NuPrime IDA-6, Руководство пользователя

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06
Background
NuPrime is not a Switching Digital Ampli er
Switching Digital Amps, commonly known as Class-D, rst appeared some decades ago. From the
start, Class-D showed enormous potential along with signi cant shortcomings: limited usable
bandwidth, and a xed saw-tooth waveform for audio- signal modulation, the latter producing jitter
that e ectively masks low-level signals.
Instead of the conventional saw-tooth con guration, NuPrime’s patented circuit design uses a
naturally occurring analog-modulating signal that adds neither noise nor jitter. Rather than reverting
to o -the-shelf solutions, NuPrime’s in-house advances have further unlocked the switching amp’s
potential without the di culties pure digital-switching ampli ers simply cannot avoid – in other
words, the best of both worlds.
Once upon a time heat and bulk were badges of status. Today, they’re the bane of obsolescent
technology. NuPrime amps switch at 500,000Hz – more than 10X the CD sampling rate. At these
frequencies, transformers and capacitors work far more e ciently, 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. High operating temperatures also shorten the useful life of the electrolytic capacitors used in
abundance in these designs.
A comparison with traditional designs is mind-boggling. A NuPrime amp, small enough to sit on the
palm of one’s hand, is, typically, 85% e cient – in practical terms, cool-running and easy on the
utility bill.