U.S. Amps Bass Mekanik Programming manual

HAND - CRAFTED IN FLORIDA, U. S. A.
Owners’ Manual
and Installation Guide
T-CLASS digital amplifiers
INCLUDING
BASS MEKANIK

Did you buy the right U.S. Amp?
There is a U.S. Amp for every purpose. If your needs require maximum amplifier power into 4 or 2
ohms per channel, or 4 ohms bridged, use one of the Xterminator “X” models for the best results.
If you have more than a pair of speakers, or if the speakers have multiple voice coils, you may need
the extra current and low impedance stability of the USA Series. The USA Series develops
maximum output when used at 1 ohm per channel or 2 ohms bridged.
If you participate in sound-off events, the “HC” (High Current) amplifiers are designed to operate at
ultra-low impedances.
Installation: 3
Active Electronic Crossovers: 4,5
Bridging Your U.S. Amp- 6,7
Getting Wired- 8
Batteries- 8,9
Amplifier Protection- 9
Amplifier Specifications- 10,11
USA-200 / 200X, USA-400 / 400X- 12.13
USA-50HC, USA-100HC,
USA-600 / 600X,
USA-1000 / 1000X- 14,15
USA-2000 / 2000X- 16
USA-4300X- 17,18
USA-5600X- 19,20
Factory Warranty Service- 26
Limited Warranty- 26
Never-Never Land- 27
Other Cool Stuff- 27,28
Table of Contents:
BASS MEKANIK
T-Class
Explained- 21-23
PT-35o- 24
PT-8oo, pt-11oo- 25
Thank-you for choosing U.S. Amps! You have purchased the finest product of its type
available. Each U.S. Amp is built in our Gainesville, Florida factory. Nothing is
done "off shore" or across the border. You won't just to your U.S. Amp, you will
it. When properly installed, this unit will provide years of trouble-free service..
by hand
listen
experience
This manual is written for the experienced installer. Please read it in its entirety
. 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 website: ,
or by calling the U.S. Amps Factory - Monday thru Friday at (352)-338-1926, 9am to 5pm EST.
Our 24 FAX line is (352)-371-4122. Remember, and enjoy your U.S. Amp!
before
installation
protect your hearing
www.usamps.com
2

INSTALLATION
Amplifier Mounting:
Ventilation:
Amplifier and Crossover Input:
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 the amplifier directly to speaker
enclosures.
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 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.
U.S. Amps feature a unique isolated input section that will accept signal voltages from 250 mv to
10 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:
Gain Control Adjustment:
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.
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.
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.
3

US-X2
US-X2
ACTIVE ELECTRONIC CROSSOVER
MODEL US-X2
MADE IN
FLORIDA,
U. S. A.
FREQUENCY
OUTPUTGAIN
BASS BOOST
LOW
HIGH
INPUT
LOWPASS
LEFT
LEFT
LEFT
RIGHT
RIGHT
RIGHT
HIGHPASS
AMPREMOTE
REMOTE
GROUND
POWER
US - X2R
US - X2R
o
POWER
LOW PASS FREQUENCY
REAR HIGH FREQUENCY
FRONT HIGH FREQUENCY
BASS BOOST
REAR GAIN
FRONT GAIN
INPUT
BASS
GAIN
DUAL (FADE)
SINGLE
MODEL US-X2R
Active Electronic Crossover
MIFADE N LORIDA,
U. S. A.
MIFADE N LORIDA,
U. S. A.
!
GROUND
GROUND
To the Vehicle
Chassis
POWER
POWER Fuse
at 3 Amps
REMOTE
REMOTE Positive 12
Volt Trigger From Source
REMOTE BASS GAIN
AMP REMOTE
AMP REMOTE Positive 12
Volt Trigger to Amplifiers
REMOTE
BASS GAIN
Install in
Vehicle
Passenger
Compartment
LOW PASS OUTPUT
REAR HIGH PASS OUTPUT FRONT HIGH PASS OUTPUT
REAR INPUT
FRONT INPUT
HAND-CRAFTEDINFLORIDA,U.S.A.HAND-CRAFTED IN FLORIDA, U. S. A. HAND-CRAFTEDINFLORIDA,U.S.A.HAND-CRAFTED IN FLORIDA, U. S. A. HAND-CRAFTEDINFLORIDA,U.S.A.HAND-CRAFTED IN FLORIDA, U. S. A.
LOW PASS
OUTPUT
Adjustable
0-9 Volts,
50-500Hz
LOW PASS (Bass)
GAIN:
Sets the level of
low pass ouput and
regulates the range of
the Remote Bass Gain
SINGLE / DUAL INPUT
SWITCH:
US-X2R will
accept input from dual
RCA pairs to “fade”
(as shown) Mid / High
levels from front to rear
REAR MID / HI
OUTPUT
Adjustable
0-9 Volts,
50-500Hz
FRONT MID / HI
OUTPUT
Adjustable
0-9 Volts,
50-500Hz
Source Unit
Front Mid / High
Rear Mid /High
Low Pass
Crossover
frequency
adjustments
Front Mid / High
Input Gain
REAR Mid / High
Input Gain
Variable Bass Boost
65Hz - 0 to 20Db
Power LED
ACTIVE ELECTRONIC CROSSOVERS
The US-X2 and US-X2R are two-way crossovers that “split” the full-range
audio signal into two groups of frequencies- high and low. Each group is
sent to a dedicated amplifier, which in turn, powers a speaker or speakers
that are best suited to play those frequencies.
Both units have independent controls to adjust the “roll-off” of the high and
low frequencies from 50Hz to 500Hz at 12 Db per octave.
The US-X2R 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
cut-away side of the unit is
used both to set the level of
the low pass output and
control the range of the
RBG. It does not matter
which way
The low frequency control limits the high frequency response of the low pass output, and the high
frequency control limits the low frequency response of the high pass output. Both units feature a variable
Bass Boost that emphasizes frequencies in the 65Hz range up to 20Db. The US-X2R is a more featured
unit with dual inputs and high pass outputs that can be independently adjusted. The US-X2R will “fade”
between two mid and high amps, but if only one input pair is available, the dual input can be defeated.
two
4

