Firestone Cute Beyond headphone amp upgrade with Burson Discrete V4 opamp

Published on

wpadmin
June 22, 2011

Post Info

Feedbacks - V4 SS Opamp
Firestone Audio Cute Beyond

1 - Firestone-Audio - Spitfire DAC, Supplier PSU & HP Amp.

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A notable difference and improvement for these discrete opamps over other IC operational amplifiers tried in the Firestone Cute Beyond headphone amplifier, including the old time favorite OPA627. Busy going through my music collection of great diversity in genre and thus far it just seems to do everything right. It has brought to this little bedside rig of mine a certain synergy quite pleasing to the ear and silenced that littl

The System

Listening with

Firestone Cute Beyond

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.