US Amps AX Owner's Manual

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US Amps AX Owner's Manual | Manualzz

www.usamps.com

AX

series

Copyright 2007 U.S.Amps. All rights reserved.

1

Thank you for choosing U.S.Amps! You have purchased the finest product of its type available. Each product is tested and built in our California factory. You won’t just listen to your U.S.Amp; you’ll experience it. When properly installed, this unit will provide years of trouble-free service.

This manual is written for the experienced installer. Please read it ALL before installa-

tion! You may need to make changes in your installation to properly connect and operate this fine product.

If you are unfamiliar with the terminology and concepts within, we strongly recommend you seek the assistance of an Authorized U.S.Amps Dealer or other car audio professional.

Authorized Dealers can be located on the U.S.Amps' web site: www.usamps.com. We can be reached by e-mail at [email protected], but please be patient with us and give us a few days to respond. Remember, protect your hearing and enjoy your U.S.Amps!

Table of Contents

Thanks, Caution, and Contacts

Table of Contents

Did You Buy the Right U.S.Amp?

Installation

WARNING

Amplifier Mounting

Ventilation

Amplifier and Crossover Input

Signal Level Input

Gain Control Adjustment

Batteries

Getting Wired

Amplifier Controls & Features

AX-TU600C

AX-1000/2000

AX-TU4360C

AX-5600

1

1

2

6

7

4

5

3

3

2

2

2

2

2

2

AX-600DE/3200DE

Wiring Instructions

AX-TU600C/1000/2000

AX-TU4360C

AX-5600

AX-600DE

AX-3200DE

Power & Fuse Chart

Specifications

Why Tubes?

VTCSD

Benefits of Class “DE”

Note

Never, Never, Never!

Warranty

8

16

17

18

BACK

BACK

13

14

15

16

9

10

11

12

D

Did You Buy the Right U.S.Amp?

There is a U.S.Amp for every purpose! From raw power to exquisite sound quality and everything in between, U.S.Amps offers state-of-the-art technology to meet your every need.

INSTALLATION

Amplifier Mounting:

Choose an appropriate location to mount the amplifier(s). Make sure your choice is free from excess heat, moisture, and vibration. Under the vehicle seat or in the trunk are common mounting locations. Be sure the amplifier receives adequate ventilation to its heat sink and is positioned away from flying luggage and people’s feet. Do not mount to the speaker enclosures.

Ventilation:

It is important to provide the amplifier with adequate ventilation to remove heat from the amplifier heat sink. During high performance applications, in which the amplifier may be exposed to extremely low impedance loads, it may be necessary to provide external ventilation via a fan or some other means. With proper ventilation, the "run time" of the amplifier between thermal protection cycles can be greatly extended.

IMPORTANT NOTICE

The Input of a U.S.Amp MUST be GROUNDED for proper amplifier operation.

The use of external ground isolation dividing devices is UNNECESSARY

and may cause severe amplifier and/or system damage.

Amplifier Input:

U.S.Amps feature a unique isolated input section that will accept signal voltages from 1 to 9 volts. The input section also provides amplifier ground isolation for the prevention of system and engine noise. The unique configuration of the U.S.Amps input necessitates a correct input ground, and is not compatible with external ground isolation devices.

Signal Level (BTL) Input:

This product will accept line and signal level, and can be used with most BTL "high powered" sources. To use a BTL source, observe the following:

1) BTL outputs have two "hot" non-grounded leads per channel. Select ONE per channel, and connect it to the “center conductor” of the RCA input cables going to the amplifier input.

2) Insulate and disregard the second wire of each BTL output pair.

3) Ground the shield wires of the RCA cable to the metal body of the source unit.

Gain Control Adjustment:

Always start with the gain control fully counter-clockwise

(all the way down), or just slightly open. Adjust the source unit volume as high as possible without distortion. Increase the amplifier gain until the amplifier distorts, then turn the gain down slightly until the signal becomes clear. It is desirable to operate the amp at the lowest possible gain setting to help reject spurious system noise.

2

CARE AND FEEDING OF YOUR BATTERIES

As mentioned before, most batteries are built for the relatively light chore of starting the engine. Unless you have the room and ambition to install an upgraded high-powered alternator, your system current requirements may exceed the charging capability of your car’s electrical system. When this happens, you have to rely on the vehicle battery(s) to make up the difference. Another factor to consider is voltage. Although the electrical system is considered to be “12 volt”, the battery, when healthy, actually “rests” at 12.6 volts. The average alternator

“puts out” 14.4 volts when the engine is on, because it is necessary to “feed” a battery higher voltage in order for it to charge.