U.S. Amps crossovers feature an isolated input and amplifier section to keep the system free of
noise. It is important to ground the crossover input for proper operation. Do not use a floating
ground isolator with this or any other U.S. Amps product.
the RBG cable is connected. Use a common screwdriver tip or something like it to tighten the RBG knob.
The US-X3 is a three-way unit that further divides the frequencies for three amplifiers. The features and
operation are similar to the others with the addition of the third mid range channel, and its gain. There are
separate high, mid and low mid frequency controls, and the mid range output can be inverted 180 degrees
with a switch to correct for real-life speaker placement.
US-X3
US-X3
o
POWER
LOWPASS
FREQUENCY
HIGHMID
FREQUENCY
LOWMID
FREQUENCY
HIGHPASS
FREQUENCY
BASS BOOST
LOWGAIN
MID GAIN
HIGHGAIN
GROUND
POWER
REMOTE
AMPREMOTE
LOW
OUTPUT
MID
OUTPUT
HIGH
OUTPUT
LOWPASS
INPUT
MAIN
INPUT
o
MIFADE N LORIDA, U. S. A. MIFADE N LORIDA, U. S. A.
MODEL US-X3
HAND-CRAFTEDIN FLORIDA,U.S.A. HAND-CRAFTED IN FLORIDA, U. S. A. HAND-CRAFTEDIN FLORIDA,U.S.A. HAND-CRAFTED IN FLORIDA, U. S. A. HAND-CRAFTEDIN FLORIDA,U.S.A. HAND-CRAFTED IN FLORIDA, U. S. A.
GROUND
To the Vehicle
Chassis
POWER Fuse
at 3 Amps
REMOTE Positive 12
Volt Trigger From Source
AMP REMOTE Positive 12
Volt Trigger to Amplifiers
POWER
LED
HIGH
OUTPUT
0-9 Volts
LOW
OUTPUT
0-9 Volts
MID
OUTPUT
0-9 Volts
BASS
BOOST
0 - 20Db
LOW PASS FADER
Can be activated or
defeated with this switch
2-WAY / 3-WAY OPERATION
When used in the 2-Way mode
both the High and Mid Outputs
have Mid / High Output signals
adjustable from 50-500Hz via
the Low Mid Frequency Control
MIDRANGE PHASE INVERSION
Inverts the Midrange Output
phase 180 degrees to correct
for off-axis frequency response
FREQUENCY
ADJUSTMENTS:
LOW PASS: HIGH MID: LOW MID: HIGH PASS:50Hz-500Hz 500Hz-5KHz 50Hz-500Hz 500Hz-5Khz
Source Unit
LOW PASS
OUTPUT
Adjustable
0-9 Volts,
50-500Hz
MID RANGE
OUTPUT
Adjustable
0-9 Volts,
50-500Hz
Low Mid
500-5KHz
High Mid
HIGH PASS
OUTPUT
Adjustable
0-9 Volts,
500-5KHz
LOW PASS
FADER
MODE
PHASE
ON
OFF
2-WAY
3-WAY
0
180
SUBS MID-BASS/
MIDS
TWEETS
5

