Fosi Audio ZA3 upgrade with Burson Discrete V7 Vivid opamp

Fosi Audio ZA3 upgrade with Burson Discrete V7 Vivid opamp

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Post Info

The sound improvement over the stock op-amp is absolutely remarkable. The clarity, depth, and overall performance have been taken to a whole new level, making a noticeable difference in every listening session. I’m thoroughly impressed with the transformation, and it’s clear that Burson has set the bar for me. Without a doubt, Burson has become my go-to brand for high-quality audio components.

The System

Listening with

Fosi Audio ZA3 · Power amp: balanced Class-D stereo / mono power amp (TPA3255)
  • Frequency response: 20 Hz – 20 kHz (±0.1 dB)
  • Power: 8 Ω: not published · 4 Ω: 155 x2 stereo (48 V PSU); 95 x2 (32 V PSU); mono 235 (48 V) / 110 (32 V)
  • Inputs: RCA; XLR; 6.35 mm TRS; 12 V trigger
  • Input impedance: not published
  • Outputs: speaker terminals (2-8 Ω); subwoofer out
  • Other: SINAD 89 dB; SNR >=106 dB; THD <0.006%; 24-48 V DC in; five swappable DIP8 opamps; 1.78 kg

[1] [2]

Burson

Burson V7 Vivid Opamp

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. Fosi Audio ZA3: fosiaudio.com (fosi-audio-za3-balanced-dual-mode-class-d-amplifier page)
  2. Fosi Audio ZA3: fosiaudio.com (user-instruction-za3 page)