JBL AVA7 User Manual
JBL PERFORMANCE™SERIES
AVA7
HIGH-PERFORMANCE
7-CHANNEL
POWER AMPLIFIER
OWNER’S GUIDE
VA7 POWER AMPLIFIER
A
3 Important Safety Precautions
4 Introduction and Features
5 Operation and Controls
Connecting Your JBL Performance Series System
7
9 Installing the AVA7
10 Troubleshooting
11 AVA7 Specifications
®
READ FIRST! IMPORTANT SAFETY PRECAUTIONS!
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
l
iterature accompanying the appliance.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: To reduce the risk of electric shock,
d
o not remove cover (or back).
No user-serviceable parts inside.
Refer servicing to qualified service personnel.
C
AUTION: To prevent electric shock,
do not use this (polarized) plug with
an extension cord, receptacle or other outlet
u
nless the blades can be fully inserted to
prevent blade exposure.
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute
a risk of electric shock to persons.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near
water.
6. Clean only with a dry cloth.
7. Do not block any ventilation
openings. Install in accordance
with the manufacturer’s instructions.
8. Do not install near any heat sources
such as radiators, heat registers, stoves
or other apparatus (including amplifiers)
that produce heat.
9. Do not defeat the safety purpose of
the polarized or grounding-type plug. A
polarized plug has two blades with one
wider than the other. A grounding-type
plug has two blades and a third ground
ing prong. The wide blade or the third
prong is provided for your safety. If the
provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being
walked on or pinched, particularly at
plugs, convenience receptacles and
the point where they exit from the
apparatus.
11. Only use attachments/accessories
specified by the manufacturer.
12. Use only with the cart, stand,
tripod, bracket or table specified by the
manufacturer or sold with the apparatus. When a cart is used,
use caution when moving the cart/apparatus
combination to avoid
injury from tip-over.
nplug this apparatus during light-
13.U
ning storms or when unused for long
periods of time.
14. Refer all servicing to qualified
service personnel. Servicing is required
when the apparatus has been damaged
in any way, such as power-supply cord
r plug is damaged, liquid has been
o
pilled or objects have fallen into the
s
apparatus, the apparatus has been
exposed to rain or moisture, does not
operate normally, or has been dropped.
15. Do not use attachments not recommended by the product manufacturer,
as they may cause hazards.
16. This product should be operated
only from the type of power source indicated on the marking label. If you are
not sure of the type of power supply to
your home, consult your product dealer
or local power company
. For products
intended to operate from battery power,
or other sources, refer to the operating
instructions.
17. If an outside antenna or cable
system is connected to the product,
be sure the antenna or cable system
is grounded so as to provide some
protection against voltage surges
and built-up static charges. Article
810 of the National Electrical Code,
ANSI/NFPA 70, provides information
with regard to proper grounding of the
mast and supporting structure, grounding of the lead-in wire to an antenna
discharge unit, size of grounding conductors, location of antenna-discharge
unit, connection to grounding electrodes, and requirements for the
grounding electrode. See Figure A.
Figure A.
Example of Antenna Grounding as per
National Electrical
Code ANSI/NFP
A 70
8. An outside antenna system should
1
not be located in the vicinity of overhead power lines or other electric light
or power circuits, or where it can fall
into such power lines or circuits. When
installing an outside antenna system,
extreme care should be taken to keep
rom touching such power lines or cir-
f
uits, as contact with them might be
c
fatal.
19. Do not overload wall outlets, extension cords, or integral convenience
receptacles, as this can result in a risk
of fire or electric shock.
20. Never push objects of any kind into
this product through openings, as they
may touch dangerous voltage points or
short-out parts that could result in a fire
or electric shock. Never spill liquid of
any kind on the product.
21. The apparatus shall not be exposed
to dripping or splashing, and no objects
filled with liquids, such as vases, shall
be placed on the apparatus.
22. Do not attempt to service this product yourself, as opening or removing
covers may expose you to dangerous
voltage or other hazards. Refer all servicing to qualified service personnel.
