FOREWORD
2
Congratulations and thank you for choosing the OCTAVE tube preamplifier
HP 700
You are about to enjoy the benefits of one of the world’s most innovative and
reliable preamplifiers, the HP 700. Take care of it, and your preamplifier will
provide you with many years of listening pleasure.
You often hear people claim that there has been no real progress in tube am-
plifier design for years. The operating principles of tubes have been docu-
mented extensively and are well known to amplifier designers. The same can,
of course, be said for transistor amplifiers.
Nevertheless, there is still room for further development with both of these tech-
nologies. This is both necessary and desirable. With tube amplifiers in particu-
lar, a general reluctance to depart from the classic circuit designs has not done
the technology any favors. Today's loudspeakers and source equipment pro-
vide better performance than ever before, but also make greater demands on
amplifiers. Modern sound reproduction equipment delivers a level of perfor-
mance at a price that simply would not have been possible 20 or even 10 years
ago.
These advances have been achieved through the application of cutting-edge
technology as it becomes available and affordable.
Integrating these technologies into amplifier design demands a detailed
knowledge of the inner workings of amplifiers and an appreciation of the sonic
ramifications of each modification.
We have specialized in tube amplification for the past 30 years, during which
time we have developed a number of innovative technologies that have earned
us a reputation as one of the leaders in the field.
We hope you will enjoy many hours of wonderful music with your OCTAVE
preamplifier.
Andreas Hofmann
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