Harman Kardon AVR 270 Service Manual ▷ View online
12
AVR
Introduction to Home Theater
Introduction to Home Theater
this introductory section will help you to familiarize yourself with some basic concepts
unique to multichannel surround-sound receivers, which will make it easier for you to set
up and operate your Avr.
Typical Home Theater System
A home theater typically includes an audio/video receiver, which controls the system
and supplies amplification for the loudspeakers; a disc player; a source component for
television broadcasts (cable box, satellite dish receiver, hdtv tuner or antenna connected
to the tv); a tv or video display; and multiple loudspeakers.
Multichannel Audio
the main benefit of a home theater system is its ability to produce “surround sound.”
Surround sound uses multiple speakers and amplifier channels to immerse you in the
audio/video presentation for a dramatically increased sense of realism.
your Avr may have up to seven main speakers connected directly to it, plus a subwoofer.
your Avr may have up to seven main speakers connected directly to it, plus a subwoofer.
each main speaker is powered by its own amplifier channel inside the Avr. A system
with more than two speakers is called a multichannel system. the different main speaker
types in a home theater system are:
• Front Left and Right: the front left and right speakers are used as in a two-channel
system. In many surround-sound modes, these speakers are secondary, while the
main action, especially dialogue, is reproduced by the center speaker.
• Center: when you are watching movies and television programs, the center speaker
reproduces most of the dialogue and other soundtrack information, anchoring it with
the picture. when you are listening to a musical program, the center speaker helps
to create a seamless front soundstage, creating a realistic “you-are-there” listening
experience.
• Surround Left and Right: the surround left and right speakers produce ambient
sounds that help create a realistic and immersive surround-sound environment.
they also help recreate directional sound effects such as aircraft flyovers.
• Surround Back Left and Right: Surround back channel speakers are used with
surround modes such as the dolby digital ex, dolby digital plus, dolby truehd, dtS-
eS
®
(discrete and matrix), dtS-hd
™
high resolution Audio, dtS-hd master Audio
™
and logic 7
®
7.1 modes that are designed for 7.1-channel systems.
• Front Height Left and Right: your Avr includes dolby pro logic IIz decoding, which
uses the Avr’s Assigned Amp channels as front height channels. the addition of
front height channels – an additional pair of speakers positioned above the front left
and right speakers – produces a surround-sound experience with added depth and
dimension by creating lifelike sound that comes at you from varying heights.
note: you can set up your system to use either surround back speakers or front height
speakers; you cannot use both.
the surround back channel speakers are optional. If your system does not include
the surround back channel speakers are optional. If your system does not include
surround back left and right speakers, you can set up your Avr with a 5.1-channel
surround-sound system in the main listening area, and you can reassign the surround
back channel amplifiers to power loudspeakers located in another room in a multizone
system. (Alternately, you can reassign the surround back channel amplifiers to power
front height speakers for use with dolby pro logic IIz. See Manual Speaker Setup, on
page 36, for more information.)
many people expect the surround speakers to play as loudly as the front speakers.
many people expect the surround speakers to play as loudly as the front speakers.
Although you will calibrate all of the speakers in your system to sound equally loud at the
listening position, most artists use the surround speakers for ambient effects only, and
they create their programs to steer relatively little sound to these speakers.
• Subwoofer: A subwoofer is designed to play only the lowest frequencies (the deep
bass). It augments smaller, limited-range main speakers that are usually used for
the other channels. many digital-format programs, such as movies recorded in
dolby digital, contain a low-frequency effects (lfe) channel that is directed to the
subwoofer. the lfe channel packs the punch of a rumbling train or airplane, or the
power of an explosion, adding realism and excitement to your home theater. Some
people use two subwoofers for additional power and for even distribution of the
sound.
Surround Modes
there are different theories as to the best way to present surround sound and to
distribute each audio channel’s sounds to the surround-sound system’s speakers.
A variety of algorithms have been developed in an effort to recreate the way we hear
sounds in the real world, resulting in a rich variety of options. Several companies
have developed different surround-sound technologies, all of which can be accurately
reproduced by your Avr:
• Dolby Laboratories: dolby truehd, dolby digital plus, dolby digital, dolby digital
ex, dolby pro logic
®
IIx and IIz.
• DTS: dtS-hd high resolution Audio, dtS-hd master Audio, dtS, dtS-eS (discrete
and matrix), dtS neo:6
®
, dtS 96/24
™
.
