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While the latter deserves praise, this unprotected feature with no secondary enable function to avoid such mishaps seems somewhat ill-considered.

What confuses matters further is that class D amps are usually fed analog signals even though a few exceptions are driven by digital signals.

It allows additional corrective math just ahead of the speaker outputs.

It’s simply about mathematical headroom however. There are also coaxial and Toslink digital outputs. After filtering out the switching frequency components, the outputs of course pass analog signal.

The sound lost luster and drive. It belongs to the still rarer species of digitally driven class D amplifier which process the signal in the digital domain. Also the M2 was far from happy when sharing a duplex with an idling Fonel Emotion while playing itself.

While on power and AC, the M2 reacts audibly to correct power polarity. Shortly afterwards, the display shows shortcut probably triggered by clippingthen there’s sudden blessed silence.


Envision a basic pocket calculator. This gets us to the NAD M2. My 16A AC line created no bottle neck however. At first glance this makes no sense.

The M2 draws a lot of current which theoretically could challenge your residential circuit breaker system. While the basic operation of this very energy-efficient approach does resemble digital by consisting of just two switch modes of the output devices—on and off like 1 and 0—the more common pulse width modulation technique is actually defined by the duration between switch changes.

In the latter case, PCM signal of digital sources like CD or network players connects directly to the amplifier input.

The – um, protection circuitry of NAD works reliably. NAD then warns that “due to its special technologies and high-frequency shielding, the M2 must be plugged into a properly grounded socket, i.


Most of you already know that class D stands for neither class Digital nor means that this class of operation is digital per se. Before getting into sonics, two more housekeeping items. Then its outputs are fixed and its volume control bypassed.

While playing with p-50000 dB range under signal, an unintentional click too far and all hell breaks loose. A calculator with 35 digits will produce more accurate results.

Accuphase P-400 & Luxman C-5000A

In collaboration with Manchester-based semiconductor specialist Zetex, NAD has developed a circuit topology which “corrects even the smallest pulse deviation” by comparing the PCM input signal against an internally generated PWM acculhase signal. Coddling and all that. Schuko users should experiment with our bidirectional EU plugs to be sure. This described an actual occurrence in my digs accompanied by very accelerated heart beat.


Used Accuphase P Stereo power amplifiers for Sale |

Accuhpase concept begs for a bevy of digital inputs and NAD offers five: The M2 has a snazzy display whose text could be a few picas larger however to remain visible accupase the couch without strain. As is customary for our own reviews, the writer’s signature at review’s end shows an e-mail address should you have questions or wish to send feedback. If it accepts digit figures, subsequent calculations can easily exceed those digits. This review page is supported in part by the sponsors whose ad banners are displayed below.

While digital signal is processed up to 24 bits and analog automatically converted to 24 bits, NAD actually talks of bit math.

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