Rogue Audio Cronus Magnum 3 Dark

I'd also take a look at the PrimaLuna models. They appear to be a bit more flexible with inputs, tube choices, and ease of use. I wouldn't let the built in phono preamp in any integrated amp be a deciding factor.

https://www.musicdirect.com/specials/open-box-sale/primaluna-evo-200-tube-integrated-amplifier-with-mm-phonostage-black-open-box/

I have a CM III (non-Dark) that I think is a perfect match for my RTA 15TLs. I would have sent it off for the Dark upgrade by now, but just haven’t wanted to deal with the downtime. That is one of the main things that Rogue has going for it … most of their products seem to have a lifetime upgrade path. You can upgrade an original Cronus (pre-Magnum) all the way to the current Dark model.

When I was researching them 3 years ago, I really couldn’t find any negative reviews and after 3 years, I don’t have any complaints, either.

Looks like MusicDirect is just using stock photos of the Euro versions of PrimaLuna gear. They're the same photos as on the PrimaLuna US website. I'd recommend confirming voltage if buying.

Could not be any easier on the Cronus. I check mine with the changes in season. It is not usually off by much at all.

You could reach out to Nick Fitzsimmons there and see what he says about that or other questions you have: info@rogueaudio.com

I badgered him a few times before I bought mine and he was always helpful.

muncybob wrote: »

The EVO 100 integrated has something called Adaptive Autobias....never heard of such a thing, but do tubes need to be biased so often that it's a feature needed? The Cronus biasing seems very straight forward.

Some tube amps are autobias, some are manual. IIRC, autobias have a little less power output compared to the same w/manual bias.

The bias is for the power tubes. To answer your question.

1) depends on the quality of the power tubes. Poor quality tubes may drift more often than good tubes.

2) if you roll tubes or replace tubes, you should always check/set the bias.

3) In general no, biasing doesn't need to be done often unless the above 2 scenario's are in play.

Tubes have a "sweet spot" just like transistors. Bias keeps the grid current (DC) in the sweet spot. Too cold and the tubes can sound off, too hot the same and way too hot can ruin the tube.

It sounds more complicated than it is. It's mostly a set and forget (although) checking every once in a while is good practice, especially if you've invested all that money in power tubes.

autobias does the biasing automatically, but it will be to the manufacturer's settings.

This is a general overview of the terms.

I have both types. I don't have a preference.

H9