Audiophilepure

https://www.stereophile.com/content/infigo-method-3-monoblock-power-amplifier

I’ve heard few amplifiers I’ve been as eager to return to time and time again as the Infigo Method 3 monoblocks. For smoothness, warmth, you-are-there beauty, color, and ease, they’ve taken me as close to my ideal sound as the best gear I’ve had in my system. Indeed, the Method 3 is one of the finest-sounding components I’ve been privileged to review. There may be amps with more powerful bass, but few so successfully combine modest energy consumption and unforced, utterly convincing musicality. Plus, they’re easy to move around.

https://www.hifichoice.com/content/nad-m33

Since seeing NAD’s M10 last year we were under the impression that it was all the system we could ever reasonably require, and so consequently it’s been one of our go-to recommendations on our Letters pages. However, the M33 seems to have raised the bar even further. In it’s full-size guise it offers the same style, flexibility and ease of use combined with a performance that’s just as arresting with analogue sources as it is when streaming. Throw in the futureproof peace of mind that comes with the upgrade slots, and it’s difficult to think of a safer pair of hands to underline the fact that what you’re investing your money in is something really rather special

https://www.hifichoice.com/content/copland-csa-100

The CSA 100 is a rare beast in hi-fi terms in that it manages to be almost absurdly competent, but never feels dull or soulless in doing so. There’s nothing within the extensive specification that feels anything other than exactingly thought out, but beyond that it rarely fails to delight across its many inputs and a very broad spectrum of music. Throw in the superb build and rather lovely appearance, and you have an absolutely outstanding amplifier that’s likely to delight anyone who spends any time with it.

https://www.audiophilia.com/reviews/2023/4/3/kb8llwi7wcd825zi32ii2lybjshajl

Van Alstine’s vision for a better, more powerful monoblock amp has come to life with the DVA M750 Monoblock. I know of no other monoblock amp on the market, at a price of only $5598/pair that can perform like this, with such power, and finesse, and endowed with such a  large quiet soundstage presented with exceptional clarity. Very highly recommended.

https://www.stereophile.com/content/audio-research-i50-integrated-amplifier

I experienced one bug with the amplifier’s control software. Occasionally, the amplifier spontaneously went into standby mode, at least as indicated by the Lexitubes’ single dots, while the tubes all remained powered up. This could be some sort of tube-protection feature except that it didn’t seem related to playback level; the average voltage the last time it happened was <3V RMS, and it never occurred during high-power measuring on the test bench. Pressing the Power button on the amplifier’s top panel, after waiting the requisite 3 minutes, always brought the I/50 back into action.