NHT A1 Owner's Manuals
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E v o l u t i o n
O w n e r ’ s
M a n u a l
&
S e t u p
G u i d e
O w n e r ’ s
M a n u a l
&
S e t u p
G u i d e

1. READ INSTRUCTIONS - All safety and operating instructions should be read before the appliance is operated.
2. RETAIN INSTRUCTIONS - Safety and operating instructions should be retained for future reference.
3. HEED WARNINGS - All warnings on the appliance and in operating instructions should be adhered to.
4. FOLLOW INSTRUCTIONS - All operating and use instructions should be followed.
5. WATER AND MOISTURE- The appliance should not be used near water - near bathtub, washbowl, kitchen sink, laundry tub; in a wet base-
ment near a swimming pool, etc.
6. CARTS AND STANDS - Do not place this product on an unstable cart, stand, tripod, bracket, or table. The appliance
should be used only with a cart or stand that is recommended by the manufacturer.
7. VENTILATION - The appliance should be situated so that its location and position do not interfere with proper ventila-
tion. The appliance should not be situated on a bed, sofa, rug, or any surface that may obstruct cabinet openings.
8. HEAT - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other
devices (including amplifiers) that produce heat.
9. POWER SOURCES - 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 power supply in your home, consult your product dealer or local power company. For products intended to oper-
ate from battery power or other sources, refer to the operating instructions.
10. POWER CORD PROTECTION - Power supply cords should be routed so that they are not likely to be walked upon or pinched by items
placed upon or against them, paying attention to cords and plugs, convenience receptacles, and the point where they exit from the appliance.
11. POLARIZED PLUG - This appliance is equipped with a polarized line plug (a plug having one blade wider than the other). This plug will fit
into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the
plug still fails to fit, contact your electrician to replace your obsolete outlet. Do not attempt to defeat this safety feature.
12. LIGHTNING - For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time,
unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the product due to lightning and power
line surges.
13. OVERLOADING - Do not overload wall outlets, extension cords, or integral convenience receptacles, as this can result in a risk of fire or
electric shock.
14. CLEANING - Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for
cleaning.
15. NON-USE PERIODS - This amplifier should be unplugged from the outlet when the appliance is left unused for a long period of time.
16. OBJECT AND LIQUID ENTRY - 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 this product.
17. DAMAGE REQUIRING SERVICE - The appliance should be serviced by qualified personnel when:
a. The power supply cord or plug has been damaged; or
b. Objects have fallen on or liquid has been spilled into the appliance; or
c. The appliance has been exposed to rain; or
d. The appliance does not appear to operate normally or exhibits a marked change in performance; or
e. The appliance has been dropped or the enclosure is damaged.
18. SERVICING - 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. For service warranty information call the NHT Hotline number: 1-800-NHT-9993.
19. REPLACEMENT PARTS - 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 substitution may result in fire, electric shock, or other
hazards.
20. SAFETY CHECK - Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to deter-
mine that the product is in proper operating condition.
IMPORTANT SAFETY INSTRUCTIONS
The lightning flash with the 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.
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 literature accompanying the appliance.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
THE APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH
AS VASES, SHALL BE PLACED ON THE APPARATUS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK). NO
USER SERVICEABLE PARTS INSIDE. REFER TO QUALIFIED SERVICE PERSONNEL.
CAUTION
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD, RECEP-
TACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
2. RETAIN INSTRUCTIONS - Safety and operating instructions should be retained for future reference.
3. HEED WARNINGS - All warnings on the appliance and in operating instructions should be adhered to.
4. FOLLOW INSTRUCTIONS - All operating and use instructions should be followed.
5. WATER AND MOISTURE- The appliance should not be used near water - near bathtub, washbowl, kitchen sink, laundry tub; in a wet base-
ment near a swimming pool, etc.
6. CARTS AND STANDS - Do not place this product on an unstable cart, stand, tripod, bracket, or table. The appliance
should be used only with a cart or stand that is recommended by the manufacturer.
7. VENTILATION - The appliance should be situated so that its location and position do not interfere with proper ventila-
tion. The appliance should not be situated on a bed, sofa, rug, or any surface that may obstruct cabinet openings.
8. HEAT - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other
devices (including amplifiers) that produce heat.
9. POWER SOURCES - 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 power supply in your home, consult your product dealer or local power company. For products intended to oper-
ate from battery power or other sources, refer to the operating instructions.
10. POWER CORD PROTECTION - Power supply cords should be routed so that they are not likely to be walked upon or pinched by items
placed upon or against them, paying attention to cords and plugs, convenience receptacles, and the point where they exit from the appliance.
11. POLARIZED PLUG - This appliance is equipped with a polarized line plug (a plug having one blade wider than the other). This plug will fit
into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the
plug still fails to fit, contact your electrician to replace your obsolete outlet. Do not attempt to defeat this safety feature.
