David’s Burson Super Charger 3A with ZMF VC, Focal Clear and ZMF Aeolus

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The System

Listening with

ZMF Verite Closed · Headphones: closed-back, dynamic (vapor-deposited beryllium), circumaural
  • Impedance: 300 Ω
  • Sensitivity: ~99 dB/mW (approx., “~” as published)
  • Frequency response: not published
  • Plugs / cables supplied: not published (ZMF lists no connector type)

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Focal Clear · Headphones: open-back, dynamic (40 mm Al/Mg M-dome), circumaural · discontinued
  • Impedance: 55 Ω
  • Sensitivity: 104 dB SPL / 1 mW @ 1 kHz ≈ 116.6 dB/V (calc.)
  • Frequency response: 5 Hz – 28 kHz
  • Plugs / cables supplied: 4-pin XLR; 6.35 mm; 3.5 mm cables supplied

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ZMF Aeolus · Headphones: open-back, dynamic (TPE), circumaural · discontinued
  • Impedance: 300 Ω
  • Sensitivity: ~97 dB/mW (approx., “~” as published)
  • Frequency response: not published
  • Plugs / cables supplied: not published (ZMF lists no connector type)
  • Other: weight 445 g

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Burson

Burson Super Charger 3A · Power supply (24 V DC)
  • Other: 24 V / 3 A; noise floor <1 µV; 2.5 mm barrel plug, centre positive; 100-240 V AC in

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Also in the system

Holo Audio Spring 3 · DAC: discrete R2R ladder DAC with native DSD (optional preamp module, Level 1/2/KTE editions)
  • Output impedance: 27 Ω (RCA); 54 Ω (XLR)
  • Output voltage: RCA 2.9 V (PCM) / 1.45 V (DSD128) · XLR 5.8 V (PCM) / 2.9 V (DSD128)
  • Inputs: USB (isolated; PCM to 1.536 MHz, DSD1024 native); I2S; coaxial; optical; AES
  • Outputs: RCA; XLR (preamp module optional: 5.8 / 11.6 V)
  • DAC / chipset: discrete R2R (no DAC chip)
  • Other: PCM 48 kHz NOS: THD+N 0.00032%, DNR 127 dB; 40 W

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RME ADI-2 DAC · DAC / headphone amp (FS version)
  • Frequency response: 0 Hz – 20.2 kHz (-0.1 dB @ 44.1 kHz) … 0 – 115 kHz (-1 dB @ 384 kHz)
  • Output power (headphone): 16 Ω 0.94 W · 32 Ω 1.2 W
  • Output impedance: XLR 200 Ω; RCA 100 Ω; phones 0.1 Ω
  • Output voltage: RCA 6 dB below XLR (-5 to +13 dBu; +13 dBu ≈ 3.5 V, calc) · XLR switchable +19/+13/+7/+1 dBu @ 0 dBFS (+19 dBu ≈ 6.9 V, calc)
  • Gain: phones High Power +22 dBu (10 V) into >=100 Ω / Low Power +7 dBu (1.73 V); IEM output -3 dBu (0.55 V)
  • Inputs: USB; SPDIF coax (RCA, AES-compatible); SPDIF optical (ADAT-compatible)
  • Outputs: XLR; RCA; 6.3 mm phones; 3.5 mm IEM
  • DAC / chipset: not published
  • Other: SNR XLR 120 dB unw / 123 dBA; THD <-120 dB; phones max 1.5 W/ch @ 0.001% THD; 32 Ω figure is 1.2 W @ +18 dBu, 16 Ω 0.94 W @ +14 dBu (test points, not max)

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