BRIDGING YOUR U.S. AMP
All U.S. Amps listed in the following section can be used in the BRIDGED mode, meaning that both
channels of the amplifier are used together as a powerful single channel, usually to drive a group of
subwoofers. Since subwoofers come in a wide variety of types and impedances, U.S. Amps
makes different groups of amplifier models to work best with specific speaker systems. To get the
most power from your amp, match it by model and code to one of the following diagrams. Great
care has been taken to optimize your amplifier’s performance when wired as recommended, so
please follow these diagrams carefully. The on-board SAT “SMART AMP TECHNOLOGY”
protection circuit on the USA-150, 300, 700T, and 2000 types carefully monitors and records
amplifier performance, including the suitability of the load in comparison with the amplifier type.
Think of the speaker as an electric motor and the Amp as the wall-current that makes it “run”. The
two principals in fact, are very similar. All speakers have a motor, consisting of the permanent
magnet at the rear of the speaker and a “voice coil” that attaches to the speaker cone and rides
back in forth in the center of the magnet. Just like a motor you would plug into the wall and say,
vacuum the floor, the amp powers the voice coil which in turn reacts to the permanent magnetic
field by pushing and pulling against it. The resultant motion moves the speaker cone and wall-la!
You have sound! (Normally U.S. Amps wouldn’t care about speakers, but we have been asked to
explain this function in greater detail-Harrumph!)
Each voice coil has a resistance, or impedance, that is crucial to the way it reacts with a given
model of U.S. Amps and vice versa. This resistance is measured and expressed in OHMS, or
Put simply, OHMS are the things that keep the amplifier speaker leads from
shorting together, which is a no-no. The less OHMS a speaker has, the closer the electrical
potential of the amplifier will be to shorting.
Speakers are typically available with 8, 4, or 2 ohm coils. There is a great deal of difference
between these ratings, as with the order of magnitude of the numbers 8,4, and 2 themselves. As 4
is TWICE as much as 2 and 8 is TWICE as much as 4, the amount of current an amplifier must
provide to drive a 4 ohm speaker is TWICE that required to drive an 8 ohm speaker, a 2 ohm coil
requires TWICE the current of a 4 ohm coil. While all this seems academic, is nonetheless of vital
importance, and is perhaps the most overlooked and unfortunate reason for expensive system
failure. Just like an electric motor and the wall socket, it is possible to stack more motors on the
circuit than it can handle.
Before you form the opinion that higher current amps are obviously better, forget it. High current is
simply a way to get power under a different circumstance. All amplifiers have current and voltage.
Really, one comes at the expense of the other, but they are both equally effective at delivering
power. “Power” is measured in WATTS, like a light bulb, and is the product of a mathmatical
equation that takes into account the current and voltage output of the amplifier in relation to the
resistance, or OHMS of the voice coil or voice coil combination. (Impedance is another word for
resistance, and the two are often interchangeable.) Let’s totally geek out together and examine
this formula, as it will help you understand the role voltage and current play in relation to speaker
impedance and power:
SPEAKER MYSTERIES EXPLAINED
HIGH CURRENT OR HIGH VOLTAGE?
Ohms of resistance.
6

VOLTS RESISTANCE CURRENT
VOLTS X CURRENT WATTS
20 X 1005
40 X 40010
20 4 5
40 4 10
The equation is kind of divided into 2 parts. If you take the time to check this out, you will see what is
REALLY COOL about amplifier bridging, and why it is so important to pay attention to the numbers.
PART ONE:
WORKING MODEL:
You have a two-channel amplifier. Each channel that has 20 VOLT “power rails”.
You have a speaker with 4 OHMS of RESISTANCE.
If you hook ONE CHANNEL to the speaker and do the math:
”5” is AMPS OF CURRENT. (“AMPS” and “CURRENT” are another one of
those interchangeable words.) Next, we will use the answer of this
first part and the “rail voltage” to determine WATTS OF POWER.
PART TWO:
So, whaddya know? You’re putting out 100 WATTS! Well, that’s all fine and dandy until you BRIDGE your
amp. There is hidden mathmatical advantage in doing so, and the only thing that can hold you back are
THE LAWS OF PHYSICS. Each channel of your amp has a positive and negative “rail voltage”. Engineers
speak of “power rails” when they refer to amplifier voltage, hence the name. Your 20 VOLT amp REALLY
has a POSITIVE 20 VOLTS and a NEGATIVE 20 VOLTS, but you are only using HALF of it for each
channel. So, you break bad with the built-in bridging capability of your U.S. Amp, and all of a sudden you
have a single 40 VOLT BRIDGED CHANNEL.
Yes, Pilgrim, you are now cooking with gas. The only thing holding you up is real life. The V divided by R
equals A thing fails to take into account the physical limitations of friction and loss, let alone the mechanical
limitations of components and design. These are considerable factors. Luckily for you, U.S. Amps
overcompensates from this standpoint, and delivers TRUE RATED 2 ohm per channel performance. Most
amplifiers are not built with the intestinal fortitude necessary to double PER CHANNEL power from 4 to 2
ohms, which as you see, QUADRUPLES your
Bridged output. Don’t worry- U.S. Amps has you covered.
SO, LETS’ SUBSTITUTE 40 VOLTS FOR 20 AND DO THE MATH:
AND HOW MANY WATTS IS THAT?
7

