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.
4
¡
PERATION AND CONTROLS
O
1. Power Switch
Pushing this button is all that is required to turn on the AVA7 if it is not part of a JBL Performance Series system and
Main Switch § is in the On posi-
the tion. If the amplifier is used as part of a JBL Performance Series system, the Main Switch § and the front-panel push button both be left in the amplifier will then turn on when the surround processor is activated. See the descriptions of the and Trigger Jacks for more informa­tion on turning on the AVA7.
2. Standby Indicator This indicator on the front-panel Power Switch
amplifier is in the “standby” mode, whether operating as part of a JBL Performance Series system or not. When the A this light will turn blue.
3. Input Jacks (Ch. 1 Through Ch. 7)
Seven of the output signals from the JBL Performance Series A processor are connected to the seven input jacks. We suggest the channels be assigned as follows:
Ch. 1 Ch. 2 Right Side Ch. 3 Right Front Ch. 4 Center Ch. 5 Left Front Ch. 6 Left Side Ch. 7 Left Rear
4. Speaker T
Connect the speakers to these termi­nals, following the normal convention; wire the “+” side of the speaker to the red terminal, and the “–” side to the
Power Switch ¡ should
On position. The
Main Switch §
¡ will glow red when the
VA7 is in the “on” mode,
V1 digital
Right Rear
erminals
black terminal. Wire the speakers with the proper polarity; reversing any speaker’s connections will not damage either the speaker or the amplifier, but will result in poor low-frequency per­formance and imprecise imaging.
WARNING: Terminals marked with the flash symbol are hazardous when live. External wiring connected to those ter­minals requires installation by trained personnel, and the use of ready-made lead cords.
NOTE: The minimum load impedance that this amplifier can handle safely is 8 ohms per channel. Using lower imped­ance loads can damage the unit and will void your warranty!
Wire Run Length Minimum Gauge
Up to 20' (6m) Up to 50' (15m) 14 Up to 100' (30m) 12
5. External Fuses
The AC mains fuse is located on the back panel of the amplifier will not blow unless the amplifier is asked to produce more power than its design allows for a prolonged period or to prevent excessive current draw that could damage internal components during a fault condition. The amplifier has been designed to operate under virtually all conditions. Even momentary short-circuiting of the output (speaker) connections will not ordinarily damage the output circuitry (although this will activate internal protection circuitry and could cause one or more of the channels to temporarily mute until the circuit automatically resets).
16
. This fuse
Fuse Replacement
To remove the fuse, turn off the power switch and disconnect the power plug from the AC mains. Remove the fuse holder by lifting up the latch at the bottom and pulling the holder out. When looking at the fuse holder as installed on the back panel, the fuse on the right hand side is the active fuse. The fuse on the left is a spare. Remove the fuse on the right side and visually inspect it to see whether it has opened; if it has, discard it and replace it with the spare glass fuse. Reinstall the holder, and reconnect the AC mains. If after replacing the fuse the unit is inoperative, service is required; contact your JBL dealer.
WARNING: Always unplug the amplifier from the AC mains before removing any fuse.
IMPORTANT:
Never install a fuse that has a higher rating than the one specified on the back panel of the amplifier or in the owner’s manual.
6. Main Switch
Place this switch in the On position at all times during normal use.
7. Trigger Input and Output Jacks
When using the AVA7 amplifier in a JBL Performance Series system with the
V1 Digital Surround Processor
A will need to use the trigger cable set included with the AV1. Connect the DIN end of the cable to the T DIN jack on the rear panel of the AV1, and connect the 1/8" (3.5mm) plug to
rigger Input Jack
the
T
panel of the AVA7.
on the rear
, you
rigger Output
5
VA7 is used with another com-
£
§
¢
If the A ponent (other than the AV1) that uses a trigger for automatic turn-on and turn­off, make sure the other component’s output is between 3 and 24 volts DC. Connect the trigger output jack on the other component to the 1/8" (3.5mm) Trigger Input Jack on the AVA7 using one of the cables included with the AVA7. Whenever a power-on trig­ger is used to operate the AVA7, make sure that the AVA7’s and Power Switch ¡ are both in the
On position. Since the front-panel Power Switch ¡ on the AVA7 is a low-
throw switch, sometimes it may be dif­ficult to confirm whether this switch is in the ensure that this switch is in the position, disconnect the trigger input cable from the A Main Switch § is still on, and then press the LED Then reconnect the trigger cable to the AVA7 source (JBL Performance AV1 or another source unit featuring power trigger) is on, the AVA7’s LED
Indicator
If the Trigger source is off or in standby, the AVA7 will also go into standby and its LED red. Once this setup is complete, the AVA7 will automatically turn on and off along with the source unit.