GETTING WIRED:

Once you have established the current needs of your system, it will be of the UTMOST

IMPORTANCE to properly fuse the amplifier. Remember, power connections are always the last thing. There cannot be enough emphasis placed on the importance of proper fusing. Fuses prevent catastrophes. Always fuse each U.S.Amp product at or less than the recom-

mended amperage. Another major consideration is wire. If you wish to build a truly highpowered system, you must take into account the total amperage requirements of the system and select your wire gauge accordingly. The following chart can be used as a guide:

3

WIRE GAUGE and AMPERAGE Guide:

AWG 14

AWG 13

AWG 10

AWG 8

30 Amps

35 Amps

45 Amps

60 Amps

AWG 6

AWG 4

AWG 2

AWG 1

80 Amps

105 Amps

135 Amps

160 Amps

AWG 0

AWG 00

AWG 000

AWG 0000

190 Amps

215 Amps

245 Amps

275 Amps

These are real numbers, right out of the 1951 U.S.Federal Electronics Code Book.

It takes real wire to do real work.

For each 100 watts, when playing music, count on 10 amps average of average current draw.

AX-TU600C

2-Channel Amplifiers

Controls and Features

1 2 3 4 5 6 7 8

L

R

In Out

Off On HP

Full

Min

INPUT

Gain

50 500

SUB

Freq RBG

SUB

XOver

AX-TU600C

“VTCSD” Technology

LP

Subsonic

Filter

HP

Freq

Pwr Prot

U.S.A.

1 Amplifier Input The amplifier MUST receive input on BOTH RCA jacks for proper operation.

2 Amplifier Output The low level output can be connected to other amplifiers.

3 Input Gain is variable from 1 to 9 volts for full output. Best results are achieved by

adjusting the control to the lowest setting in relation to the output of the source unit.

4 Low-pass Crossover Control

For the internal amplifier, adjustable from 50 Hz to 500 Hz @ 24dB.

5 Remote Bass Gain A phone jack that accepts the included RBG control harness to allow the amplifier volume to be controlled from the passenger compartment.

6 Low-pass Crossover 3-way Switch

A 3-way switch which selects the full-range/high-pass/low-pass crossover feature.

7 Subsonic Filter To optimize amplifier power in the audible frequencies, a defeatable

36 Hz subsonic filter provides a 6 dB per octave roll-off.

8 High-pass Crossover Control

For the internal amplifier, adjustable from 50 Hz to 500 Hz @ 12dB.

WARNING: All U.S.Amps require a grounded input connection.

DO NOT use ground-loop isolation devices or high/low conversion devices on the input of your U.S.Amp!

4

AX-1000/2000

2-Channel Amplifiers

Controls and Features

5

1 2 3 4 5 6 7

L

R

In

Off On Off On

Out

Min

INPUT

Gain

AX-

50 500

SUB

Freq RBG

000

Two Ohm Stable Design

SUB

XOver

Subsonic

Filter

U.S.A.

Pwr Prot

(Shown here is AX-1000, but the diagram is also applicable to AX-2000.)

1 Amplifier Input The amplifier MUST receive input on BOTH RCA jacks for proper operation.

2 Amplifier Output The low level output can be connected to other amplifiers.

3 Input Gain is variable from 1 to 9 volts for full output. Best results are achieved by

adjusting the control to the lowest setting in relation to the output of the source unit.

4 Low-pass Crossover Control

For the internal amplifier, adjustable from 50 Hz to 500 Hz @ 24dB.

5 Remote Bass Gain A phone jack that accepts the included RBG control harness to allow the amplifier volume to be controlled from the passenger compartment.

6 Low-pass Crossover On/Off Switch

A 2-way switch which enables/disables the low-pass crossover feature.

7 Subsonic Filter To optimize amplifier power in the audible frequencies, a defeatable

36 Hz subsonic filter provides a 6 dB per octave roll-off.

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

+ + +

+ + +

+

AX-TU4360C

4-Channel Amplifiers

Controls and Features

The AX-4360C features a selectable two-way electronic crossover with independent front and rear mid-high frequency adjustment and 2 ohm per channel stability. Power is provided by four 75 watt channels that can be bridged as front and rear pairs into a 4 ohm load for a total of 180 watts per bridged pair.

