For my receiver's power output rating, the absolute minimum transformer rating would be 600VA. Yamaha seems to have decided that .7 the total output power would be sufficient (like some transformer manufacturers suggest), and so it is 440VA. If the amp were designed to run at full power from all channels (at 6-ohms, the limit of the transistors I bet) at once, it would need a 3200VA transformer to handle it.
The main filter caps are 8200uf 71v caps, one for each supply rail. For full power (6-ohms), an ideal amount would be 40,000uf for each supply rail.
I guess since the receiver was only $240 new, they didn't have much room in the budget.
Yes it does, emphatically. There I am driving the Mani-2s with a single 80wpc amp and it positively obliterates the Arcam even though I was driving it biamped with 120w per drive unit! That said, considering the Naim is more expensive than the Arcam and only does 2-channel, it damn well should!
The odd thing is it actually sounds better than expected! maybe it's because I ahve a smaller room than the shop and so it doesn't need to drive the speakers so hard, or maybe I'm just lucky, but the thing sounds positively wonderful and certainly shows the Arcam where it's at. Now the Arcam's no slouch and would be many a man's perfect solution, but the Naim just drives music along with pathos and depth and transparency and...it's really re-ignited my interest in music which had been waning with the Arcam.