If you wish to have other components in your system turn on via trigger sure they are compatible with the 1/8" (3.5mm) 12-volt DC on the A
On or Standby position. To
Power Switch ¡ until its
Standby Indicator glows blue.
Trigger Input ¶. If the Trigger
will continue to glow blue.
Standby Indicator will turn
VA7. If they are, you may
Main Switch §
A7, make sure the
V
Standby
Trigger Output Jack
On
-on
, make
connect the the first component’s trigger input using one of the cables included with the
VA7, and then connect all compo-
A nents in daisy-chain fashion. 12V DC voltage at the AVA7
Jack
mately two seconds after the AVA7 receives a 12V DC trigger input signal. This is done to prevent high-current draw on your home’s AC mains supply, which could be caused by multiple high-power audio components turning on at the same time.
8. AC Inlet
Your AVA7 is shipped with an IEC-type removable power cord that mates with the AC inlet on the rear panel. To ensure proper operation, use the supplied power cord. This amplifier is
multivoltage unit
that is not compatible with a 120V AC wall receptacle will void the warranty.
rigger Output Jack
T
Trigger Output
becomes available approxi-
; using a power cord
to
NOT a
, 60Hz
6
Top
#1
#2
AV1
AVA7
ONNECTING YOUR JBL PERFORMANCE SERIES SYSTEM
C
UGGESTED RACK-MOUNTING ORDER
GENERAL INFORMATION
A JBL Performance Series system installation incorporates one power amplifier, in addition to the amplifier(s)
sed to power one or more sub-
u woofers. If your speaker complement includes the JBL Performance Series PS1400 powered subwoofer module,
ou may use the amplifier included in
y each module. If you are using a pas­sive subwoofer, you will need to supply a subwoofer amplifier. All seven chan­nels on the AVA7 are to be used for
riving the left, center, right, both side,
d and both rear speakers.
Use the simplified connection diagram on page 8 to help you understand how to connect the AVA7 amplifier to a JBL Performance Series system. This dia­gram is intended to show the signal flow through the system. For more detail in making these connections, please refer to the owner’s manual for the AV1 Surround Processor.
Connect DIN and audio/video cables between system components, as shown on the following pages. Make sure that on all power amplifiers the main and standby power switches are in the On position. Operated in this mode, all of the components will turn on with one touch of the power button on the sur­round processor’
When connecting the source nent (such as a DVD player) processor, choose an optical digital audio connection, but not both. As a backup, or if analog recordings might be desired in the future, you may also make the left and right analog audio connections.
In addition to the audio connections,
one of the following video con-
select nections, but not more than one: com­posite video, S-video or component video. Remember to make the corre­sponding video monitor output connec­tion from the A device.
s remote control.
-
compo
to the AV1
either a coaxial or
V1 to your video display
S
7
AV1
AVA7
Subwoofer Input
Trigger Input
PS1400 (or other powered subwoofer)
For Future Expansion
WIRING DIAGRAM
8
NSTALLING THE AVA7
PERFO
RMA
NCE
I
Installation of the AVA7 is a straight-
orward process.
f
MPORTANT:
I
The amplifier must be installed following the directions described below. To ensure adequate perform­ance and safety, never install the
mplifier with less free space around
a the amplifier than what is specified.
Always put amplifiers on the bottom of a stack.
Heavy equipment should not be sup­ported solely by the front-mounting locations. It is recommended that addi­tional rear support be used.
1. The JBL Performance Series AVA7 power amplifier has been designed to be mounted in EIA standard racks, or stacked freestanding as long as there is 4 inches (10cm) of free space around the amplifier (sides and rear). If the AVA7 is being mounted in a rack, it is suggested that its feet be removed prior to installation. If the AVA7 will be stacked with other components, use the feet that came attached to the unit. This will ensure that there is suf­ficient air space underneath so that heat can be dissipated effectively. Two rack ears are included with the AVA7. To install these rack ears, remove the four machine screws on each of the two side panels (see drawing), hold each rack ear in place, and attach it to the AVA7 using the same four screws. Make sure that these screws are securely tightened.
