ConclusionThe Soundastic Reference is primarily a fine integrated amplifier with an open and loose sound. We have no complaints about that at all. It drove both the Finals and the Focals with verve. You also have all the inputs you could ever want and something special in the hi-fi rack. That's worth something too!
However: for 6500 euros we expect a little more attention to finish and also an input that can be controlled with the remote. Just like standby. Our model also had a volume knob that had too much friction after the 12 o'clock position. That can happen. And of course it can be repaired, but it should not happen in the first place. And who is going to fix that in the Netherlands? It's a small detail. But we have to mention it.
At Alpha Audio we have recently started to take measurements of the test equipment. We are using a Prism dScope III. All measurements are done using 4 and 8 Ohm dummy loads and are calibrated on output voltage. This value is also shown in the screenshots. We loaded the amplifier on both channels.
Measurements Soundastic Reference
The measurements give us the impression that Soundastic uses little feedback. We see a hump of 50 Hz and across the spectrum 2nd and 3rd harmonics of it. A quieter spectrum can be obtained with feedback, but at the expense of fluidity and speed. Distortion is under control and does not increase when we load the amp more heavily. It is almost always around 0.04 / 0.05%. Those are good values for an amplifier with this setup. Our Bryston 4B SST3 reaches 0,005% at these powers, but it uses more feedback.
The power measurement shows that they were somewhat enthusiastic on the website. Or they use another distortion figure where they stop measuring. We see 122 watts into 8 Ohms at 0.035% and 246 watts into 4 Ohms. Linearity is nicely in order.