12. LIGHTNING - For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time,
unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the product due to lightning and power
line surges.
13. OVERLOADING - Do not overload wall outlets, extension cords, or integral convenience receptacles, as this can result in a risk of fire or
electric shock.
14. CLEANING - Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for
cleaning.
15. NON-USE PERIODS - This amplifier should be unplugged from the outlet when the appliance is left unused for a long period of time.
16. OBJECT AND LIQUID ENTRY - 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 this product.
17. DAMAGE REQUIRING SERVICE - The appliance should be serviced by qualified personnel when:
a. The power supply cord or plug has been damaged; or
b. Objects have fallen on or liquid has been spilled into the appliance; or
c. The appliance has been exposed to rain; or
d. The appliance does not appear to operate normally or exhibits a marked change in performance; or
e. The appliance has been dropped or the enclosure is damaged.
18. SERVICING - 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. For service warranty information call the NHT Hotline number: 1-800-NHT-9993.
19. REPLACEMENT PARTS - 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 substitution may result in fire, electric shock, or other
hazards.
20. SAFETY CHECK - Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to deter-
mine that the product is in proper operating condition.
IMPORTANT SAFETY INSTRUCTIONS
The lightning flash with the 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.
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 literature accompanying the appliance.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
THE APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH
AS VASES, SHALL BE PLACED ON THE APPARATUS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK). NO
USER SERVICEABLE PARTS INSIDE. REFER TO QUALIFIED SERVICE PERSONNEL.
CAUTION
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD, RECEP-
TACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.