Make sure that the amplifiers are
2. located in a well-ventilated, cool area. Be certain that the side and rear panels are not obstructed, as the cooling fan brings air in from the rear and expels it at the sides. It is very important not to obstruct the airflow from the rear panel; heat buildup and premature failure may occur. If the amplifier is installed inside a cabinet that is enclosed on all sides, the front of the cabinet must remain open to allow sufficient flow-through ventilation to avoid overheating.
3. Using a helper to guide the unit into the rack, gently slide the AVA7 into place. Align the rack mounting holes to the rack ears of the equipment rack.
4. Starting with the bottom two screw oles and using two of the rack
h
crews and plastic washers (if sup-
s plied with your rack), secure the AVA7 into the rack. It may be neces­sary to have a helper hold up the
nit until you have started
ear of the
r the threads
u
of the screws. Once the
Side view of amplifier without rack ear.
Side view of amplifier with rack ear attached.
Front view of amplifier with rack ear attached.
bottom mounting screws are
nstalled, move to the top mounting
i
crews. Once done, check and
s tighten all four screws. Always use all four screws when mounting any equipment.
9
ROUBLESHOOTING
T
Problem: Amplifier does not turn on. Neither the red nor blue indicator lights are on.
ake sure that the amplifier is plugged
M in, and verify that there is the proper voltage at the wall outlet. Make sure
Main Switch § on the rear panel
the is in the On position.
Problem: The Standby Indicator lights red, but it does not change to blue when the
epressed.
d If the amplifier is being used in a JBL
Performance Series system, make sure that the surround processor is turned on, the position, and there is a connection between the AVA7’s and another device providing a power­on voltage trigger. Refer to the “CON­NECTING YOUR SYSTEM” section for reference. used with a JBL Performance Series AV1 or any other source providing a power-on trigger voltage signal, make sure that no connection is made to the Trigger Input ¶ of the AVA7.
Problem: There is no sound from the speakers, but the amplifier is on (
Standby Indicator is lit in blue).
1. Make sure that the surround proces-
sor or equalizer is on, and that the correct source has been connected and selected.
2. Make sure that the correct outputs
are connected from the surround processor or equalizer to the amplifier.
3. Make sure that the speakers are
connected to the correct terminals. Check for short circuits at both ends of the speaker cables.
oblem:
Pr
in the system.
1. Make sure that all required cables
are connected between system components. Refer to the “CON NECTING YOUR SYSTEM” section.
2. Make sure that each amplifier
has its On position.
3. Make sure the Power Switch ¡ on
each amplifier is in the On position (so that its in blue when the cable is removed from its T
Power Switch ¡ is
Main Switch § is in the On
Trigger Input
If the amplifier is not being
Not all of the amplifiers turn on
Main Switch § in the
Standby Indicator
rigger Input Jack
).
-
is lit
Problem: Insufficient sound output level from the speakers.
Check that the output levels of the sur-
ound processor or equalizer are set
r properly.
Problem: Insufficient bass.
erify that the speakers have been
V wired to the amplifier with the correct polarity.
roblem: Audible hum from the speakers.
P
1. Check the power outlets and make
sure that there is a solid earth
round present. (The services of an
g
lectrician may be required.)
e
2. Make sure that all signal cables are
routed away from power cords.
3. If these suggestions fail, experiment
by running ground wires between the rear-panel screws of the ampli­fiers and the other system compo­nents, such as the surround proces­sor or signal processing package.
If you still encounter difficulty after trying the above suggestions, call your JBL Authorized Dealer or JBL at
1.516.255.4JBL for further assistance.
10
VA7 SPECIFICATIONS
A
Rated Power Output 125W per channel into 8 ohms, all channels driven
THD <0.01%, 20Hz –20kHz
Input Impedance 20k ohms
Sensitivity 1V in = 100 watts out
Frequency Response (at 1W) 20Hz – 20kHz, +0, –0.25dB
S/N Ratio (A-weighted at rated power ) 100dB
Damping Factor (8 ohms) 380
Power Bandwidth 1% THD 10Hz – 100kHz, +0, –3dB
Intermodulation Distortion 0.03%
Dimensions (H x W x D) 5-1/2" x 17-5/16" x 16-1/4" (140mm x 440mm x 413mm)
Net Weight 55.5 Ib (25.19kg)
Packaged Weight 65.5 Ib (29.73kg)
ll features and specifications are subject to change without notice.
A
11
JBL Consumer Products
A Harman International Company
A Harman International Company
A Harman International Company
250 Crossways Park Drive Woodbury, New York 11797 USA
www.jbl.com
2005 Harman International Industries,
© Incorporated. All rights reserved.
Part No. 34-JBL-0015 6/05
®
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