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

1 2 3 4 5

Front

Freq

Rear

Freq

SUB

Freq

L

Max Max 50 500 50 500 50 500

R

Front

Input

Rear

Input

Four Channel Amplifier

RBG

LP HP Full

Front

LP HP Full

Pwr Prot

Rear

U.S.A.

1 Amplifier Input The amplifier MUST receive input on BOTH RCA jacks for proper operation.

2 Input Gain is variable from 1 to 9 volts for full output. Best results are achieved by

adjusting the control to the lowest setting in relation to the output of the source unit.

3 Low-pass Crossover Control

For the internal amplifier, adjustable from 50 Hz to 500 Hz @ 24dB.

4 Remote Bass Gain A phone jack that accepts the included RBG control harness to allow the amplifier volume to be controlled from the passenger compartment.

5 Low-pass Crossover 3-way Switch

A 3-way switch which selects the full-range/high-pass/low-pass crossover feature.

6

AX-5600

5-Channel Amplifier

Controls and Features

The 5-channel AX-5600 features a selectable 3-way electronic crossover with independent front and rear mid-high frequency adjustment, dual power supplies, 2 ohm per channel stability, and a Remote Bass Gain.

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

1

Sub

Gain

Sub

XOver

Band

Pass

L

R

SUB Input

Min 50 500 200 5K

Rear LP

XOver RBG

AX-5600

Five Channel Amplifier

DE Sub Channel

Rear

HP

50 500

Rear HP

XOver

Rear

Gain

Max

U.S.A.

50 500

Front HP

XOver

Front

Gain

Max

L

Rear

Input

Front

Input

Pwr

R

2

1 Remote Bass Gain The AX-5600 comes with an optional “Remote Bass Gain” or “RBG” that can be mounted in the passenger compartment to independently attenuate the low pass output.

The “BASS GAIN” located on the terminal endplate of the unit is used both to set the level at the low pass output and control the range of the RBG.

2 3-WAY Input allows the AX-5600 to accept input from modern 3-way head-units allowing front to-rear fading of the mid-highs and Independent frequency and volume adjustment from the passenger compartment.

Protection AX-5600 is protected against thermal, over and under voltage and short circuit. The separate power supplies of AX-5600 are individually protected against over-current.

2 Ohm Stability

All 5 channels of the AX-5600 are stable to 2 ohms. The power of the mid-high channels increase 17% from 4 to 2 ohms while the subwoofer channel increases a whopping 43%!

Amp Power @ 4 Ohms

75 W X 4 + 500 W X 1 @ 1Ω

Amp Power @ 2 Ohms

90 W X 4 + 500 W X 1 @ 1Ω

800

Total Watts

860

Total Watts

7

+ + +

+ + +

+

+ + +

+ + +

+ + +

+

+

AX-600DE/3200DE

Class “DE” Amplifiers

Controls and Features

1 2 3 4 5

INPUT

L

R

PWR Prot

Min

INPUT

Gain

50 500

SUB

Freq RBG

AX-600DE

One Ohm Stable Design

Subsonic

Slave

XOver

Class DE Digital Amplifier

U.S.A.

1200 Watts Dynamic Power

600 Watts RMS Power

(Shown here is AX-600DE, but the diagram is also applicable to AX-3200DE.)

1 Amplifier Input The amplifier MUST receive input on BOTH RCA jacks for proper operation.

2 Input Gain is variable from 150 mV to 3 volts for full output. Best results are achieved by adjusting the control to the lowest setting in relation to the output of the source unit.

3 Low-pass Crossover Control

For the internal amplifier, adjustable from 50 Hz to 500 Hz @ 24dB.

4 Remote Bass Gain A two-position removable plug that accepts the included RBG control harness to allow the amplifier volume to be controlled from the passenger compartment.

5 The Magic Switch

The far left "Subsonic Filter" position makes more efficient use of amplifier power by discarding frequencies below 36Hz.

The center "XOver" defeats the Subsonic Filter tor amplifier operation down to 5 Hz.

The far right "Slave" position defeats all amplifier controls to receive information through the Remote

Bass Gain wires from another "master" amplifier.

This can be repeated as often as necessary with all slave units receiving Identical gain, frequency, and subsonic functions from the master amplifier.

A single Remote Bass Gain can be connected at any point to universally control the volume of the entire amplifier bank.

WARNING: All U.S.Amps require a grounded input connection.

DO NOT use ground-loop isolation devices or high/low conversion devices on the input of your U.S.Amp!