AWG 14 30 AMPS AWG 6 80 AMPS AWG 0 190 AMPS
AWG 12 35 AMPS AWG 4 105 AMPS AWG 00 215 AMPS
AWG 10 45 AMPS AWG 2 135 AMPS AWG 000 245 AMPS
AWG 8 60 AMPS AWG 1 160 AMPS AWG 0000 275 AMPS
GETTING WIRED
WIRE GAUGE AND AMPERAGE GUIDE
Once you have established the current needs of your system, it will be of the
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.
Another major consideration is wire. If you wish to build a truly high-powered system,
you must take into account the of the system and select your wire
gauge accordingly. The following chart can be used as a guide:
UTMOST
IMPORTANCE
Always fuse each U.S. Amp product at the recommended
amperage.
total amperage requirements
or less than
These are real numbers, right out of the 1951 It takes real
wire to do real work. Trust us on this one.
U.S. Federal Electrician’s Code Book.
BATTERIES
Batteries, and the way they operate, is one of the least understood, yet critical element of any
healthy car audio system. Even small, highly efficient systems need a minimum amount of
amperage and voltage to operate properly. The average automotive battery is designed only to
the vehicle, not run the stereo, the lights, or anything else. That job goes to the vehicle
alternator, once the engine has been started.
The alternator also recharges the battery, replacing the energy used to start the engine within a
matter of minutes. The actual work done by the battery is minimal. If the current drawn by the
vehicle lights and other electrical accessories does not exceed the amperage output of the
alternator, the average battery will last for years.
The audio system, particularly the amplifiers, add to the current draw. Most stock alternators have
excess output, anywhere from 30 to 50 amps, maybe more. A safe way to determine whether your
electrical system is adequate to handle your U.S. Amp(s) is to use one-half of the amplifier fuse
rating as a constant to determine the average current draw of the system. Unless you are one of
those people who uses your amplifier to play a sine wave, (in which case you are on your own) your
amp will not draw peak current all the time when playing music. This isn’t rocket science , but it
gets the job done. Another way is to use the charts on pages 10 & 11 to determine
based on the impedance that each channel is operating.
For each 100 watts, when playing music, count on
7.5 amps average of average current draw.
start
actual amplifier
output
8

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” when the engine is on, because it is necessary to “feed” a battery
higher voltage in order for it to charge.
14.4 volts
CARE AND FEEDING OF YOUR BATTERIES
AMPLIFIER PROTECTION: SAT (Smart Amp Technology)
SAT is an exclusive U.S. Amps technology that continuously monitors amplifier functions to insure
proper connection, supply voltage, and operating temperature. In the event of a fault condition
SAT will trigger a protection circuit to immediately shut down the amplifier. Computerized SAT,
available on the USA-150 and larger models, stores amplifier data and tracks specific faults by
type and frequency for computer download and display. Never before has such a comprehensive
analysis tool been offered on a car amplifier. Practical and useful, SAT is a
that uses a programmable on-board
computer to protect the amplifier from damage and permanently store vital information like:
diagnostic and
information retrieval system
HAND-CRAFTEDIN FLORIDA,U.S.A. HAND-CRAFTED IN FLORIDA, U. S. A.
Amplifier model and serial number.
Date of manufacture.
Total hours, minutes, and seconds
the amp has ever been on.
How often an individual channel has
shorted.
How often the vehicle battery has gone
under or over voltage.
How often the amplifier has gone into
thermal
protection.
For the Authorized Dealer SAT provides real-time
analysis and in-car diagnostics. The amp can be
remotely triggered on by SAT, and at a glance the
"live console" displays whether or not all amplifier
systems are functional.
9

200
AMPLIFIER
POWER and FUSE
Specifications*
Watts per Channel
TM TM
USA SERIESUSA SERIES
USA SERIESUSA SERIES
COMPETITION
BASS
MEKANIK
Copyright 2001 U.S. Amps Inc. All rights Reserved. *Specifications subject to change without notice.
Model 4 Ohms 2 Ohms 1 Ohm .5 Ohm .25 Ohm Fuse
400
600
1000
2000
4300
5600
USA-200
USA-400
USA-600
USA-1000
USA-2000
USA-50HC
USA-100HC
PT-35O
PT-8OO
PT-1OOO
50W 100W N/A N/A N/A 25A
100W 200W N/A N/A N/A 50A
150W 300W N/A N/A N/A 75A
300W 500W N/A N/A N/A 135A
500W 1000W N/A N/A N/A 300A
N/A N/A N/A 60A
N/A N/A N/A 75A
25W 50W 100W N/A N/A 25A
50W 100W 200W N/A N/A 50A
75W 150W 300W N/A N/A 75A
150W 300W 500W N/A N/A 135A
250W 500W 1000W N/A N/A 300A
25W 50W 100W 188W N/A 75A
50W 100W 200W 400W N/A 225A
175W
400W
550W
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
35A
80A
110A
75W x 4 90W x 4
75Wx4
200W x 1
90W x 4
350W x 1
10

