UHC5 UHC4 UHC2 - Ultimate Sound

1 X 150 + 4 X 60W RMS

5 CHANNEL AMPLIFIER

UHC4

4 X 60W RMS

4 CHANNEL AMPLIFIER

UHC2

2 X 60W RMS

2 CHANNEL AMPLIFIER

ULTIMATE

®

138 University Parkway

Pomona, CA 91768

Toll Free: 888-909-9988

Telephone: 909-594-2604

Fax: 909-594-0191

INTRODUCTION

I. Description

This device is a high power, audio amplifier. Use it responsibly. Very loud music can cause permanent hearing loss. This amplifier is intended for installation in vehicles with a 12-Volt, negative ground electrical system. Attempting to connect or operate the amplifier in another type of electrical system may cause damage to the amplifier or the electrical system.

II. About This Manual

Read the Instructions-

Be sure that you have read all operating instructions and understand all safety precautions before installing and operating the amplifier. We recommend that you have your

UHC

Follow the Instructions-

The instructions are intended to help you safely obtain the best performance from the amplifier. Carefully follow all installation and operating instructions.

Save the Operating Manual-

Keep the manual in a safe place after installing the amplifier. You may have questions later.

Text Conventions used in this Manual-

Bold-

Headings and important information.

Bold, Underlined-

Very important information.

"Bold"-

As labeled on the amplifier, or quoted from elsewhere in this manual.

III. Safety and Operating Precautions-

Caution!

This symbol warns the user of a potential risk or hazard if instructions are not followed.

This arrow symbol points to a specific instruction for avoiding a potential hazard.

ii

1. Installation

1.1

Installation- Mounting the Amplifier

Step 1- Disconnect the negative (-) battery cable before mounting the amplifier or making any connections. Check the battery and alternator ground (-) connections. Make sure they are properly connected and free of corrosion

Step 2- Choose a mounting location for your amplifier. Find a location on a flat surface away from heat and moisture. Be sure the mounting location and the drilling of pilot holes for mounting will not present a hazard to any wires, control cables, fuel lines, fuel tanks, hydraulic lines, or other vehicle systems or components. Common mounting locations are under the front passenger seat, or in the trunk area. Choose a location with unimpaired air circulation. The amplifier will dissipate heat more efficiently if mounted vertically.

Step 3- Use the supplied screws and rubber bushings. Press the rubber bushings into the mounting holes at each end of the amplifier. Place the amplifier in the mounting location, and mark the positions of the holes with a marker, pen or pencil. Carefully drill the mounting holes in the marked positions.

Caution!

Check carefully before drilling any pilot holes.

Step 4- Use the supplied mounting screws to securely fasten the amplifier to the mounting surface.

1

Step 5- Use the supplied Allen head screws to mount the end caps to the ends of the main heat sink.

Step 6- Use the supplied screws to attach the end caps to the mounting surface.

Caution!

Make sure to mount the amplifier using the supplied screws and rubber bushings. Do not mount the amplifier by the end caps alone.

1.2

Installation- Power Connections

Step 1- Run a power cable from the battery to the amplifier mounting location. Use rubber grommets to protect the cable anywhere it has to go through metal.

UHC5, UHC4 - Use #4 AWG or larger power and ground cable.

Step 2- Connect one end of an in-line fuse holder to the power cable.

Connect the other end of the fuse holder to the positive battery post with

20 cm (or less) of the same cable. This fuse location will protect the system and the vehicle against the possibility of a short circuit in the power cable. Be sure to use a fuse and fuse holder adequate for the application. Do not place a fuse in the holder at this time. The fuse rating is depending on the power- and ground cable size. The maximum

Caution!

Bridging fuses or replacing a fuse with one of a higher rating may

cause damage to the amplifier and the vehicle's electrical system.

Step 3- Run a remote turn on cable from the switched +12V source you will be using to turn on the system components. This may be a toggle switch, a relay, or your source unit’s remote trigger wire, or power antenna trigger wire. Run this lead to the amplifier mounting location.

Use #18 AWG wire or larger.

Step 4- Locate a secure grounding connection as close to the amplifier as possible. Make sure the location is clean and provides a direct electrical connection to the frame of the vehicle. Connect one end of a short piece of the same size cable as the power cable to the grounding point. Run the other end of the cable to the amplifier mounting location.

Step 5- connect the ground cable to the screw terminal labeled

“POWER, (GND)”.

Step 6- Connect the power cable to the amplifier at the screw terminal labeled “POWER, +12V”.

2

Step 7- Connect the remote turn on cable to the screw terminal labeled

“POWER, (REM)”.

1.3

Installation- Speaker Connections

Step 1- Run #16 AWG or larger connecting wire from your speakers to the amplifier mounting location. Keep speaker wires away from power cables and amplifier input cables. Use grommets anywhere the wires have to pass through holes in the metal frame or sheet metal. Connect to the speakers according to the type of terminals on each speaker.

