This soundcard ( HT Omega Claro Halo Soundcard ) has four JRC4580 Opamps. The first two combines the polarity signals from the AK4396 DAC, then passes the combined signals to the other two opamps for amplification to the headphone and RCA outputs. Even though the manual says that you can change the first two opamps only, the effect is very minimal because the second pass to the latter two IC opamps somehow neutralizes the Burson discrete Opamps. You only get the full Burson Opamp effect when you change all four IC opamps to the Burson discrete Opamps!! Will [removed].
The System
Listening with
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
[1] [2]
Also in the system
JRC4580 / NJM4580 · Dual operational amplifier
- Operating voltage: ±2 V to ±18 V
- Supply voltage: ±18 V (absolute maximum)
- Gain-bandwidth product: 15 MHz typ (at 10 kHz)
- Dual or single: dual
- Package: MSOP8 (VSP8), DMP8, SOP8 JEDEC 150 mil, SSOP8, DIP8 (discontinued), SIP8 (discontinued)
- Supply current: 6 mA typ / 9 mA max
[3]