200
AMPLIFIER
PERFORMANCE
Specifications*
TM TM
USA SERIESUSA SERIES
USA SERIESUSA SERIES
COMPETITION
BASS
MEKANIK
Copyright 2001 U.S. Amps Inc. All rights Reserved. *Specifications subject to change without notice.
**Measured at 4 Ohms at the circuit board.
Model
400
600
1000
2000
4300
5600
USA-200
USA-400
USA-600
USA-1000
USA-2000
USA-50HC
USA-100HC
PT-35O
PT-8OO
PT-1OOO
Bridged Output S/N Ratio Damping
Factor**
Slew
Rate
THD @
4Ohms
200W @ 4 Ohms
400W @ 4 Ohms
600W @ 4 Ohms
1000W @ 4 Ohms
2000W @ 4 Ohms
Not Bridgable
200W @ 2 Ohms
400W @ 2 Ohms
600W @ 2 Ohms
1000W @ 2 Ohms
2000W @ 2 Ohms
375W @ 1 Ohm
800W @ 1 Ohm
350W @ 4 Ohms
800W @ 4 Ohms
1100W @ 4 Ohms
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .006%
< .05%
< .05%
< .05%
102dB
102dB
102dB
102dB
102dB
102dB
110dB
110dB
110dB
110dB
110dB
115dB
115dB
115dB
> 86dB
> 86dB
> 86dB
> 200
> 400
> 600
> 800
> 1000
> 200
> 200
> 200
> 400
> 600
> 800
> 1000
> 600
> 1000
> 100
> 100
> 100
30Vus
30Vus
150Vus
150Vus
150Vus
150Vus
150Vus
30Vus
30Vus
150Vus
150Vus
150Vus
150Vus
150Vus
150Vus
150Vus
150Vus
180W x 2
@ 4 Ohms
11

One Ohm Stable Stereo Amplifier. Made In Florida,
U. S. A.
2
4
4Db Db
2
Active Xover
Two - Way
100Hz InputLine Out
MAX
GAIN
USA-400
H
I
g
h
F
u
l
l
L
o
w
RL RL
The 2-way fixed-frequency 100Hz crossover can be configured to
input the stereo high pass signal at 18db and output the summed-
mono low pass signal at 24db to another amplifier, or vice-versa. The
crossover can be defeated for full-range preamp output.
Built-in Active Crossover / Line Level Output:
USA-200 / 200X
USA-400 / 400X
Controls and Features
Amplifier Input:
The USA-200 and 400 feature
input isolation and a built-in
voltage divider that will accept
input signals from nearly any
source. It is necessary to
provide input to both channels
when operating the amplifier.
Input Sensitivity is variable from
250mv to 10 Volts.
WARNING
U.S. Amps require a
.
DO NOT use ground-loop
isolation devices on the
input of your U.S. Amp!
grounded input connection
The green light in the middle of the palm
tree is connected to the amplifier’s power
supply, and only lights when the amplifier is
in working order.
Power LED Indicator:
Gain Control:
The gain control is water and dust proof for long life and
high fidelity. The input sensitivity can be infinitely adjusted
from 250mv to 10 Volts.
Smart Amp Technology:
Both models incorporate a non-computerized version of SAT (U.S. Amps’ exclusive Smart Amp
Technology) that precisely monitors each amplifier channel, the battery voltage, and amplifier temperature.
In the event of a fault condition, SAT will activate to protect the amplifier from damage.
Connections:
All power and speaker connections are via a heavy duty barrier
terminal with gold plated hardware. Use at least 10 gauge wire
for all power and ground connections.
Clear Plexiglas Bottom:
U.S. Amps are hand-crafted to a high standard of quality in our Gainesville, Florida factory, and are
thoroughly inspected for both cosmetic and operational perfection. A clear bottom panel displays the
attention to detail found in every U.S. Amp.
Well-Engineered From
Quality Materials:
The USA-200 and 400 feature Mil-
Spec FR-4 plated-through circuit
boards, stuffed with 1% tolerance
parts and U.S. Amps’ own hand-
wound power transformers. The
amplifiers are housed in a
bead-blasted or custom
polished anodized heat sink.
The U.S. Amps logo is laser-
etched or displayed on a
Solid zinc emblem.
12

X
GND
Right
Pos Right
Neg
REM
Left
Pos Left
Neg 12V
Pos
X
GND
Right
Pos Right Neg
REM
Left
Pos Left
Neg
XGND
Right
Pos Right Neg
REM
Left
Pos
Left
Neg
12V
Pos
12V
Pos
LEFT
SPEAKER(S)
Left Positive
Left Negative
RIGHT
SPEAKER(S)
Right Negative
Right Positive
Bridged
Speaker(s)
Positive
Negative
Source Unit
Vehicle Battery
11-15VoltsDC
Vehicle Ground
F
U
S
E
Positive 12 Volt Remote
Turn-on
Positive 12 Volts to Vehicle Battery
Min. 10 Gauge
Negative 12 Volts to
Vehicle Ground. Min. 10 Gauge
USA-200:
4 Ohms: 25 Watts
2 Ohms: 50 Watts
1 Ohm: 100 Watts
Xterminator 200X:
4 Ohms: 50 Watts
2 Ohms: 100 Watts
USA-400:
4 Ohms: 50 Watts
2 Ohms: 100 Watts
1 Ohm: 200 Watts
Xterminator 400X:
4 Ohms: 100 Watts
2 Ohms: 200 Watts
Power Per Channel:
Switched 12 Volts out - 500ma
USA-200 / 200X, USA-400 / 400X
Stereo Operation
Bridged Mono
USA-200:
200X:
USA-400:
400X:
25 Amps
25 Amps
50 Amps
50 Amps
ALWAYS FUSE AT BATTERY
Total Bridged Output
USA-200:
200X:
USA-400:
400X:
200 Watts @ 2 Ohms
200 Watts @ 4 Ohms
400 Watts @ 2 Ohms
400 Watts @ 4 Ohms
Bridged
Operation:
Right Pos (+)
Left Neg (-)
13

