Topping DX5 II DAC 2xES9039Q2M Headphone Amplifier X-Hybrid Bluetooth

Topping DX5 II DAC 2xES9039Q2M Headphone Amplifier X-Hybrid Bluetooth

The Topping DX5 II is the successor to the renowned DX5, a compact yet powerful DAC and headphone amplifier. Digital-to-analog conversion is handled by two ES9039Q2M chips in a symmetrical architecture, supporting PCM up to 32bit/768kHz and DSD512, with ultra-low distortion (0.00006%) and a SNR/dynamic range of 133dB. The X-Hybrid amplification stage evolves the original NFCA design, offering four channels at 2x7600mW into 16Ω with low power consumption and heat.

The DX5 II features balanced 4.4mm and 4-pin XLR headphone outputs, plus an unbalanced 6.35mm output, capable of driving demanding headphones with minimal noise (1.8µV). Connectivity includes USB via XMOS XU316 and Bluetooth 5.1 with LDAC, aptX Adaptive, aptX, aptX HD, AAC, and SBC (PCM up to 24bit/96kHz).

The device also integrates the new customizable Aurora UI, a 10-band equalizer with saveable profiles, and a Preamp mode for direct connection to amplifiers or active speakers. Additional features include automatic volume memory and 12V trigger input/output for synchronized operation with other HiFi equipment.

Specifications:

Inputs

• 1x Coaxial
• 1x USB-B
• 1x Optical Toslink
• Bluetooth

Outputs

• 1x Balanced stereo XLR
• 1x Unbalanced stereo RCA
• 1x Balanced headphone output, 4.4 mm jack
• 1x Unbalanced headphone output, 6.35 mm jack
• 1x Balanced headphone output, 4-pin XLR

DAC Chips

• 2x ES9039Q2M

Supported Sampling Rates

• PCM up to 32-bit / 768 kHz
• DSD up to DSD512

Headphone Amplification Circuit

• X-Hybrid

Bluetooth Chip

• QCC5125

Supported Bluetooth Codecs

• LDAC, aptX Adaptive, aptX, aptX HD, AAC, SBC

USB Interface

• XMOS XU316

DAC Specifications (Line Out / USB Input @ 96 kHz)

THD+N @ 1 kHz (A-weighted)

• RCA: < 0.00008%
• XLR: < 0.00006%

THD @ 20 Hz – 20 kHz (90 kBw)

• RCA: < 0.0005%
• XLR: < 0.00015%

Signal-to-Noise Ratio (SNR) @ 1 kHz (A-weighted)

• RCA: 128 dB
• XLR: 132 dB

Dynamic Range @ 1 kHz (A-weighted)

• RCA: 128 dB
• XLR: 132 dB

Frequency Response

• RCA: 20 Hz – 20 kHz (±0.3 dB) / 20 Hz – 40 kHz (±1.0 dB)
• XLR: 20 Hz – 20 kHz (±0.3 dB) / 20 Hz – 40 kHz (±1.0 dB)

Output Level

• RCA: 2.5 Vrms @ 0 dBFS
• XLR: 5.0 Vrms @ 0 dBFS

Noise (A-weighted)

• RCA: < 1.1 µVrms
• XLR: < 1.3 µVrms

Crosstalk

• RCA: -135 dB @ 1 kHz
• XLR: -147 dB @ 1 kHz

Channel Balance

• RCA: 0.3 dB
• XLR: 0.3 dB

Output Impedance

• RCA: 50 Ω
• XLR: 100 Ω

Headphone Amplifier Specifications (USB Input @ 96 kHz)

THD+N @ 1 kHz (A-weighted)

• 6.35 mm jack: < 0.00008% @ 200 mW, 32 Ω / < 0.00007% @ 22 mW, 300 Ω
• 4.4 mm jack / 4-pin XLR: < 0.00008% @ 850 mW, 32 Ω / < 0.00007% @ 90 mW, 300 Ω

THD @ 20 Hz – 20 kHz (45 kBw)

• 6.35 mm jack: < 0.0006% @ 200 mW, 32 Ω / < 0.0005% @ 22 mW, 300 Ω
• 4.4 mm jack / 4-pin XLR: < 0.0005% @ 850 mW, 32 Ω / < 0.0005% @ 90 mW, 300 Ω

SNR @ Max Out

• 6.35 mm jack: 131 dB @ 1 kHz
• 4.4 mm jack / 4-pin XLR: 133 dB @ 1 kHz

Dynamic Range

• 6.35 mm jack: 131 dB
• 4.4 mm jack / 4-pin XLR: 133 dB

Frequency Response

• 6.35 mm jack: 20 Hz – 20 kHz (±0.3 dB) / 20 Hz – 40 kHz (±1.0 dB)
• 4.4 mm jack / 4-pin XLR: 20 Hz – 20 kHz (±0.3 dB) / 20 Hz – 40 kHz (±1.0 dB)

Output Level

• 6.35 mm jack: 7.2 Vpp (low gain) / 24.2 Vpp (high gain)
• 4.4 mm jack / 4-pin XLR: 15.0 Vpp (low gain) / 48.0 Vpp (high gain)

Noise (A-weighted)

• 6.35 mm jack: < 1.1 µVrms (low gain) / < 2.5 µVrms (high gain)
• 4.4 mm jack / 4-pin XLR: < 1.6 µVrms (low gain) / < 4.3 µVrms (high gain)

Crosstalk

• 6.35 mm jack: -127 dB @ 1 kHz
• 4.4 mm jack / 4-pin XLR: -143 dB @ 1 kHz

Gain

• 6.35 mm jack: 8.6 dB (low) / 18.7 dB (high)
• 4.4 mm jack / 4-pin XLR: 14.6 dB (low) / 24.7 dB (high)

Channel Balance

• < 0.1 Ω

Output Power

• 6.35 mm jack:
  • 2×3300 mW @ 16 Ω
  • 2×2200 mW @ 32 Ω
  • 2×1160 mW @ 64 Ω
  • 2×250 mW @ 300 Ω
  • 2×120 mW @ 600 Ω
• 4.4 mm jack / 4-pin XLR:
  • 2×7600 mW @ 16 Ω
  • 2×6400 mW @ 32 Ω
  • 2×4300 mW @ 64 Ω
  • 2×990 mW @ 300 Ω
  • 2×490 mW @ 600 Ω

Supported Headphone Impedance

• 8 Ω

General

• Color: Black

Package Contents

• 1x Topping DX5 II
• 1x USB cable
• 1x 3.5 mm to 6.35 mm jack adapter
• 1x Bluetooth antenna
• 1x Power cable
• 1x Remote control