It may very well be. The Dan A’gostino amplifiers are not known to be transparent. Interestingly, the 5W SINAD of the $300K amp is actually slightly worse than these Emotiva’s.
Sidebar 3: Measurements For logistical reasons, I measured a different sample of the Dan D'Agostino Master Audio Systems Progression M550 monoblock (serial number PM006P) with my Audio Precision SYS2722 system (see the January 2008 "As We See It"). I repeated some of the measurements with the...
www.stereophile.com
The classic Krell sound isn’t transparent either
Sidebar 1: Measurements
www.stereophile.com
The Evolution line also pales at 5W SINAD
Sidebar 3: Measurements I don't have the necessary equipment to test the Krell components in their current-mode (CAST) operation. Therefore, I performed all the technical tests using conventional voltage-mode drive, in both balanced and unbalanced operation.
www.stereophile.com
It’s hard to ABX a noisy tube amp against a straight wire with gain. This suggests that the most important issue will be power and current capability. The short term current and low impedance EPDR may be better with some traditional designs.
But I am with you, Class D has a lot of benefits with good trade offs for many. My most expensive amp is a Marantz PM-10, so I genuinely have voted with my wallet that way. I am still very happy with my Yamaha MX-A5000.
Magico M9 is rated to 2000W into 4 ohms, so presumably short term burst are tolerated at higher watts! It has a staggering 94 dB efficiency.
But at 30 ft listening distance, that’s 107 dB peaks.
@aliqaz has a 20 ft listening distance so the 2000W gets him to 114 dB.
The Boulder’s measure well
Sidebar 3: Measurements Because of the Boulder 2150's bulk and weight319 lbs in its shipping crateI wouldn't have been able to get it down the stairs to my test lab, much less back up those stairs. So I packed up my Audio Precision SYS2722 system (see the January 2008 "As We See It") and the PC...
www.stereophile.com
It would be interesting to see if this amp was unusually good at low impedances.