Audiophilepure

https://www.hifichoice.com/content/longdog-audio-p6100m

This is helped along somewhat by the naturally gutsy, barrel-chested sound, but it’s not thuggish or brutish in any way. There is enough slam to really tickle the big 12in bass drivers of my loudspeakers. This power is swiftly deployed; the opening drums on Roxy Music’s More Than This for example, are wonderfully powerful and dramatic when the wick is turned up. Yet still there’s no obvious sense of strain, despite the amplifiers not having a ‘muscle amp’ look about them.

Extended listening ends up with me thoroughly enjoying these Longdog Audio monoblocks. They’re really good at pretty much everything; for example, soundstaging is excellent, with a really ‘out of the box’ presentation that is never less than expansive and three dimensional. Ultimately, perhaps, they don’t have the true grit and insight of some really high-end designs – yet they deliver massive amounts of sound per pound.

https://www.enjoythemusic.com/superioraudio/equipment/1023/Margules_Audio_U280SC_30th_Anniversary_Limited_Edition_Vacuum_Tube_Amplifier_Review.htm

I learned that even in ultra-linear mode, this amplifier could easily drive the Scansonic speakers to a volume that I considered “realistic.” Not only was the volume more than satisfactory but so was their sound, due to the sound quality prowess of the Margules U-280SC 30th Anniversary tube amplifier. Even though the Scansonic MB5 B speakers cost less than half the price of the speakers that were used for the majority of the audition period, their midrange transparency made it so I felt as if I could hear not only details from the musical signal being sent to the speakers but the details from the musical signal that was sent to the Margules amplifier.

The above description might seem a bit obtuse. Yet, it was the relative amount of transparency of these speakers that led to a feeling that I could imagine hearing through to the Margules amp, and therefore could sense that I could clearly hear the intentions of the musicians, engineers, and producers that were responsible for the recording I was listening to at the time. The Margules amp’s level of transparency was often frighteningly lifelike sounding on some recordings.