Step 2- Strip 3/8" of insulation from the end of each wire and twist the wire strands together tightly. Make sure there are no stray strands that might touch other wires or terminals and cause a short circuit.

Step 3- Crimp spade lugs over the wire ends or tin the ends with solder to provide a secure termination.

Step 4- Connect the wire ends to your amplifier as follows:

UHC5 UHC4

- "FRONT" and "REAR" SPEAKER

TERMINALS

FRONT

SPEAKER

(L+) (L-) (R+) (R-)

UHC4

REAR

SPEAKER

(L+) (L-) (R+) (R-)

( + ) ( - )

BRIDGE

( + ) ( - )

BRIDGE

Follow the left, (L+) (L-), and right, (R+) (R-), channel and polarity markings, making sure they match the channel and polarity of the connections at the speakers.

FRONT

REAR

SPEAKER

(L+) (L-) (R+) (R-)

3

SUBWOOFER TERMINALS

Follow the polarity(+) (-) markings first. You

SUBWOOFER

(+) (-)

may want to experiment with reversing the (+) and (-) connections to see which way sounds best. The subwoofer channel is 1

stable, and can drive up to four 4

subwoofers connected in parallel.

SPEAKER

(L+) (L-) (R+) (R-)

UHC2 -

SPEAKER TERMINALS

Follow the left, (L+) (L-), and right, (R+) (R-

), channel and polarity markings, making sure they match the channel and polarity of the connections at the speakers.

MULTIPLE SPEAKER

CONNECTION

( + ) ( - )

BRIDGE

PARALLEL- Each additional speaker decreases the load impedance

for the amplifier. The amplifier delivers more current and works harder.

PARALLEL CONNECTION USING 4 OHM SPEAKERS

4 Ohm 2 Ohm 1.3 Ohm 1 Ohm

L

I

F

A

M

P

I

E

R

O

U

T

P

U

T

+

-

(+)

(

-

)

(+)

(

-

) (

(+)

-

)

(+)

(

-

)

SERIES- Each additional speaker increases the load impedance for

the amplifier. Impedances higher than 8 ohms are rarely used for car audio.

4

I

F

I

A

M

P

L

E

R

O

U

T

P

U

T

+

-

SERIES CONNECTION USING 4 OHM SPEAKERS

4 Ohm 8 Ohm 12 Ohm 16 Ohm

(+)

(

-

)

(+)

(

-

)

(+)

(

-

)

(+)

(

-

)

1.4

Installation- Self-

Bridging, 2+1 Mode

SPEAKER

(L+) (L-) (R+) (R-)

BRIDGED MONO-

UHC4 UHC2

Connect a 4

or 2

ohm speaker or multiple speaker load to the terminals marked “(+), BRIDGE, (-)”, making sure they match the polarity of the connections at the speakers.

( + ) ( - )

BRIDGE

Caution!

Speaker or multiple speaker loads totaling less than 4 ohms are not recommended for “Bridged” or “2+1 Mode” to the 4 channel output terminals of the UHC5

2+1 MODE- (TRI-MODE)

Simultaneous stereo and mono operation, “2+1 Mode”, requires a passive crossover to send low frequencies to the mono speaker and higher frequencies to the stereo speakers. The following table lists the component values for a 6 dB/Octave crossover at common frequencies using 4 ohm speakers:

FREQUENCY

80 Hz

100 Hz

120 Hz

150 Hz

INDUCTOR

7.5 mH

6.5 mH

5.5 mH

4 mH

CAPACITOR

470 uF

330 uF

330 uF

220 uF

2+1 MODE WIRING DIAGRAM-

Use 100 Volt, non-polar capacitors, and connect them in series with the stereo speakers as shown in the diagram. Connect the inductor in series

5

with the mono speaker as shown in the diagram. Be sure the inductor is rated to handle the power of your amplifier.

(+)

(

-

)

L(+)

L (-)

IN D U C T O R

(+)

(

-

)

C A P A C IT O R S

R(+)

R (-)

(+)

(

-

)

1.5

Installation- Input Connections

Low Level, High Impedance, Gold Plated RCA

Input Jacks-

For connecting to a source providing preamp level outputs. Use heavy duty RCA patch cords designed for mobile applications . Run the patch cables carefully, maintaining as much distance as possible from power, speaker, and accessory wiring. Make sure the RCA plugs fit tightly for a secure connection.

R

L

INPUT

FRONT REAR

R

L

INPUT INPUT

R

R L

LINE

INPUT

LINE

O U T P U T

R L

UHC2- High Impedance, Gold Plated RCA

Input and Output Jacks- The UHC2 pair of preamplifier output jacks to provide an input signal to another amplifier or component in the system. The output signal is preamplified to maintain signal quality.