8

9

Wiring Instructions for AX-TU600C/1000/2000

Power Output

AX-TU600C

165W X 2 @ 4Ω

300W X 2 @ 2Ω

AX-1000

300W X 2 @ 4Ω

500W X 2 @ 2Ω

AX-2000

600W X 2 @ 4Ω

1000W X 2 @ 2Ω

+

+

+ + +

+

Source Unit

+

Positive 12V Remote Turn-on

REM

12V

POS

GND

+ + +

Fuse Rating

AX-TU600C:

AX-1000:

AX-2000:

60A

100A

200A

Bridged Output

AX-TU600C

600W X 1 @ 4Ω

AX-1000

1000W X 1 @ 4Ω

AX-2000

2000W X 1 @ 4Ω

F

U

S

E

Negative 12V to Vehicle Ground

(Use minimum 8-gauge Wire)

+ −

Vehicle Battery

11 to 15 volts DC Vehicle Ground

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

+ + +

+ + +

+ + +

+

+

+ + +

+ + +

+

+

+ + +

+ + +

+

Source Unit

Wiring Instructions for AX-TU4360C

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

Positive 12V Remote Turn-on

REM

12V

POS

GND

+ + +

+

Front Left

Speaker

Front Right

Speaker

+

Positive 12V to Vehicle Battery

(Use minimum

8-gauge Wire)

Negative 12V to Vehicle Ground

(Use minimum

8-gauge Wire)

F

U

S

E

60A

+ −

Vehicle Battery

11 to 15 volts DC

+ + +

+ + +

+

+

+

Rear Left

Speaker

Rear Right

Speaker

[4 channel Operation]

+

Power Output

75W X 4 @ 4Ω

90W X 4 @ 2Ω

Vehicle Ground

+

Left

Speaker

+ + +

+ + +

+

+

+

Right

Speaker

Bridged Output

180W X 2 @ 4Ω

[2 channel Operation]

DO NOT OPERATE AX-4360C BRIDGED MONO

AT LESS THAN 4Ω PER BRIDGED CHANNEL

10

11

Wiring Instructions for AX-5600

Source Unit

Positive 12V Remote Turn-on

REM

12V

POS

GND

+ + +

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

Front Left

Speaker

+

Front Right

Speaker

+

Positive 12V to Vehicle Battery

(Use minimum

8-gauge Wire)

Negative 12V to Vehicle Ground

(Use minimum

8-gauge Wire)

F

U

S

E

75A

+ + +

+ + +

+

+

Power Output

75W X 4 @ 4Ω

90W X 4 @ 2Ω

+

+ −

Vehicle Battery

11 to 15 volts DC

Vehicle Ground

+

Rear Left

Speaker

Rear Right

Speaker

+

(Note: The front and rear channels of the AX-5600)

Sub Woofer Output

500W X 1 @ 1Ω

AX-600DE

Wiring Instructions for AX-600DE

SPECIAL NOTE:

Class “DE” amplifiers are single-ended mono designs, and are not bridgeable. BE SURE the TOTAL LOAD of

ALL connected speakers does not fall beneath 1Ω.

Choose one of three possible connections shown below.

+

1 2

+

Source Unit

Positive 12V Remote Turn-on

Power Output

AX-600DE

250W X 1 @ 4Ω

400W X 1 @ 2Ω

600W X 1 @ 1Ω

+ + +

+

3

12V

POS

REM GND

+ + +

+

F

U

S

E

50A

Negative 12V to Vehicle Ground

(Use minimum 8-gauge Wire)

+ −

Vehicle Battery

11 to 15 volts DC

Vehicle Ground

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

12

Wiring Instructions for AX-3200DE

SPECIAL NOTE:

Class “DE” amplifiers are single-ended mono designs, and are not bridgeable. BE SURE the TOTAL LOAD of

ALL connected speakers does not fall beneath 1Ω.

13

WARNING: NEVER use ground-loop isolation on the input of your U.S.Amp! It doesn’t need it!

