DAC: ESS ES9018K2M
• Bluetooth: Qualcomm 5.1 | SBC, AAC, aptX, aptX HD
• Power Supply: AC 110V (100–120V) / 220V (220–240V)
• Power Consumption: 232W
• Dimensions (W × D × H): 38 × 34 × 20 cm
• Weight: 20 kg

What's Included

• XDUOO A35 integrated vacuum tube amplifier
• Pre-installed vacuum tubes
• Infrared remote control
• Power cable
• User documentation