Accuphase PX-600 Brochure
m Power amplifier with six identical channels m Parallel push-
pull output stages rated for 100 W x 6 (8 ohms) or 150 W x 6 (4
ohms) m Bridged operation yields 300 W x 3 (8 ohms) m Current
feedback principle combines excellent sound quality with stable
operation m 700 VA Super Ring toroidal transformer
The solution for high-end multi-channel surround sound six totally separate power units with identical performance deliver ample po wer: 150 W × 6
(4 ohms), 100 W × 6 (8 ohms). Robust power supply with lar ge 700 VA toroidal transformer . Curr ent feedback topology assures excellent high-frequency
characteristics. Bridged mode produces stunning 300 W × 3 (8 ohms).
The CX-260/PX-600 is the long-awaited
preamplifier/power amplifier combination from
Accuphase designed from the ground up for
multi-channel surround systems that aim for
absolute top quality in picture and in sound.
Accuphase's extensive e xperience in the realm
of pure audio is in evidence ev erywhere in these
components. Finally, the true audiophile can
move beyond two-channel stereo and build a
system that provides audiovisual enjoyment
without making any sacrifices when it comes to
sonic accuracy. Discover a new world where
sound and image blend to form a home theater
with true high-end performance.
The Power Amplifier PX-600 incorporates six
identical high-performance amplifiers, making
it possible to reproduce six channels with topnotch quality. The amazingly realistic sound
stage and dynamic scale that can be created
with the PX-600 go far beyond the limitations of
conventional surround sound. The capability for
bridged mode operation allows further upgrading of the unit to sustain, for example, three highoutput channels. Various configurations ranging from one to six channels can be realized,
combining flexibility with superb sonic performance.
amping setup. In combination with a multichannel divider, 2-wa y or 3-way systems as well
as subwoofer enhanced systems can also be
configured.
Parallel push-pull output stages for ample power
6-channel operation: 150 W × 6 (4 ohms), 100 W × 6 (8 ohms)
2-channel operation: 220 W × 2 (4 ohms), 130 W × 2 (8 ohms)
The output stage uses high-power transistors
rated for a collector dissipation of 150 watts and
collector current of 15 ampere. These devices
offer extraordinarily wide and flat frequency
response, and their forward-current transfer ratio
linearity as well as their switching characteristics
are excellent. These devices are arranged in a
parallel push-pull configuration (Figure 2) and
mounted to very large aluminum diecast heat
sinks for efficient cooling.
Bridged mode generates even more output
muscle
3-channel bridged operation: 320 W × 3 (6 ohms), 300 W x 3 (8 ohms)
2-channel bridged operation: 420 W × 2 (6 ohms), 350 W x 2 (8 ohms)
For bridged mode, two amplifiers with opposite
polarity are driven with a reverse-phase input
signal, and the output of both amplifiers is
combined before being sent to the speaker . This
allows upgrading to even higher power,
providing ample reserves even with very
demanding source material.
Current feedback circuit topology prevents
high-range phase shifts
The PX-600 uses the signal current rather than
the more conventionally used voltage for feedback. The impedance at the current feedback
Principle of current feedback amplifier
Six totally separate power units with
identical performance allow operation in one
to six channels
Figure 1 shows a block diagram of the PX-600.
The six high-quality power units can reproduce
for example the 5.1ch sound from a D VD pla yer
source with unprecedented realism and
authority. It is also possible to bridge two bloc ks
each, and to combine normal mode and bridged
mode operation. This results in utmost fle xibility ,
covering a range from 1 to 6 channels. For
example, you can enjoy two-channel stereo in
pure audio fashion or realize a high-class bi-
✻ Do not stack the CX-260 and PX-600.
Fig. 1 Block diagram of PX-600
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