Data
Out
SAT
WARNING:
U.S. Amps require a grounded
input connection. DO NOT use
ground-loop isolation devices
on the input of your U.S. Amp!
WARNING:
U.S. Amps require agrounded
input connection. DO NOT use
ground-loop isolation devices
on the input of your U.S. Amp!
USA-50HC, USA-100HC,
USA-600, 600X, USA-1000, 1000X,
USA-2000 and 2000X
Controls and Features
Amplifier Input:
These models feature input isolation and a built-in
voltage divider that will accept input signals from
nearly any source. It is necessary to provide input to
both channels when operating the amplifier. Input
sensitivity is variable from 250mv to 10 Volts.
Active 24dB Low Pass Crossover:
The low-pass crossover can be infinitely
adjusted to “roll off” at 24db per octave
at frequencies between 50Hz and 500Hz. The
crossover can be defeated for
full-range operation.
Gain Control:
The gain control is water and dust
proof for long life and high fidelity.
The input sensitivity can be infinitely
adjusted from 250mv to 10Volts.
Subsonic Filter:
To optimize amplifier power
in the audible frequencies, a
defeatable 36 Hz subsonic
filter provides a 12dB per
octave roll-off.
WARNING
U.S. Amps require a
.
DO NOT use ground-loop
isolation devices on the
input of your U.S. Amp!
grounded input connection
Remote
Bass Gain:
When the low-
pass crossover
is “ON” the amp-
lifier volume can
be adjusted remotely from the passenger
compartment, independent of the system
volume. The RBG works within the input
volume range set by the GAIN control,
and is about 75% effective. The RGB
comes with a knob and 15’ of cable.
Clear Plexiglas Bottom:
U.S. Amps are hand-crafted to a high standard
of quality in our Gainesville Florida factory, and
are thoroughly inspected for both cosmetic
and operational perfection. A clear bottom
panel displays the attention to detail found in
every U.S. Amp.
Smart Amp Technology:
Both models incorporate a SAT
(U.S. Amps’ exclusive Smart Amp
Technology) that precisely
monitors and tracks vital amplifier
information, including the type
and frequency of fault conditions ,
battery voltage, and amplifier
temperature. A
built-in computer stores data that
can be read by the Dealer with a
U.S. Amps data port interface to
aid in system problem-solving. In
addition, SAT keeps permanent
record of the amplifiers’ serial
number and time of operation.
Exclusive
Smart Amp
Technology
14

GND
GND
Right
Pos Right
Neg
Left
Pos Left Neg 12V Pos
12V
Pos
LEFT
SPEAKER(S)
Left Positive
Left Negative
RIGHT
SPEAKER(S)
Right Negative
Right Positive
Source Unit
Vehicle Battery
11 - 15 Volts DC
Positive
12 Volt
Remote
Turn-on
F
U
S
E
Positive
12 Volts
to Vehicle
Battery
8 Gauge
Wire
Negative 12 Volts to
Vehicle Ground. Min. 8 Gauge
USA-50HC:
4 Ohms: 25 Watts
2 Ohms: 50 Watts
1 Ohm: 100 Watts
½ Ohm: 188 Watts
USA-600:
4 Ohms: 75 Watts
2 Ohms: 150 Watts
1 Ohm: 300 Watts
600X:
4 Ohms: 150 Watts
2 Ohms: 250 Watts
USA-100HC
4 Ohms: 50 Watts
2 Ohms: 100 Watts
1 Ohm: 200 Watts
½ Ohm: 400 Watts
USA-600:
4 Ohms: 75 Watts
2 Ohms: 150 Watts
1 Ohm: 300 Watts
600X:
4 Ohms: 150 Watts
2 Ohms: 250 Watts
Power Per Channel:
USA-50HC, USA-100HC, USA-600 / 600X, USA-1000, / 1000X
Stereo Operation
REM
X
Switched
12 Volt
Output
Note Dual
Power and Gound
Connections
Right
Pos Right Neg
Left
Pos Left
Neg
Right
Pos Right Neg
GND
Left
Pos
Left
Neg
12V
Pos
12V
Pos
Bridged
Speaker(s)
Positive
Negative
Bridged Mono
Total Bridged Output
USA-50HC:
USA-100HC:
USA-600:
USA-600X:
USA-1000:
USA-1000X:
375 Watts @ 1 Ohm
800 Watts @ 1 Ohm
600 Watts @ 2 Ohms
600 Watts @ 4 Ohms
1000 Watts @ 2 Ohms
1000 Watts @ 4 Ohms
Bridged
Operation:
Right Pos (+)
Left Neg (-)
GND 12V
Pos
GND
GND
12V
Pos
Vehicle
Ground
USA-50HC:
USA-600:
USA-600X:
USA-1000:
USA-1000X:
USA-100HC:
75 Amps
75 Amps
70 Amps
135 Amps
135 Amps
135 Amps
ALWAYS FUSE AT BATTERY
15

