Jeffery’s Burson Conductor 3X Reference with Audeze LCD-X

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Sales Burson
January 29, 2024

Post Info

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Audeze LCD-X, Burson Conductor 3X Reference, FiiO M11, Fiio M11 Music Player

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The System

Listening with

Audeze LCD-X · Headphones: open-back, planar magnetic, circumaural

Impedance: 20 Ω
Sensitivity: 103 dB/1mW (at Drum Reference Point) ≈ 120.0 dB/V (calc.)
Frequency response: 10 Hz – 50 kHz
Plugs / cables supplied: braided 4-pin XLR combo cable with 6.35 mm single-ended adapter
Other: recommended power >250 mW (min >100 mW; max 5 W RMS); 106 mm driver; max SPL >130 dB

Matching notes: At 20 Ω and 103 dB/mW, the Audeze LCD-X is a low-impedance load, and an efficient one: about 0.32 V (5 mW, 16 mA) for 110 dB SPL (calc.). Burson does not publish a 20 Ω rating for the Conductor 3X Reference. Its 16 Ω and 32 Ω ratings (7.5 W XLR / 3.75 W SE; 5 W XLR / 2.5 W SE) fall either side of it. The Conductor 3X Reference’s 0.5 Ω headphone output impedance is 1/40 of the load. ^{[1] [2] [3] [4]}

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

^{[2] [3] [4]}

Also in the system

FiiO M11 · Digital audio player: portable music player / USB DAC · discontinued

Frequency response: 10 Hz – 90 kHz (-3 dB)
Output power (XLR / SE): 32 Ω 0.55 W / 0.195 W
Output impedance: <1 Ω (32 Ω loaded)
Output voltage: XLR 11.87 Vp-p peak (balanced)
Gain: not published
Inputs: USB-C (DAC, 384 kHz/32-bit); Bluetooth RX (SBC, LDAC)
Outputs: 3.5 mm SE; 2.5 mm balanced; coax out; USB audio out
DAC / chipset: 2x AKM AK4493
Other: SNR >=118 dB (A); THD+N <0.002%; noise floor PO <5 µV, BAL <7 µV; 3800 mAh

Matching notes: Burson lists the Conductor 3X Reference’s analogue inputs as line level (40 kΩ input impedance). The FiiO M11 is rated at 11.87 Vp-p peak (balanced) (XLR) output. ^{[5] [2] [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.