Vladimir’s Burson V5i Opamp with Sennheiser HD 650

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The sound quality has noticeably improved, with enhanced detail across the entire frequency range. Every note feels more defined, and the overall clarity has taken a significant step forward. The preamps, in particular, have left a strong impression with their ability to bring out subtle nuances in the audio. It’s clear that they contribute to a richer, more immersive listening experience.

The System

Listening with

Sennheiser HD 650 · 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: 6.35 mm stereo jack plug (3.5 mm adapter)
  • Other: THD <0.05% (1 kHz, 1 V); 42 mm transducer

[1] [2]

Burson

Burson V5i Opamp · Discrete opamp (single / dual) · current
  • Supply voltage: ±5 V / 10 VDC to ±16 V / 32 VDC (absolute maximum)
  • Gain-bandwidth product: 50 MHz (at 100 kHz)
  • Dual or single: dual and single
  • Package: 11 mm wide × 11 mm deep × 7.3 mm high

[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 650: us.sennheiser-hearing.com
  2. Sennheiser HD 650: support.sennheiser-hearing.com
  3. Burson V5i Opamp datasheet V1.0
  4. Burson V5i Opamp product page