Kenwood AX-7 - Manual (Page 2)

Front Loudspeakers
Exclusive 2-way loudspeakers that incorporate a third full range
satellite loudspeaker in the upper part. The frequency range of the
satellite loudspeaker and its direction towards the listener has been
calculated to reproduce clear sound effects, music or clear dialogue
depending on the selection
Clear Voice Sound , “Movie” or “Music” mode.
If Virtual Front Surround has been selected, the upper satellite
loudspeakers reproduce the surround channels to create a natural and
realistic surround sound with impressive impact.
Virtual Front Surround
A Surround System based on an original Kenwood algorithm (VFS III) written for the
ADI (Analog Devices Incorporated) processor, which offers the experience and sensation
of spectacular surround sound with only two front speakers using a 2-way speaker system
and also incorporating an independent satellite speaker.
Music Mode
The Music Mode adapts the acoustic field to
reproduce music with great realism, atmosphere
and natural sound. This feature is applicable for
Virtual Front Surround as well as Clear Voice Sound.
Adjustable Acoustic Field
Wide
28-bit Digital audio signal processor with
Sigma DSP technology from Analog Devices
Movie Mode
The Movie Mode adapts the acoustic field to a
dynamic surround sound during movie
reproduction offering sensational and realistic
surround effects. This feature is applicable for
Virtual Front Surround as well as Clear Voice Sound.
Clear Voice Sound
The center channel is one of the most
important channels in good multi-
channel reproduction. Processed sound
tracks with 5.1 or more channels dedicate
a special frequency range to the center
channel to make dialogue and voice
sound emanate from the center of the
screen in a stable and detailed way. With
the “Clear Voice Sound” technology for
clear and natural sound, the voices are
well reproduced, detailed and clear.
When Clear Voice Sound mode has been selected,
the Center speaker information is assigned to the
full-range satellite speaker, located in the upper
part of the loudspeaker enclosure. In that case the
combined Front and Surround signals are
assigned to the 2-way speaker section.
Satellite speaker
used for the Center
or Surround channel
r e p r o d u c t i o n
depending on VFS or
Clear Voice Sound
setting.
DSP
The ' Auto Room EQ' feature executes an automatic
equalization for the optimal balance of sound level,
timbre and phase at the listening position. After
locating the microphone at the listening position, the
processor analyzes the time that the signal takes from
each loudspeaker to the microphone. The delay time
between both loudspeakers serves to compensate and
to adjust the sound image. The compensation is carried
out to obtain optimal frequency characteristics in the
listening area. The equalization process compensates
for the losses in timbre due to absorption of produced
overtones and cancellation of reflections caused by
curtains or other elements of absorption in the room. It
also analyzes the reflections and bounces of the signal
due to reflecting walls, windows or other surfaces.
Through analysis of white noise transferred from the
loudspeakers to the microphone, the Sigma DSP
processor defines the suitable equalization curve to
achieve optimal sound quality at the listening
position.
Auto Room EQ (Full Automatic Equalization to adapt to the listening environment)
A Calibration Microphone is
provided with the system to
analyze frequency response, sound
pressure and time alignment, using
the Auto-Room-EQ functions via
the Sigma DSP processor.
The listening position is nearer to the left loudspeaker.
The right loudspeaker is located in a bookcase at a
higher position than the left one.
After analysis the right loudspeaker virtually moves to
create optimal acoustic symmetry.
It is possible to listen to the Kenwood HD20GA7 portable hard
disc player via the AX-7 and operate it with the system remote
control if connected by a special cable (PNC-150) with 3.5mm
plug.
HD20GA7 (optional)
Portable hard disc player with
Clear Digital Amplifier and a
20Gb hard disc connected to the
AX-7 audio/video system by
PNC-150 cable.
The M-AX7 is the special power stage of the AX-7 incorporating 4
independent power broadband high fidelity amplifiers. The
amplifiers produce 25 Watts each and can be bridged to two
stereo channels of 50 Watt each.
The pre-amplifier C-AX7 sends the corresponding signals of
Virtual Front Surround or Clear Voice Sound to the M-AX7 which
1kHz 10kHz 20kHz 80Hz
D-BASS curve shape in Music Mode
Narrow 'Q'
1kHz 10kHz 20kHz 80Hz
D-BASS curve shape in Movie mode
Wide 'Q'
60Hz 110Hz
The D-BASS III system accentuates the low frequency band in an
effective and suitable way according to the listening mode. The
“Q” (relation between the gain and the bandwidth) adapts in an
optimal way to music or film reproduction. The result is a warm
sound with tight bass in music mode where the bass is powerful
and with impact where needed during movie reproduction.
High Fidelity Speakers
In addition to the full range surround
speaker located in the upper part of the
Loudspeaker, used for dialogue and
effects, the speaker system incorporates a
2-way speaker system with a 12 cm cone
type woofer and a 2.5 cm balanced dome
tweeter. The speakers are magnetically
shielded to make setting next to the TV
possible. Thanks to the powerful amplifier,
the unique sound features, and the high
quality construction and sound of the
loudspeakers, the AX-7 turns out to be a
winner in the market.
L
180º
Power amplifier circuit based on the BTL (Bridge-Tied Load) principle. In
the diagram the amplifiers are indicated as 4 triangles used in high
power stereo listening. Each channel uses a pair of bridged amplifiers in
contra phase to duplicate the power.
amplifies them and passes the signals to each dedicated speaker unit. For stereo sound, the signals are
sent to the 2-way speaker part of the front loudspeakers. In stereo mode, the full range satellite
loudspeakers are not in use. In the AX-7 Kenwood uses a fully discrete amplifier section for clear and
powerful sonic performance.
R
180º
5.1
4 VFS
4 CVS
Multichannel Sound
DVD
Vídeo
Virtual Surround effect giving the impression of sound
emanating from separate rear speaker enclosures.
Acoustic Impression (Wide Control) adjustment.
Allows the listener to 'virtually' match the dimensions of the listening
room by expanding or reducing the sound field.
2 way speaker system
in Stereo mode
Connectivity and Control
M-AX7 4-channel Power Amplifier
D-BASSIII System