L

The UHC5 subwoofer channel is connected internally to the RCA input jacks. There are no separate inputs for the subwoofer channels.

6

1.6

Installation- Check all Connections

Recheck all connections before reconnecting the negative(-) battery cable.

Insert the correct value fuse in the fuse holder at the battery before attempting to turn on the system.

2. Operation

2.1

Operation- Input Level adjustments

LEVEL

VOLTS

5.0-0.15

Adjust the input level for the marked channel(s) with a small screwdriver through the opening marked “LEVEL”. Turn

CW(clockwise) to increase the level, CCW(counterclockwise) to decrease. Amplifiers will run cooler and produce less system noise at lower level settings.

Consult an experienced installation specialist for assistance in balancing the levels in multi-amplifier systems, or systems with signal processing accessories.

The subwoofer channels have frequency adjustment and level controls but no separate RCA input jacks. Use a small screwdriver to adjust the low pass level through the opening marked “SUBWOOFER, LEVEL".

2.2

Operation- Optional Remote Subwoofer

Level Control

REMOTE SUBWOOFER

VOLUME

MIN MAX

Mount the optional accessory remote level control in an accessible location and run the connecting cable back to the UHC5. Connect the subwoofer remote level control by plugging the telephone plug at the end of the accessory cable into the RJ-11 telephone

REMOTE

BASS

jack on the UHC5. Set the "Low-

Pass" output level to the maximum level possible (full CW). Adjust the remote level control CW to increase the subwoofer level, CCW to decrease the subwoofer level.

RJ11

7

2.3

Operation- Electronic Noise

Reduction(ENR

)

ENR

L

ENR

R

It is usually not necessary to change the factory

ENR  ENR 

adjustment capability allows you to fine tune the balanced input circuits through the openings marked "ENR

, L,

R" for maximum noise rejection.

To properly adjust the ENR

requires:

A small, non-metallic, alignment tool that will fit through the opening. One is supplied with your UHC

A small speaker that you can hold up to your ear while it is connected to the amplifier.

The amplifier must be installed correctly, and connected to the source and any other components normally used in the system.

Caution!

Never insert anything metallic into any openings in the amplifier side panels.

1. With the system turned off, disconnect the main speakers from the channels you are going to fine tune.

2. Mark the position(s) of the "LEVEL" control(s) for the channel(s) you are going to fine tune.

3. Turn the "LEVEL" control(s) fully CW for the channel(s) you are going to fine tune.

4. Connect the small speaker to the channel you want to adjust.

5. Make sure the source unit volume is fully CCW (volume completely turned down).

6. Start the engine, and turn on the system.

7. Use the small screwdriver to adjust the ENR

for the channel the speaker is connected to. Listen to the speaker, and adjust for the minimum noise level.

8. Repeat for any other channel you wish to fine tune.

8

2.4

Operation- Built-in Crossovers

CROSSOVER

FULL-LPF-HPF

FREQ.

pass crossovers for bi-amplifying your system. Select

"FULL, LPF, or HPF" by moving the position of the slide switch for each pair of channels. Selecting

"FULL" defeats the crossover functions

After selecting the crossover function, adjust the low pass or high pass frequency with a small screwdriver through the opening marked “FREQ.”. Turn CW to set to a higher frequency, CCW to set to a lower frequency.

HERTZ

50-250

Use a small screwdriver to adjust the low pass frequency through the opening marked “SUBWOOFER, FREQ.”

2.5

Operation- Protection Circuits and

L.E.D. Indicators

PWR.

“PWR.” L.E.D. INDICATOR- Provides a visual indication that the amplifier is turned on.

P R O T .

“PROT.” L.E.D. INDICATOR- Provides a visual indication that a problem exists and the protection circuitry has protected the amplifier by shutting it down. Turn the system off and correct the problem before turning the system back on.

THERMAL PROTECTION- The amplifier will shut down if its temperature exceeds a safe operating level. The amplifier will remain off until it cools to a safe operating temperature. Exercise care, the exterior of the amplifier may get uncomfortably hot to the touch before shutting down.

OVERLOAD AND SHORT CIRCUIT PROTECTION- The amplifier will shut down if a short circuit condition exists, or if electrical current demands exceed safe levels.

D.C. OFFSET PROTECTION- The amplifier will shut down if an unsafe D.C. offset condition exists.

FUSE 30A

30A

FUSE PROTECTION- A blown fuse indicates a problem that should be corrected before the fuse is replaced. Always replace with the same value fuse.

Never substitute a larger value fuse.

