Hello all,
Purchased a "like new" 5-months old
Conductor V2 myself recently and indeed there's that jumper inside the package. I was having a look on the mainboard and there's a connector that could accept that 3-pin jumper, but not sure what it is about. Hope you'll get the answer, just out of curiosity.
I find this headamp about perfect and I'll finish my personal review soon. Meanwhile, here're my thoughts and personal measurements:
Frequency response (20-200000 Hz): +0.09, -0.01 dB
THD: 0.007%
Noise (A-weighted): -100 dB
Dynamic range: 100 dB
IMD + noise (A-weighted): 0.006%
Crosstalk (left/right) @ 100 Hz: -85.3/-95.3 dB
Crosstalk (left/right) @ 1 KHz: -88.8/-88.1 dB
Crosstalk (left/right) @ 10 KHz: -69.0/-68.3 dB
Noise-floor is mostly kept below -130dB with few spikes getting to around -106dB
Linearity is virtually perfect (+/-0.1dB) up to 30.000 Hz
Latest RMAA PRO version
PRO:
- Huge output power, I was able to drive 8-Ohms speakers up to 9W/channel (
please don't try this at home!).
- Perfectly flat between 10 Hz and 30 KHz.
- Virtually perfect output representation of common sine-waves and square-waves (20 Hz, 1 KHz, 20 KHz).
- Very low THD + noise with great dynamic of > 100dB.
- For a pure Class-A operation I was expecting it to be way much hotter (it's about 30C on top).
- DC-coupled with dedicated protection.
- No opamps & no caps in signal path.
- Separate shielded AC/AC transformers, for digital and analogue parts.
- Huge 8200uF/35V ELNA caps to lower AC ripple & noise.
- Five power rails, each one being regulated by a full-wave 4-diodes bridge rectifier (a total of 20 fast powerful diodes).
NEUTRAL:
- 3 Ohms output impedance could get improved, although doesn't affects any of my cans, not even my 16-Ohms IEM's.
CON:
- No EMI/RFI filter inside (never happened to me, but some people might hear electrical buzz/noise); however, an external EMI/RFI and/or isolation transformer could get added later.
Bottom of line, this is a true
REFERENCE headphone amplifier that could represent an "end-game" for audiophiles and musicians.