Rogue Audio Atlas Magnum III Power Amplifier

The Rogue amps perform really well from their 4 ohm taps into 8 ohm nominal speakers, so a 3 ohm dip shouldn’t be any problem when running from those taps. But the Stereo 100 should perform better overall, if you can go there.

100 Watts, even sacrificing a little of that for running 4 ohm taps into 8 ohms (this mismatch will generally sacrifice some power in exchange for lower distortion and better bass), should be enough for you 93dB speakers.

I like the A21 (owned one in the past) but I think the Rogue amps will be more enjoyable. They also bring a lot of flexibility for tube rolling, etc.

@couger4u 

I owned the Rogue Cronus Magnum II for several years (Atlas amp section).  Then I upgraded to a Rogue pre and Stereo 100 amp.  

The Stereo 100 felt and sounded like twice the amp of the Atlas regardless of wattage spec.  

Sounded on par with my Parasound a21+ but better overall refinement, transparency and sound stage.  The ST100 is a world beater for the money.  

Answer- the S

@avanti1960, + 1

I had an original Atlas and compared it to a Stereo 90 in my system, long ago. Yeah, the ST90 was definitely better (I later upgraded to Apollos). So I agree with @avanti1960 - you should probably just stretch to the Stereo 100. 

I was reading Stereophile review, and it says that Output power is 100Wpc in Ultralinear mode and about 60Wpc in Triode. Will my Focal 936 handle 60WPC?  Sorry am a newbie when it comes to amplifiers. Also, can the amp take KT150 tubes?