Valab WM8741 DAC upgrade with Burson Discrete V4 opamp

Published on

Carlos G
October 14, 2014

Post Info

Feedbacks - V4 SS Opamp
Valab WM8741

The Burson Supreme Sound Op-amps arrived yesterday. I replaced the dual to mono OPA627 op-amps in my Valab WM8741 DAC with the Burson Supremes, and it was quite an improvement right out of the box. Compared to the OPA627 the Burson supremes has better overall performance. Tighter and more detailed bass, better high frequency detailing, and most off all a significant improvement in soundstaging. And that is before the “burn in” has started!

Karl

The System

Listening with

Valab WM8741

Burson

Burson V4 Opamp · Discrete opamp (single / dual) · discontinued

Supply voltage: ±5 V to ±20 V (absolute maximum)
Gain-bandwidth product: 50 MHz (at 100 kHz)
Dual or single: dual and single
Package: dual 40 mm × 16 mm × 20 mm; single 40 mm × 16 mm × 14 mm; 8-pin

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Also in the system

OPA627 · Operational amplifier

Supply voltage: ±4.5 V to ±18 V (recommended); ±18 V dual-supply absolute maximum
Gain-bandwidth product: 45 MHz typ (OPA627AU/BU, gain = 1, CL = 30 pF); 16 MHz typ (OPA627AM/BM/SM)
Dual or single: single
Package: SOIC-8; TO-99
Quiescent current: 7 mA typ / 7.5 mA max

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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.