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INTRODUCTION
Thank you for your purchase of the Krell REFERENCE 64
Digital-to-Analog Processor and welcome to the Krell family of
audio components. Krell is dedicated to the development of
technologically advanced components for the reproduction of
digitally recorded music. The REFERENCE 64 redefines excel-
lence in the Krell tradition of uncompromising performance
through leading-edge technology.
The REFERENCE 64 is designed to sound wonderful, but to
look and function as a world-class, reference-caliber compo-
nent. The REFERENCE 64 utilizes all proprietary Krell cir-
cuitry. The digital input is decoded by the Krell Data Recovery
and Jitter Rejection Module, virtually eliminating jitter and
associated clocking errors. To further reduce the potential of
clocking errors, the TimeSync linking system allows the
REFERENCE 64 to lock and operate with the CD transport’s
clock output. The data signal is run through four serial
Motorola DSP-56001 processors (two per channel, in series)
running Krell written software contained within socketed
EPROMs. This method allows for simple installation of future
software updates. Within the digital section, data is
oversampled 64 times. Data then goes through Krell’s own
custom DAC modules. After conversion is complete, signal is
passed through the DC coupled, discrete, complementary
Class A output stage. The REFERENCE 64 utilizes separate
highly regulated power supplies containing three 50VA toroidal
transformers. All power supply circuitry is housed in a sepa-
rate chassis, and mechanically linked to ensure proper ther-
mal stability. Each digital input in the REFERENCE 64 has its
own selection button and direct~ path to the processing stages.
Assembly of this product is second to none. Every section is
assembled within rigid quality control standards. The REFER-
ENCE 64 is a pleasure to use and will bring many years of
listening fulfillment.
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