Source Unit

Positive 12V Remote Turn-on

REM

12V

POS

GND

+ + +

F

U

S

E

Negative 12V to Vehicle Ground

(Use minimum 8-gauge Wire)

+ + +

+

Power Output

1200W X 1 @ 4Ω

2500W X 1 @ 2Ω

3000W X 1 @ 1Ω

+

+ −

Vehicle Battery

11 to 15 volts DC Vehicle Ground

AX-TU4360C

AX-1000

MODEL

U.S.Amps Amplifier Power & Fuse

4 Ω

Watts per Channel*

2 Ω 1 Ω FUSE

AX-1000 300W X 2 500W X 2 N/A 100A

AX-2000 600W X 2 1000W X 2 N/A 200A

AX-5600 75W X 4 90W X 4 500W X 1(Sub) 75A

AX-600DE 250W X 1 400W X 1 600W X 1

AX-3200DE 1200W X 1 2000W X 1 3000W X 1

AX-TU600C 165W X 2

AX-TU4360C 75W X 4

300W X 2

90W X 4

AX-2000HC 150W X 2 300W X 2

N/A

N/A

N/A

Copyright 2007 U.S.Amps. All rights reserved.

*Specifications are subject to change without notice

50A

300A

60A

60A

200A

14

15

U.S.Amps Amplifier Specification

MODEL

Bridged

Output

THD

@ 4Ω

S/N

Ratio

Damping

Factor**

Slew

Rate

AX-1000 1000W X 1 @ 4Ω <0.025% >95 dB >600 150 Vus

AX-2000 2000W X 1 @ 4Ω <0.025% >95 dB >1000 150 Vus

AX-5600 N/A <0.025% >95 dB >200 150 Vus

AX-600DE

AX-3200DE

Mono

Mono

<0.1% >86 dB >250 N/A

<0.1% >86 dB >250 N/A

AX-TU600C 600W X 1 @ 4Ω <0.05% >95 dB >600 150 Vus

AX-TU4360C 180W X 2 @ 4Ω <0.05% >95 dB >200 150 Vus

AX-2000HC

600W X 1 @ 4Ω

2000W X 1 @ 1Ω

<0.025% >95 dB >1000 150 Vus

Copyright 2007 U.S.Amps. All rights reserved. *Specifications are subject to change without notice.

**Measured at 4Ω/14.4V at the circuit board.

AX-TU600C

Why Tubes?

You may know that a transistor is a modern, efficient, less expensive version of a vacuum tube, which is the device that made sound recording and reproduction possible in the first place. Now, the electronics industry has been trying for many years to equal the sound quality available from tubes. They have been able to make transistor amps louder, cooler, more abusable, and less expensive than tubes, but to this day, they’ve been unable to make any solid state amp sound as good as a tube amp.

So, our engineer got to wondering, “What if I combined the sonic character of a vacuum tube with the drive capabilities of solid state?”

Well, the result is the U.S.Amps’ VTCSD hybrid amps. Using the signal path directly out of the tubes as a “steering” signal and the following drive signal wave from the transistors as the “motor,” with absolutely no negative feedback as a corrective to the transistor’s waveform, we achieved the most detailed, pleasing, articulated sound available in mobile audio today.

Tube In, Tube Out

VTCSD

(Vacuum Tube Current Sync Drive)

Hybrid Tube/Transistor Amps

Uneven Clipping

Odd-order Harmonics Solid State Amplifier

Preamp Signal

Solid State Input

Low Voltage

Low Current

Smooth, Low

Tube Voltage Negative Feedback

Transistor Switching

Noise

Listening Fatigue

Compression and Coloration

Classic Vacuum Tube Amps w/Output Transformer

Tube Input

Low Voltage

Low Current

High Voltage/Low Current

Signal from Output Tube is fed into Output

Transformer

Output

Transformer converts

Voltage

Energy into

Current

The resultant signal is soothing and pleasing

Yet lacks much of the tubes’ original dynamic range

Vacuum Tube Current Sync Drive

Positive Current Sync

Direct Input

Input signal is fed

DIRECTLY into the tube.

There are no solid state gain stages or processors in the signal path.

Negative Current Sync

The original high voltage tube signal is joined by a null-gain current following circuit that is pulled to the voltage rails by an opposing pair of current syncs, providing a sort of amplifier

“power steering” to deliver speaker-driving power without taxing the character of the original tube voltage content.

16

VTCSD

(continued)

VTCSD “follows” the high voltage tube signal STRAIGHT INTO THE SPEAKERS, adding only current in a form of “amplifier power steering” — free from voltage gain or negative amplifier feedback!

Vaccum tubes are renowned for their high dynamic range and smooth emphasis of even-order harmonics. The transformer-less VTCSD circuit brings out hidden qualities of the vacuum tubes, including excellent frequency response, smooth

“clipping” and high signal-to-noise ratio.

