NuPrime
4
Background
In 2005, NuForce invented an amplifier that utilizes self-oscillating switching principles in an analog-
based topology (US patent #7,221,216 ) as a significant departure from bulky Class A/AB designs using
tubes or transistors, and Class-D digital designs that convert signals into digital data. Thanks in full
measure to unique innovations, the NuForce Reference 9 amp received the Power Amp of The Year 2005
award from The Absolute Sound, a prestigious American audiophile magazine. Subsequent versions of the
Reference 9 received similar awards in Japan and France.
In 2014, NuForce, having decided to focus on mobile products, sold the high-end line along with its
technology to investors who then created NuPrime Audio. Under the leadership of NuForce co-founder
and original CEO, NuPrime has assembled a design team comprised of talented engineers who earlier
worked on NuForce’s high-end line along with newly recruited experts in switching-power circuit design.
Recent developments have made it possible to redesign NuPrime’s switching amp topology from the
ground up in order to create a new generation of amps that allow NuPrime to precisely tailor sonic
characteristics.
NuPrime is
not
a Switching Digital Amplifier
Switching Digital Amps, commonly known as Class-D, first appeared some decades ago. From the start,
Class-D showed enormous potential along with significant shortcomings: limited usable bandwidth, and a
fixed saw-tooth waveform for audio-signal modulation accompanied by jitter that masks low-level
signals.
Instead of the conventional saw-tooth configuration, NuPrime’s patented circuit design uses a naturally
occurring analog-modulating signal that adds neither noise nor jitter. Rather than reverting to off-the-
shelf solutions, NuPrime’s in-house advances have further unlocked the switching amp’s potential
without the difficulties pure digital-switching amplifiers simply cannot avoid – in other words, the best of
both worlds.
Goodbye, heat. Goodbye, hernias.
Once upon a time heat and bulk were badges of status. Today, they’re the bane of obsolescent technology.
NuPrime amps switch at 600,000Hz – more than 10X the CD sampling rate. At these frequencies,
transformers and capacitors work far more efficiently, thus making it possible to reduce their size.
Typically, Class-A amps rarely utilize more than 30% of the power they draw; the rest is wasted as heat.
Summary of Contents for MCH-K38
Page 1: ...NuPrime MCH K38 ...
