"Of all the audiophile components available today, I've never seen a product that's so loathed and beloved as Tact Audio's digital products. Digital was supposed to be the perfect sound when it was introduced a couple of decades ago. With all the advancements duly noted, audiophiles contend that vinyl still rules. They argue vinyl is analogue and digital is a facsimile thereof...

One of the many superior benefits of the Tact M2150 digital amplifier over analogue ones is that it operates close to 95% efficient and thus, does not run hot. The 2150's lack of heat sinks helps keep this amplifier light and its appearance lithe. Don't be fooled by the ripples that run along its sides; they were designed more for aesthetic appeal rather than heat dissipation. The 2150 features a zero feedback design and, at full volume (voltage), the power supply is a full 58 volts, equal to 150 Watts into 8 Ohms. To decrease the volume, the output voltage of the power supply is also reduced. This means that the volume control offers no active circuitry, which by the way, has been proven as an ideal method for excellent volume control when Ed Meitner used this method in his fabulous BiD in years past. Additionally, due to the voltage modulation used to control volume, the 2150 is purported to be impervious to clipping.

Physically, the 2150 looks like any Tact product with its large and omnipotent master wheel that serves as both its volume control and company's greatest spokesman. The "M" in M2150 stands for Master version because it employs a separate volume control, while the $500 less expensive "S" or Slave version, designed to go in tandem with Tact's preamps, does not. Mine arrived with the finely brushed black aluminum fascia (silver is optional). In terms of physical layout, the Tact 2150 looks pretty clean and simple, given its capabilities. Below the Tact Audio insignia, located on its upper left corner is the power button. Digital and Analogue selection toggle buttons are located on the left flank while the right side is balanced out by the master volume and mute buttons. A mere five buttons hide the Tact's labyrinth of sub-menus located via its remote control..."

"Few Exhibits, indeed, could compete with the Tact system for revealing both the true timbres and the original acoustics."