• HARMAN International: logic 7
®
, hArmAn virtual speaker, hArmAn headphone.
• Stereo Modes: generic modes that expand upon conventional two-channel stereo,
including 5ch and 7ch Stereo.
Appendix table A12, on page 50, contains detailed explanations of the different surround-
sound options available on your Avr. digital surround-sound modes, such as the dolby
digital and dtS modes, are available only on specially encoded programs, such as those
available via hdtv, dvd and blu-ray disc media and digital cable or satellite television.
other surround modes may be used with digital and analog signals to create a different
surround presentation or to use a different number of speakers. Surround-mode selection
depends upon the number of speakers in your system, the program you are watching or
listening to, and your personal tastes.
13
English
AVR
Place Your Speakers
Place Your Speakers
determine the locations for your system’s speakers according to their manufacturer’s
directions and the layout of your listening room. use the illustrations below as a guide for
7.1-channel and 5.1-channel systems.
to create the most realistic surround-sound environment possible, you should place
to create the most realistic surround-sound environment possible, you should place
your speakers in a circle with the listening position at its center. you should angle each
speaker so it directly faces the listening position. use the diagrams below as a guide.
tv
c
fl
fr
Sl
Sr
Sub
Speaker positioning for 5.1-channel Systems
tv
c
fl
fr
Sbl
Sr
Sl
Sbr
Sub
tv
c
fl
fhl*
fhr*
fr
Sr
Sl
Sub
* fhl and fhr speakers should be at least
3 ft (0.9m) above the fl and fr speakers.
Speaker positioning for 7.1-channel Systems
(top: with Surround back Speakers; bottom: with front height Speakers)
NOTE: In a 7.1-channel system, you must choose to use either surround back speakers
or front height speakers – you cannot use both simultaneously.
Placing the Left, Center and Right Speakers
place the center speaker either on top of, below or mounted on the wall above or below
the tv or video display screen. place the front left and right speakers along the circle,
about 30 degrees from the center speaker and angled toward the listener.
place the front left, front right and center speakers at the same height, preferably at
place the front left, front right and center speakers at the same height, preferably at
about the same height as the listener’s ears. the center speaker should be no more than
2 feet (0.6m) above or below the left/right speakers. If you’re using only two speakers
with your Avr, place them in the front left and right positions.
Placing the Surround Speakers in a 5.1-Channel System
you should place the left and right surround speakers approximately 110 degrees from
the center speaker, slightly behind and angled toward the listener. Alternatively, place
them behind the listener, with each surround speaker facing the opposite-side front
speaker. you should place the surround speakers 2 feet – 6 feet (0.6m – 1.8m) higher
than the listener’s ears.
Placing the Surround Speakers in a 7.1-Channel System
In a 7.1-channel system, place the side surround speakers 90 degrees from the center
speaker, directly to either side of the listening position. place the surround back left and
right speakers 150 degrees from the center speaker, directly facing the opposite-side
front speaker. you should place all the surround speakers 2 feet – 6 feet (0.6m – 1.8m)
higher than the listener’s ears.
Placing Front Height Speakers in a 7.1-Channel System
your Avr includes dolby pro logic IIz decoding, which uses the Avr’s Assigned Amp
channels as front height channels. the addition of front height channels – an additional
pair of speakers positioned above the front left and right speakers – produces a surround-
sound experience with added depth and dimension by creating lifelike sound that comes
at you from varying heights.
we recommend placing front height speakers at least 3 feet (0.9m) higher than the front
we recommend placing front height speakers at least 3 feet (0.9m) higher than the front
left and front right speakers, and directly above or farther apart than the front left and
right speakers. the higher and further apart you place the front height speakers, the more
you should angle them down and in toward the listening position.
NOTE: your receiver will sound its best when the same model or brand of loudspeaker
is used for all positions.
Placing the Subwoofer
because a room’s shape and volume can have a dramatic effect on a subwoofer’s
performance, it is best to experiment with placement so that you will find the location
that produces the best results in your particular listening room. with that in mind, these
rules will help you get started:
• placing the subwoofer next to a wall generally will increase the amount of bass in
the room.
• placing the subwoofer in a corner generally will maximize the amount of bass in
the room.
