James’s Burson V4 Opamp with Onkyo A-9555

Published on

Carlos G
February 26, 2015

Post Info

Feedbacks - V4 SS Opamp
DEXA dual opamp, Onkyo A-9555, Takman resistors

I am using the new Burson dual op-amp in my modified. It replaces a DEXA dual op-amp which replaced an LM4562 which replaced the stock NE5532. The Burson Supreme op-amps offers better tonal balance and tonal detail, the DEXA being a little more open and extended in the bass. The Burson also seems more rhythmic. Both discrete opamps easily outclass monolithic opamps.

The Onkyo has numerous mods to it including rectifiers,. power supply caps, signal path caps and Takman resistors. Though the original is good, the amp is now in an entirely different class. In fact, I now prefer it to my vacuum tube separates.

James D.

The System

Listening with

Onkyo A-9555

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

LM4562 · Dual operational amplifier

Operating voltage: ±2.5 V to ±17 V
Supply voltage: 36 V (absolute maximum, V+ − V−)
Gain-bandwidth product: 55 MHz typ (45 MHz min)
Dual or single: dual
Package: SOIC-8; PDIP-8; TO-99
Quiescent current: 10 mA typ / 12 mA max

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NE5532 · Dual operational amplifier

Operating voltage: ±5 V to ±15 V (recommended)
Supply voltage: ±18 V (absolute maximum)
Unity-gain bandwidth: 12 MHz typ
Dual or single: dual
Package: SOIC-8; PDIP-8; SO-8
Supply current: 6 mA typ / 16 mA max

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DEXA

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.