VTCSD divides audio signal amplification in two separate areas, voltage and current. By starting with the vacuum tube as a source of high voltage(vacuum tubes operate at four times the voltage of transistors), VTCSD adds a second solid-state “amperage amplifier.” The “amperage amplifier” is a null-gain circuit driven by “current syncs” that mirror the voltage signal and provide “torque” to the speakers in perfect synchronization with the voltage content, that neither distorts or colors the original tube sound!

The result are astonishing. All of the intensity, transience, and frequency response of the vacuum tube, which can operate at MUCH higher output voltage than audio transistors.

17

Benefis of Class “DE”

DE

U.S.Amps continues to push the technological envelope with the introduction of two new digital models that combine the attributes of “D” lass amplifiers with the versatility and practical fidelity usualyy expericenced only with standard Class “AB” designs. Thsi bold leap forward in digital technology allows for 90% effieciency under extreme dircumstances that turn other digital amplifiers to toast. As cars become more and more energy efficient and provide less available battery power, Class “DE” represents the best power output-to-current consumption available on the market today!

• Combines class “D” attributes with the versatility and practical fidelity of class “AB” designs

• Allows for 90% efficiency under extreme circumstances that turn other digital amplifiers to toast

• Represents the best power output-to-current consumption

NOTE

18

NEVER, NEVER, NEVER!

NEVER USE A U.S.AMP WITH A GROUND LOOP ISOLATOR ON THE RCA’S OR AN ISOLATED

INPUT SIGNAL. U.S.Amps are input-isolated at the factory and require an input ground for proper operation.

NEVER INSTALL OR MOUNT YOUR AMPLIFIER DIRECTLY TO A SPEAKER ENCLOSURE OR

ANYWHERE ELSE WHERE SEVERE VIBRATION IS PRESENT. Protect your investment. Use Common sense. Make sure the spot you choose is well-ventilated and free from dirt and moisture.

NEVER USE YOUR U.S.AMP BELOW THE RATED MINIMUM IMPEDANCE. Remember, when you bridge your amplifier, each channel “sees” one half of the load, hence at 4 ohms bridged each channel is operating at 2 ohms.

U.S.Amps makes the FAILURE TO OBSERVE THIS BASIC RULE WILL RESULT IN A SENSELESS WASTE OF POWER AND

PERFORMANCE, and could damage your amplifier.

Limited Warranty:

U.S.Amps warrants all manufactured electronic products to be free from defects in material and workmanship for a period not to exceed TWO YEARS from the date of purchase.

IMPORTANT WARRANTY NOTICE: U.S.Amps will only warrant and service products displaying valid U.S.Amps serial numbers. WARRANTY SERVICE WILL ONLY BE

PERFORMED WHEN THE UNIT IS ACCOMPANIED BY A COPY OF THE ORIGINAL SALES

RECEIPT FROM AN AUTHORIZED DEALER. All product returned to U.S.Amps for service

MUST be accompanied by a Return Authorization Number, issued by U.S.Amps in advance of shipment. The Return Authorization Number must be clearly and conspicuously displayed on the shipping carton or U.S.Amps will refuse delivery.

For Return Authorization Numbers, first call your U.S.Amps dealer you purchased the products from. The dealer will help you to obtain Return Authorization Numbers.

This warranty extends only to the original purchaser and is not transferable. Defective equipment must be returned within the warranty period, freight prepaid, to the U.S.Amps Factory or an Authorized U.S.Amps Warranty Station.

This warranty covers only detects in materials and workmanship of manufactured electronic products(amplifiers).

Incidents of misuse, abuse, neglect, or unauthorized modification will not be covered within the terms of this warranty.

U.S.Amps reserves the right to refuse warranty service under such conditions.

U.S.AMPS WILL NOT BE RESPONSIBLE FOR ANY DAMAGES, WHETHER INCIDENTAL OR

CONSEQUENTIAL, RELATED TO THE USE OF THIS OR ANY OTHER PRODUCT BEARING OR

SOLD UNDER THE U.S.AMPS BRAND NAME. USE THIS PRODUCT AT YOUR OWN RISK.

IMPROPER USE OF THIS PRODUCT CAN RESULT IN PROPERTY DAMAGE, BODILY HARM,

AND OR OTHER DAMAGE. U.S.AMPS ASSUMES NO RESPONSIBILITY FOR YOUR HEALTH

OR SAFETY.

www.usamps.com

AX series

Owners Manual and

Installation

Guide

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