V5 OPA resulted in somewhat higher gain. applied -6db to amp to achieve roughly the same volume settings as stock. Biggest improvement noticed is in bass performance, HE-400i headphones lost their weakness in that area with this upgrade. Also modified amp final heatsink by adding case heat transfer block (work in progress).
Eric W.
The System
Listening with
Gustard H10 · Headphone amp: Class-A discrete output stage headphone amp / preamp · discontinued
- Frequency response: 0 – 55 kHz (-0.5 dB)
- Output power (headphone): 16 Ω 1 W · 32 Ω 2 W · 50 Ω 2.7 W · 100 Ω 2.2 W · 600 Ω 0.57 W
- Output impedance: not published
- Gain: +8 dB nominal; adjustable -4 / +2 / +8 / +14 / +20 dB
- Inputs: 2x XLR (balanced); 2x RCA
- Input impedance: XLR 10k; RCA 68k
- Input sensitivity: +6 dBu
- Outputs: 1x 6.35 mm TRS headphone
- Other: THD+N <0.00035% (1 kHz, 1 W @ 100 Ω), <0.0007% (0.5 W @ 32 Ω); damping factor >400 @ 50 Ω; dynamic range >128 dB (A); two 25 W toroidal transformers; 3.3 kg
[1] [2]
Burson
Burson V5 Opamp · Discrete opamp (single / dual) · discontinued
- Supply voltage: ±3.5 V to ±15 V (absolute maximum)
- Gain-bandwidth product: 50 MHz (at 100 kHz)
- Dual or single: dual and single
- Package: 14.5 mm wide × 12.4 mm deep × 29 mm high (V5-OPA-D)
[3]
