@Peakman @Graham @Xuanqian
I owned the Vega G2. I had long sessions listening to it with ATC SCM 40 Actives speakers.
Something was wrong and I really would like to share with you my experience and doubts regarding Vega G2 + ATC SCM40A combo.
More precisely, the concern is about Vega G2 output level (4.8Vrms at 0dBFS, output impedance 5ohm on Balanced XLR according to specs).
So we fed the Vega G2 with a MacBook running Audirvana connected to USB input, and played our test playlist. We also used an Arcam player and concluded to the same results.
On most test tracks, normal listening was between 55 and 70 volume. A lot of tracks even needed to go in the 70-80 region. For the same tracks at a live volume, we often exceeded 80. And on some rare tracks (with low level recordings), we reached the max 100 volume ! And sound was NOT LOUD. Our ears were FAR from bleeding !
Overall, even if sound was very good (in quality), it sounded like it was lacking power, dynamic, let’s say it lacked some juice.
As a reminder, ATC SCM40 active speakers pack 242 watt of Class A/B Tri-amplifier (150W LF, 60W MF, 32W HF).
Setting the volume so high for normal listening is quite unusual for a preamp. Is it normal ?
There was definitely a problem related to output level on Vega G2. Or may be passive preamp ? Or may be it’s related…
So we replaced the Vega G2 preamp section with ATC CA2 mkII analog preamp (2190 €).
The output level issue disappeared immediately.
Sound became full bodied, dynamic, juicy, much much louder (if we wanted to), but in a sense that we had the feeling we could turn up the volume to infinite without overload neither distorsion, without agressiveness, which had never been the case using the Vega G2 preamp.
The ATC SCM40A suddenly revealed themselves as they should sound.
So here I am @Xuanqian. What is the problem with Vega G2 output level ?