USA-2000 and 2000X
Stereo Operation
RIGHT
SPEAKER(S)
Negative
Positive
LEFT
SPEAKER(S)
Negative
Positive
Switched
12 Volt
Output
500mA Max
Vehicle Battery
11 - 15 Volts DC
Source Unit
Positive
12 Volt
Remote
Turn-on
F
U
S
E
ALWAYS FUSE AT BATTERY
300 AMPS
Bridged Mono
Not
Used
12V
Pos
12V
Pos
GND
GND XAUX
Right
Pos
Right
Neg
X
GND
GNDREM
12V
Pos
12V
Pos
Left
Pos
Left
Neg
USA-2000 Bridged
4 Ohms: 1000 Watts
2 Ohms: 2000 Watts
2000X Bridged
8 Ohms: 1000 Watts
4 Ohms: 2000 Watts
BRIDGED
SPEAKER(S)
Negative
Positive
Vehicle
Ground
Vehicle
Ground
Switched
12 Volt
Output
500mA Max
Vehicle
Ground
Vehicle
Ground
USA-2000:
4 Ohms: 250 Watts
2 Ohms: 500 Watts
1 Ohm: 1000 Watts
Xterminator 2000X:
4 Ohms: 500 Watts
2 Ohms: 1000 Watts
Power Per Channel:
Bridged Operation: Right Positive (+), Left Negative (-)
12V
Pos
12V
Pos
GND
GND XAUX
Right
Pos
Right
Neg
X
GND
GNDREM
12V
Pos
12V
Pos
Left
Pos
Left
Neg
Total Bridged Output
USA-2000:
2000X:
1000 Watts @ 4 Ohms
2000 Watts @ 2 Ohms
1000 Watts @ 8 Ohms
2000 Watts @ 4 Ohms
16

REAR FRO
NT
FRO
NTINPU T
4-in-2
Rear
Gain
Min
Front
Gain
Min
Max
USA -4300
switch
one
switch
one
4ch
low
4ch
low
Four Channel Amplifier
Made In Florida, U.S. A.
Four Channel Amplifier
Made In Florida, U.S. A.
4ch
full
4ch
full
Bass Rear Front
Freq Freq Freq
Power
50
500
50
500
50
500
one
front high rear low
front high rear low
4channelhighpass4channel high pass
The 4300x 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 end plate of the unit is used
both to set the level of the low pass output and control the
range of the RBG. It does not matter which way the RBG
cable is connected. Use a common screwdriver tip or
something like it to tighten the RBG knob.
4300X
Four Channel
System Amplifier
Controls and Features
The 4300X features a selectable two-way electronic crossover with independent front and rear mid-high
frequency adjustment, two ohm per channel stability, and a Remote Bass Gain control that can be
mounted in the vehicle passenger compartment. 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 200 watts per bridged pair.
4-IN-2 Switch:
This switch allows
the 4300X to
accept either
single or dual
inputs, which
provides front to-
rear fading if the
source unit is so
equipped.
Independent
frequency
controls adjust
the “roll-off” of the
high and low
frequencies from
50Hz to 500Hz at
24 dB per Octave.
Remote Bass Gain:
Crossover Settings:
The two-way crossover of the 4300X can be enabled to perform four separate functions by using the
configuration switches on the amplifier end plate:
1) 4 channels
of full-range.
(Switch one is not in effect)
Gain
switch
one
front high rear low
4 channel high pass
switch
one
4ch
low 4ch full
2) 4 channels
of low pass.
(Switch one is not in effect)
Gain
switch
one
front high rear low
4 channel high pass
switch
one
4ch
low 4ch full
Gain
switch
one
front high rear low
3) 2 channels
of high pass
and 2 channels of low pass.
4 channel high pass
switch
one
4ch
low 4ch full
4) 4 channels
of high pass.
Gain
switch
one
front high rear low
4 channel high pass
switch
one
4ch
low 4ch full
17