23. When replacement parts are
required, be sure the service technician
has used replacement parts specified
by the manufacturer or that have the
same characteristics as the original
part. Unauthorized substitutions may
result in fire, electric shock or other
hazards.
24. Upon completion of any service or
repairs to this product, ask the service
technician to perform safety checks to
determine that the product is in proper
operating condition.
25. The product should be mounted to a
wall or ceiling only as recommended by
the manufacturer.
HCGUL1492/6500 04/2004 EN
3
NTRODUCTION AND FEATURES
I
uto Turn-On and Power-Sequencing
INTRODUCTION
Congratulations on your purchase of
this JBL Performance
power amplifier! You have purchased a
roduct that embodies the best of what
p
JBL has learned about the emotional
power of audio reproduction in more
than fifty years of preeminence in the
ield. This amplifier has been designed
f
and crafted to provide the user with
a high level of sonic performance.
Special attention has been paid to minimizing the number of components in
he audio signal path, resulting in
t
extremely low distortion, excellent
transient response, and wide dynamic
range. JBL products
marks in audio technology,
used as part of a complete JBL
Performance Series system, will bring
the ambience and acoustics of some of
the world’s greatest concert halls and
theaters into your home.
To obtain the best performance from this
amplifier, please be sure to completely
read this user’s manual and use the
AVA7 only in accordance with its
instructions.
™
Series AVA7
set new bench-
and, when
FEATURES
The JBL Performance Series AVA7
power amplifier features the following:
Full Seven-Channel Operation
The AVA7 has been designed to integrate well into the world of multichannel audio. It is designed to reproduce
the latest development in home theater
audio – rear channels, in addition to
side channels – to produce a truly
enveloping sound field. When coupled
with a high-quality subwoofer amplifier,
it is a solid foundation on which to
build a high-performance home cinema
system that will astound the listener
with its power and realism.
High Power Capability
A7 provides a satisfying 125
V
The A
watts per channel of distortion-free
audio (<0.01% THD) into 8 ohms.
Because of their power capabilities,
JBL Performance Series amplifiers have
an extremely wide dynamic range, an
element critical to realistic home cinema.
Sound levels equal to those at original
performances are easily re-created in
even the largest of home listening
environments.
A
Circuitry
When used in a JBL Performance
System, the AVA7 can be turned on
automatically whenever the surround
processor is activated. No longer do
you have to get out of that chair to turn
on the various pieces of equipment in
your entertainment system; just one
ouch on the remote control of the sur-
t
round processor, and you’re a few seconds away from a truly impressive
audio presentation!
Modern amplifiers produce more
power per channel (and frequently
have more channels) than those of the
traditional two-channel stereo era. Due
to the high current demands of power
amplifiers at the instant of turn-on,
the AVA7 amplifier is equipped with
a power-sequencing circuit that
turns on each amplifier in a delayed
sequence, avoiding the large instantaneous current demand (and possible
circuit breaker tripping) that may occur
should more than one amplifier turn on
at the same instant.
Quiet Cooling
The AVA7 utilizes two fans to cool the
amplifier channels, ensuring long-term
reliability. To reduce fan noise to an
absolute minimum, a thermal-sensing
and control circuit, which senses
increases in temperature within the
amplifier and powers the fans at a
speed proportional to that temperature
increase, has been incorporated in the
JBL Performance Series AVA7. As a
result, the fan is never turning faster
than necessary
that is generated is masked by the program being listened to.
Comprehensive and Isolated Circuit
Protection
VA7 amplifier employs sophisti-
The A
cated protection circuitry (one for each
channel) that senses many possible fault
conditions, such as shorted loudspeaker
wires or excess power demand, and
turns the affected channel(s) off until
the fault condition is removed, at which
time normal operation is automatically
restored. While protection of this sort is
not uncommon in today’s well-designed
amplifiers, a remarkable feature of the
JBL Performance AVA7’s protection circuits is that they are optically coupled
to the signal circuit; there is no direct
, and most of the noise
lectrical connection between the sig-
e
nal path and the protection circuitry. As
a result, there can be no coloration of
the music, no interaction between protection and amplification, until certain
thresholds are exceeded, at which
point the channel(s) would turn off
completely.
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