• In many rooms, placing the subwoofer along the same plane as the left and right
speakers can produce the best integration between the sound of the subwoofer and
that of the left and right speakers.
• In some rooms, the best performance could even result from placing the subwoofer
behind the listening position.
A good way to determine the best location for the subwoofer is by temporarily placing it in
the listening position and playing music with strong bass content. move around to various
locations in the room while the system is playing (putting your ears where the subwoofer
would be placed), and listen until you find the location where the bass performance is
best. place the subwoofer in that location.
14
AVR
Types of Home Theater System Connections
Types of Home Theater System Connections
there are different types of audio and video connections used to connect the Avr to your
speakers, your tv or video display, and your source devices. the consumer electronics
Association has established the ceA
®
color-coding standard.
Analog Audio Connection
Color
front left/right
white/red
center
green
Surround left/right
blue/gray
Surround back/front height left/right
brown/tan
Subwoofer
purple
Digital Audio Connection
Color
coaxial (input or output)
orange
optical Input
black
optical record output
gray
Analog Video Connection
Color
component video
red/green/blue
composite video
yellow
Speaker Connections
Speaker cables carry an amplified signal from the Avr’s speaker terminals to each
loudspeaker. they contain two wire conductors, or leads, that are differentiated in some
way, such as with colors or stripes.
the differentiation helps you maintain proper polarity, without which your system’s low-
the differentiation helps you maintain proper polarity, without which your system’s low-
frequency performance can suffer. each speaker is connected to the Avr’s speaker-
output terminals using two wires, one positive (+) and one negative (–). Always connect
the positive terminal on the speaker, which is usually colored red, to the positive terminal
on the receiver, which is colored as indicated in the connection color guide table, above.
the negative terminals on the speakers and the Avr are black.
your Avr uses binding-post speaker terminals that can accept bare-wire cables or
your Avr uses binding-post speaker terminals that can accept bare-wire cables or
banana plugs. bare-wire cables are installed as shown below:
1. Unscrew Cap
2. Insert Bare Wire
3. Tighten Cap
1. unscrew cap
3. tighten cap
2. Insert bare wire
banana plugs are inserted into the hole in the middle of the terminal cap, as shown
below:
A. tighten cap
b. Insert banana connector into hole in cap
A. Tighten Cap
B. Insert Banana Connector
into Hole in Cap
Always connect the colored (+) terminal on the Avr to the (+) terminal on the speaker
(usually red), and the black (–) terminal on the Avr to the (–) terminal on the speaker
(usually black).
IMPORTANT: Make sure the ( + ) and ( – ) bare wires do not touch each other or
IMPORTANT: Make sure the ( + ) and ( – ) bare wires do not touch each other or
the other terminal. Touching wires can cause a short circuit that can damage your
receiver or amplifier.
Subwoofer Connections
the subwoofer is a speaker dedicated to reproducing only the low (bass) frequencies,
which require more power. to obtain the best results, most speaker manufacturers offer
powered subwoofers that contain their own amplifiers. use a single rcA audio cable to
make a line-level (non-amplified) connection from the Avr’s Subwoofer connector to a
corresponding input jack on the subwoofer.
Although the Avr’s purple subwoofer output looks similar to a full-range analog audio
jack, it is filtered so that only the low frequencies pass through it. don’t connect this
output to any device other than a subwoofer.
Source Device Connections
Audio and video signals originate in source devices (components where a playback
signal originates) such as your blu-ray disc or dvd player, cd player, dvr (digital video
recorder) or other recorder, tape deck, game console, cable or satellite television tuner,
an ipod or iphone (connected to the Avr’s uSb port) or an mp3 player. the Avr’s fm/Am
tuner also counts as a source, even though no external connections are needed other
than the fm and Am antennas. Separate connections are required for the audio and video
portions of the source device’s signal, except for digital hdmI connections. the types of
connections you use will depend upon the capabilities of the source device and of your
tv or video display.
