Warren’s Burson Conductor 3 Performance with Sennheiser HD 6XX

• Impedance: 300 Ω
• Sensitivity: 103 dB SPL @ 1 kHz, 1 V (as published) ≈ 97.8 dB/mW (calc.)
• Frequency response: 10 Hz – 41 kHz
• Plugs / cables supplied: 3.5 mm stereo jack plug (6.35 mm adapter); 1.8 m cable
• Other: THD <0.1% (1 kHz, 1 V)

Matching notes: At 300 Ω and 103 dB/V, the HD 6XX is a high-impedance load that needs voltage more than current: about 2.2 V (17 mW, 7.5 mA) for 110 dB SPL (calc.). Burson rates the Conductor 3 Performance at 0.16 W (SE) into 300 Ω, which is about 6.9 V RMS (calc.), roughly 10 dB more than that. The Conductor 3 Performance’s 0.6 Ω headphone output impedance is 1/500 of the load. ^{[1] [2] [3] [4]}

• Output power (headphone): 16 Ω 4 W · 32 Ω 2 W · 100 Ω 0.64 W · 150 Ω 0.42 W · 300 Ω 0.16 W
• Output impedance: 0.6 Ω (headphone); 1 Ω (pre out); 25 Ω (DAC out)
• Output voltage: RCA 2 V (DAC out)
• Gain: High / Low; dB not published
• Inputs: USB (XMOS; PCM to 768 kHz/32-bit, native DSD512); Toslink; Bluetooth 5.0 aptX HD; microphone
• Input impedance: 38 kΩ
• Outputs: RCA pre out; RCA DAC out; 6.35 mm headphone
• DAC / chipset: ESS ES9038Q2M (x1)
• Other: Model M180 (3P); SE only; THD <0.0017%; FR ±1 dB 0-58 kHz

^{[3] [4]}

Specs from manufacturer data unless a source below says otherwise. “calc.” values are worked out from those figures (V = √(P × R); 110 dB SPL used as a loud reference level). Gear listed without specs is not in our spec library yet.

1. Sennheiser HD 6XX: support.sennheiser-hearing.com
2. Sennheiser HD 6XX: us.sennheiser-hearing.com
3. Burson Conductor 3 Performance product page
4. Burson Conductor 3 Performance User Manual V1.6 (Burson downloads)