Srajan, I just caught up with my weekly 6moons fix to discover your preview on the new Moonriver integrated. I'd read a review on the John Marks site of the standard 404 just the week before. Nowhere in his did I find any reference to operational amplifiers in the output stage or in fact any reference to 47labs. I went back to check again and what he talks about are "power modules". I've now read up on all 404 reviews I could find and only very few dig into the op-amp angle. Kudos for reporting the facts without brushing over things with vague words like power modules. So thanks once again. Holger Scharmacher
It's not secret really (or wasn't to me) that Moonriver drives output opamps but neither is it outright advertised by name, probably because with some buyers, opamps have a bad or "cheap" rep versus discrete. As my preview states, I've owned the Patek gainclone and reviewed and enjoyed others. There's no reason to be biased against the concept if you don't need high power or low-Ω drive. Some Blue Circle amps in the past had what I believe were 200-watt op-amp outputs. I don't remember whether those were unusual high-power military parts or just many bridged/paralleled devices. All current others I'm aware of stick with the National Semi parts to produce about 50wpc into 4Ω and not stress these critters out. I've simply never heard one that went as gonzo on the power supply as these Swedish versions do, then packs in this many features. I can't wait to hear what theirs does. As the now expanded preview also says, numerous past Jeff Rowland amps used 6 x LM3886 per channel so the part has high-power implementation examples as well. It is a power module, just one based on an integrated circuit including comprehensive protection. Srajan