Digital Audio Connections – HDMI
there are two types of audio connections – digital and analog. digital audio signals are
there are two types of audio connections – digital and analog. digital audio signals are
required for listening to sources encoded with digital surround modes, such as dolby
digital and dtS, or for uncompressed pcm digital audio. your Avr has three types of
digital audio connections: hdmI, coaxial and optical. do not use more than one type of
digital audio connection for each source device. however, it’s okay to make both analog
and digital audio connections to the same source.
your Avr is equipped with seven rear-panel hdmI input connectors, and one hdmI
your Avr is equipped with seven rear-panel hdmI input connectors, and one hdmI
monitor output connector. (the Avrs also have a front-panel hdmI input connector.) hdmI
technology enables digital audio and video information to be carried using a single cable,
delivering the highest quality picture and sound. If your tv or video display device has an
hdmI input connector, make a single hdmI connection from each source device to the
Avr. usually, a separate digital audio connection is not required.
the Avr’s hdmI output connection contains an Audio return channel (Arc) that carries
the Avr’s hdmI output connection contains an Audio return channel (Arc) that carries
a digital audio signal from your tv or video display back to the Avr. It allows you to listen
to hdmI devices that are connected directly to your tv (such as an Internet connection)
without making an additional connection from the device to the Avr. the Arc signal
is active when the tv source is selected. See System Settings, on page 39, for more
information. (the Avr 3700 and Avr 370 have two hdmI output connections.)
the hdmI connector is shaped for easy plug-in (see illustration, below), and hdmI
the hdmI connector is shaped for easy plug-in (see illustration, below), and hdmI
cable runs are limited to about 10 feet (3m). If your video display has a dvI input and is
hdcp-compliant, use an hdmI-to-dvI adapter (not included), and make a separate audio
connection.
15
English
AVR
Types of Home Theater System Connections
Digital Audio Connections – Coaxial
coaxial digital audio jacks are usually color-coded in orange. Although they look like
coaxial digital audio jacks are usually color-coded in orange. Although they look like
standard rcA-type analog jacks, you should not connect coaxial digital audio outputs to
analog inputs or vice versa.
Digital Audio Connections – Optical
optical digital audio connectors are normally covered by a shutter to protect them from
optical digital audio connectors are normally covered by a shutter to protect them from
dust. the shutter opens as the cable is inserted. optical input connectors are color-coded
using a black shutter, while optical outputs use a gray shutter.
Analog Audio Connections
two-channel analog connections require a stereo audio cable, with one connector for
two-channel analog connections require a stereo audio cable, with one connector for
the left channel (white) and one for the right channel (red). these two connectors are
attached to each other.
for source devices that have both digital and analog audio outputs, you may make both
connections. If you are going to be setting up a multizone system, remember that Zone
2 is an audio-only zone (the Avr does not have a Zone 2 video output). therefore, make
analog connections for any audio source devices (such as a cd changer) that you will
want available for listening in Zone 2 at all times.
the analog connections also feed the analog record outputs. you may record materials
the analog connections also feed the analog record outputs. you may record materials
from blu-ray disc recordings, dvds or other copy-protected sources using only analog
connections. remember to comply with all copyright laws if you choose to make a copy
for your own personal use.
Video Connections
many source devices output both audio and video signals (e.g., blu-ray disc, dvd
player, cable television box, hdtv tuner, satellite box, vcr, dvr). In addition to an audio
connection as described above, make a video connection for each of these source
devices. make only one type of video connection for each device.
Digital Video Connections
If you have already connected a source device to one of the Avr’s hdmI input connectors,
If you have already connected a source device to one of the Avr’s hdmI input connectors,
you have automatically made a video connection for that device, since the hdmI cable
carries both digital audio and digital video signals.
Analog Video Connections – Composite Video
your Avr uses two types of analog video connections: composite video and component
your Avr uses two types of analog video connections: composite video and component
video.
composite video is the basic connection most commonly available. both the chrominance
composite video is the basic connection most commonly available. both the chrominance
(color) and luminance (intensity) components of the video signal are transmitted using a
single cable. the jack is usually color-coded yellow and looks like an analog audio jack.
do not connect a composite video jack to an analog audio or coaxial digital audio jack,
or vice versa.
Analog Video Connections – Component Video
component video separates the video signal into three components – one luminance
component video separates the video signal into three components – one luminance
(“y”) and two sub-sampled color signals (“pb” and “pr”) – that are transmitted using
three separate cables that are color-coded green (y), blue (pb) and red (pr). component
video cables that join three separate green, blue and red connectors into a single cable
are sold separately.
If your tv or video display has an hdmI connection, we recommend it as the best quality
connection. your Avr converts composite and component analog video input signals to
the hdmI format, upscaling them to high-definition 1080p resolution.
Click on the first or last page to see other AVR 270 service manuals if exist.