4300X Four Channel Operation
4300X Two Channel Bridged Operation
LEFT FRONT
SPEAKER (S)
Negative
Positive
RIGHT FRONT
SPEAKER(S)
Negative
Positive
LEFT REAR
SPEAKER(S)
Negative
Positive
RIGHT REAR
SPEAKER(S)
Negative
Positive
POWER OUTPUT
PER CHANNEL:
4 Ohms: 75 Watts
2 Ohms: 90 Watts
BRIDGED OUTPUT
POWER PER CHANNEL:
8 Ohms: 150 Watts
4 Ohms: 180 Watts
TO BRIDGE THE 4300X FOR TWO CHANNEL OPERATION USE THE
RIGHT POSITIVE AND LEFT NEGATIVE OF THE FRONT AND REAR SPEAKER PAIRS
Vehicle Ground
Vehicle Battery
11 - 15 Volts DC
Source Unit
Positive 12 Volt Remote
Turn-on
ALWAYS FUSE
AT BATTERY
60 AMPS
F
U
S
E
Aux 12 Volt
Output
500mA
MAX
FL
Pos
FR
Pos
RL
Pos
RR
Pos
FL
Neg
FR
Neg
RL
Neg
RR
Neg
REM
GND
GND
RBG
RBG
12V
Pos
12V
Pos
12V
Out
RBG
Non-
Polarized
Remote
Bass
Gain
Control
Use The Supplied RBG Cable
DO NOT OPERATE
The 4300X BRIDGED
MONO AT LESS THAN
4 OHMS PER
BRIDGED CHANNEL!
Negative Negative
Positive Positive
FL
Pos
FR
Pos
RL
Pos
RR
Pos
FL
Neg
FR
Neg
RL
Neg
RR
Neg
18

INPUT
4-in-2
REAR FRO
NT
FRO
NT
Bass
Gain
Bass
Gain
Max
Rear
Gain
Min
Front
Gain
Min
Max
Power
Bass Rear Front
Freq Freq Freq
50
500
50
500
50
500
USA - 5600
Five Channel Amplifier
Made In Florida, U.S.A.
Five Channel Amplifier
Made In Florida, U.S.A.
RBG
The 5600X is protected against thermal, over
and under voltage and short circuit. The
separate power supplies of the 5600 are
individually protected against over-current.
All five channels of the 5600X are stable to two
ohms. The power of the mid-high channels
increase 17% from 4 to 2 ohms while the
Subwoofer channel increases a whopping 43%!
If the unit does not play
on bass but the mid-
highs work, or vice
versa, check the “SAT
PROTECT” LEDs at
the terminal end of the
amplifier. If one or both
is lit, there is a speaker
or wiring short, or
improper speaker load
in that area.
SAT
PROTECT
MID-HIGH
SAT
PROTECT
SUBWOOF
Smart Amp
Technology
LED Array
500
TOTAL WATTS
710
TOTAL WATTS
5600X
Four Channel
System Amplifier
Controls and Features
The five-channel 5600X features a selectable three-way electronic crossover with independent front and
rear mid-high frequency adjustment, dual power supplies, two ohm per channel stability, and a Remote
Bass Gain control that can be mounted in the vehicle passenger compartment. The U.S. Amps logo comes
separate in the box, so it can be mounted at the customers’ discretion.
4-IN-2 Switch:
This switch allows
the 5600X to
accept either
single or dual
inputs, which
provides front to-
rear fading if the
source unit is so
equipped.
Independent
frequency
controls adjust
the “roll-off” of the
high and low
frequencies from
50Hz to 500Hz at
24 dB per Octave.
The 4300x 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” slot located on the end plate of the unit is used both to
set the level of the low pass output and control the range of
the RBG. It does not matter which way the RBG cable is
connected. Use a common screwdriver tip or something
like it to tighten the RBG knob.
Remote Bass Gain:
Protection Two Ohm Stability
Amp Power @ 4 Ohms:
75 Watts x 4
Plus
200 Watts x 1
Amp Power @ 2 Ohms:
90 Watts x 4
Plus
350 Watts x 1
19

5600X Five Channel Operation
Terminal top view, facing
the rear of the 5600X
Vehicle
Ground
Source Unit
Positive 12 Volt
Remote Turn-on
FRONT LEFT
SPEAKER (S)
Negative Positive
FRONT RIGHT
SPEAKER (S)
Negative Positive
FR
Pos
RR
Pos
FR
Neg
RR
Neg
GND
12V
Pos
Sub
Pos
Sub
Neg
Aux12Volt
Output
500mA
MAX
Negative
Positive
REAR LEFT
SPEAKER (S)
Positive
Negative
RIGHT REAR
SPEAKER (S)
Positive
Negative
REM
GND
12V
Pos
12V
Out
FL
Pos
FL
Neg
RL
Pos
RL
Neg
F
U
S
E
Vehicle Battery
11 - 15 Volts DC
F
U
S
E
ALWAYS FUSE
AT BATTERY
40 AMPS
MID-HIGHS
ALWAYS FUSE
AT BATTERY
40 AMPS
SUBWOOFER
Vehicle
Ground
Vehicle
Ground
SUBWOOFER
SPEAKER(S)
20