Zhendong’s Burson Conductor 3X Reference with Sennheiser HD 6XX and HiFiMAN Arya

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Sales Burson
December 8, 2020

Post Info

Feedbacks - Conductor 3R | 3XR
Asus ROG G731, Burson Conductor 3X Reference, HiFiMAN Arya, Sennheiser HD 6XX, ZMF Eikon, ZMF Verite

Wonderful so far!

The System

Listening with

Sennheiser HD 6XX · Headphones: open-back, dynamic, circumaural

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 3X Reference at 0.58 W (XLR) / 0.3 W (SE) into 300 Ω, which is about 13.2 V / 9.5 V RMS (calc.), roughly 15 dB / 13 dB more than that. The Conductor 3X Reference’s 0.5 Ω headphone output impedance is 1/600 of the load. ^{[1] [2] [3] [4] [5]}

HiFiMAN Arya · Headphones: open-back, planar magnetic, circumaural · discontinued

Impedance: 35 Ω
Sensitivity: 90 dB (reference not stated by HiFiMAN)
Frequency response: 8 Hz – 65 kHz
Plugs / cables supplied: not published (HiFiMAN spec page lists no connector)
Other: weight 404 g

^[6]

ZMF Eikon · Headphones: closed-back, dynamic (biocellulose), circumaural

Impedance: 300 Ω
Sensitivity: ~98 dB/mW (approx., “~” as published)
Frequency response: not published
Plugs / cables supplied: not published (ZMF lists no connector type)
Other: 24 dB passive isolation (ZMF)

^{[7] [8]}

ZMF Verite Open · Headphones: open-back, dynamic (vapor-deposited beryllium), circumaural

Impedance: 300 Ω
Sensitivity: ~97 dB/mW (approx., “~” as published)
Frequency response: not published
Plugs / cables supplied: not published (ZMF lists no connector type)

^{[9] [10]}

Burson

Burson Conductor 3X Reference · DAC / headphone amplifier / preamp · discontinued

Output power (XLR / SE): 16 Ω 7.5 W / 3.75 W · 32 Ω 5 W / 2.5 W · 100 Ω 1.75 W / 0.88 W · 150 Ω 1.16 W / 0.58 W · 300 Ω 0.58 W / 0.3 W
Output impedance: 0.5 Ω (headphone); 1 Ω (pre out); 25 Ω (DAC out)
Output voltage: RCA 2 V (DAC out)
Gain: High / Low; dB not published
Inputs: 2x XLR; USB (XMOS; PCM to 768 kHz/32-bit, native DSD512); Toslink; coaxial; Bluetooth 5.0 aptX HD; microphone
Input impedance: 40 kΩ
Input sensitivity: line level
Outputs: XLR pre out; line-level DAC out; 6.35 mm + 4-pin XLR headphone
DAC / chipset: 2x ESS ES9038Q2M
Other: Model R180X (3XR); THD <0.0015%; FR ±1 dB 0-58 kHz

^{[3] [4] [5]}

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.