Evolution User Guide - Contents
1.0 Intro
1.1 Introduction, About This
Owner's Manual
1.2 Description By Model
1.3 Identifying Your System
2.0 Getting Organized
2.1 Unpacking
2.2 Parts List
3.0 Speaker Placement
3.1 Setting the Boundary Switch
3.2 2 Channel
3.3 5.1 Digital Surround Sound
3.4 Enhanced Digital Surround Formats
3.5 Center Channel
3.6 Subwoofers
3.7 Electronics
4.0 System Assembly
4.1 Supplies and Tools
4.2 Monitor Parts Assembly
4.3 T5 and T6 Tower Assembly
4.4 Assembling Monitors to Pedistals
5.0 Wiring Your Speakers
5.1 General Guides to Wire Layout
5.2 Speaker Phase
5.3 Connecting Speaker Wire
5.4 T5 and T6 Tower Wiring
5.5 Wiring For Monaural Bass
5.6 System Wiring Diagrams
6.0 Connecting Evolution Electronics to Your System
6.1 Signal Connections
6.2 Power Connections
7.0 Basic Settings for the X1 Active Crossover
8.0 X1 Bass Manager/ Active Crossover
8.1 Design
8.2 Placement
8.3 Explanation of Features
8.4 System Status Indicators
8.5 Fine Tuning
9.0 A1 Monaural Amplifier
9.1 Design
9.2 Placement
9.3 Rack Mounting the X1 and or A1
9.4 Power/Standby Mode
9.5 Courtesy Lights
9.6 System Status Indicators
9.7 Replacing the Fuse
9.8 Changing the Line Voltage Setting
10.0 Maintaining Your System
11.0 Evolution Technology
11.1 Monitor Technology
11.2 What is Virtual F.I.G.?
11.3 Boundary Switch
11.4 High Dynamic Range/Low Power
Compression
11.5 Orientation Independent Dispersion
12.0 Glossary of Terms
13.0 Trouble Shooting The A1 / X1
14.0 Specifications
1.0 Intro
1.1 Introduction, About This
Owner's Manual
1.2 Description By Model
1.3 Identifying Your System
2.0 Getting Organized
2.1 Unpacking
2.2 Parts List
3.0 Speaker Placement
3.1 Setting the Boundary Switch
3.2 2 Channel
3.3 5.1 Digital Surround Sound
3.4 Enhanced Digital Surround Formats
3.5 Center Channel
3.6 Subwoofers
3.7 Electronics
4.0 System Assembly
4.1 Supplies and Tools
4.2 Monitor Parts Assembly
4.3 T5 and T6 Tower Assembly
4.4 Assembling Monitors to Pedistals
5.0 Wiring Your Speakers
5.1 General Guides to Wire Layout
5.2 Speaker Phase
5.3 Connecting Speaker Wire
5.4 T5 and T6 Tower Wiring
5.5 Wiring For Monaural Bass
5.6 System Wiring Diagrams
6.0 Connecting Evolution Electronics to Your System
6.1 Signal Connections
6.2 Power Connections
7.0 Basic Settings for the X1 Active Crossover
8.0 X1 Bass Manager/ Active Crossover
8.1 Design
8.2 Placement
8.3 Explanation of Features
8.4 System Status Indicators
8.5 Fine Tuning
9.0 A1 Monaural Amplifier
9.1 Design
9.2 Placement
9.3 Rack Mounting the X1 and or A1
9.4 Power/Standby Mode
9.5 Courtesy Lights
9.6 System Status Indicators
9.7 Replacing the Fuse
9.8 Changing the Line Voltage Setting
10.0 Maintaining Your System
11.0 Evolution Technology
11.1 Monitor Technology
11.2 What is Virtual F.I.G.?
11.3 Boundary Switch
11.4 High Dynamic Range/Low Power
Compression
11.5 Orientation Independent Dispersion
12.0 Glossary of Terms
13.0 Trouble Shooting The A1 / X1
14.0 Specifications

1.1 Introduction, About this Owner's Manual
Congratulations on your purchase of an
Evolution System. We believe Evolution to be
the most flexible, high performance loudspeaker
collection available. Along with this manual, we
have included the following tools to assist you
with the setup of your Evolution system:
NHT Combination #2/#3 Phillips Screwdriver
NHT Binding Post Wrench with Bonus Bottle
Opener
Black Cotton Gloves
This Owner’s Manual will provide instructions for
initial assembly and connection of your system
and serve as an ongoing reference tool. The
assembly required is very simple and not time
consuming. The Manual is organized in logical
steps that will quickly take you from unpacking
to sitting back and enjoying the amazing sound
of Evolution.
If you require assistance at any time during the
assembly or installation of your Evolution sys-
tem, contact your authorized NHT dealer or call
our Customer Hotline at 1-800-NHT-9993 (648-
9993).
1.2 Description by Model
Monitors
M5 - Designed for small to
medium sized rooms. The
compact M5 is a 3-way,
acoustic suspension, magnetically shielded
monitor employing (2) 5.25" woofers, a 3"
midrange and a 1" aluminum dome tweeter.
M6 - Designed for medi-
um to large rooms. The
high output M6 is a 3-way,
acoustic suspension,
magnetically shielded monitor employing (2)
6.5" woofers, a 4" midrange and a 1" aluminum
dome tweeter.
Free Standing Subwoofers
W1 - The cabinet portion of
the U1 Powered Subwoofer
system. The W1 subwoofer
module employs dual, oppos-
ing 12" aluminum cone
woofers in a surprisingly compact enclosure.
W2 - The cabinet portion of
the U2 Powered
Subwoofer system. The
W2 subwoofer is only
available and used in
pairs. Each cabinet contains a 12" front firing,
aluminum cone woofer. This system is ideal for
in-cabinet or built in applications.
Tower Subwoofers
B5 - The B5 subwoofer bass mod-
ule, when mated with M5 Monitor,
Congratulations on your purchase of an
Evolution System. We believe Evolution to be
the most flexible, high performance loudspeaker
collection available. Along with this manual, we
have included the following tools to assist you
with the setup of your Evolution system:
NHT Combination #2/#3 Phillips Screwdriver
NHT Binding Post Wrench with Bonus Bottle
Opener
Black Cotton Gloves
This Owner’s Manual will provide instructions for
initial assembly and connection of your system
and serve as an ongoing reference tool. The
assembly required is very simple and not time
consuming. The Manual is organized in logical
steps that will quickly take you from unpacking
to sitting back and enjoying the amazing sound
of Evolution.
If you require assistance at any time during the
assembly or installation of your Evolution sys-
tem, contact your authorized NHT dealer or call
our Customer Hotline at 1-800-NHT-9993 (648-
9993).
1.2 Description by Model
Monitors
M5 - Designed for small to
medium sized rooms. The
compact M5 is a 3-way,
acoustic suspension, magnetically shielded
monitor employing (2) 5.25" woofers, a 3"
midrange and a 1" aluminum dome tweeter.
M6 - Designed for medi-
um to large rooms. The
high output M6 is a 3-way,
acoustic suspension,
magnetically shielded monitor employing (2)
6.5" woofers, a 4" midrange and a 1" aluminum
dome tweeter.
Free Standing Subwoofers
W1 - The cabinet portion of
the U1 Powered Subwoofer
system. The W1 subwoofer
module employs dual, oppos-
ing 12" aluminum cone
woofers in a surprisingly compact enclosure.
W2 - The cabinet portion of
the U2 Powered
Subwoofer system. The
W2 subwoofer is only
available and used in
pairs. Each cabinet contains a 12" front firing,
aluminum cone woofer. This system is ideal for
in-cabinet or built in applications.
Tower Subwoofers
B5 - The B5 subwoofer bass mod-
ule, when mated with M5 Monitor,




















































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