9

2.6

Operation- Location of Terminals,

Controls and LED indicators

1. RCA input jacks

4. Frequency adjust

2. Input level adjust

5. ENR™ adjust

3. Crossover select

CROSSOVER

FREQ

FRONT

ENR

L

LEVEL

ENR

R

FRONT

R

5 0 H z 2 5 0 H z 5 V 0.15V

FULL

L O W - P A S S

HI-PASS

L

REAR

REAR

ENR

L

LEVEL

ENR

R

FREQ

REMOTE

CROSSOVER

CONTROL

SUB

WOOFER

LEVEL FREQ

R

L

5 V 0.15V

50Hz 2 5 0 H z

F U L L

L O W - P A S S

HI-PASS

5 V 0 . 1 5 V 50Hz 250Hz

1. Power terminals

4. Speaker terminals

2. Power L.E.D.

3. Protection L.E.D.

5. Subwoofer terminals 6. Fuses

FRONT

REAR

(+)

(L+)

SPEAKER

(L-)

(R+) (R-)

PROT

+12V

POWER

REM GND

PWR

SUB WOOFER

(+) (-)

BRIDGE

(-)

FUSE-40A

40A

FUSE-40A

40A

1. RCA input jacks

4. Frequency adjust

2. Input level adjust

5. ENR™ adjust

3. Crossover select

CROSSOVER

FREQ

ENR

L

FRONT

LEVEL

ENR

R

INPUT

50Hz 250Hz

F U L L

L O W - P A S S

HI-PASS

5 V 0 . 1 5 V

L R L

INPUT

ENR

L

REAR

LEVEL

ENR

R

FREQ

CROSSOVER

R

5 V 0.15V

5 0 H z 2 5 0 H z

F U L L

L O W - P A S S

H I - P A S S

1. Power terminals

4. Speaker terminals

2. Protection L.E.D.

5. Fuses

3. Power on L.E.D.

(L+)

REAR

SPEAKER

(L-) (R+) (R-)

PWR PROT

+12V

POWER

REM GND

(L+)

FRONT

SPEAKER

(L-) (R+) (R-)

(+)

BRIDGE

(-)

FUSE-40A

40A

FUSE-40A

40A

(+)

BRIDGE

(-)

10

1. RCA input jacks

4. Frequency adjust

2. Input level adjust

5. ENR™ adjust

3. Crossover select

6. RCA output jacks

FREQ LEVEL

L

ENR

R

5 V 0.15V

FULL

L O W - P A S S

HI-PASS

CROSS OVER

50Hz

2 5 0 H z

1. Power terminals

4. Speaker terminals

2. Protection L.E.D.

5. Fuse

R

LINE

OUTPUT

LINE

INPUT

R

L L

3. Power on L.E.D

FUSE

40A

+12V

POWER

REM GND

PWR PROT

(L+)

SPEAKER

(L-) (R+) (R-)

(+)

BRIDGE

(-)

11

Appendix A: Features and Specifications

Standard Features-

Circuit

Board

2

Stable

1

Stable

Bridgeable

Tri-mode

Terminals

Soft Start

Input

Circuitry

Electronic

Noise

Reduction

Line Output

(full range)

Built-in

Crossover

Protection

MOSFET,

PWM

Power

Supply

Supply

Voltage

5 CHANNEL

POWER

AMPLIFIER

4 CHANNEL

POWER

AMPLIFIER

2 CHANNEL

POWER

AMPLIFIER

Double sided, glass epoxy, through hole mounted

Subwoofer

Channel

Yes

Yes Yes

Channel 1-4

8

, or 4

8

, 4

, or 2

8

, 4

, or 2

Yes, self-bridging

Gold plated RCA jacks, speaker and power terminals

Yes

BIC

Floating ground, balanced input circuitry for maximum noise rejection

Yes, adjustable for maximum effectiveness

-

RCA line out

Yes, Low Pass, High Pass, 12dB/Octave, 50-250Hz.

Protected against thermal and electrical overload, shortcircuit and DC offset

Regulated, Pulse Width Modulated, MOSFET power supply

+12VDC, Negative ground

12

Performance Specifications-

4

RMS Power,

,

THD<0.05%

5 CHANNEL

POWER

AMPLIFIER

1 X 150 + 4 X

60 Watts RMS

4 CHANNEL

POWER

AMPLIFIER

4 X 60

Watts RMS

2 CHANNEL

POWER

AMPLIFIER

2 X 60 Watts

RMS

2

RMS Power,

,

THD<0.2%

Bridged RMS

Power, 4

,

THD<0.2%

Signal to Noise

Ratio, "A"

Weighted

Damping

Factor

Frequency

Response

Stereo

Separation "A"

Weighted

Input

Sensitivity

Input

Impedance

Fuse

1 X 300 + 4 X

100 Watts RMS

(1 X 150) + 2 X

200 Watts RMS

-100dBA

>200

10Hz. – 50kHz.

-65dBA

150mV – 5.0V

25k

2 X 40A

4 X 120

Watts RMS

2 X 240

Watts RMS

-100dBA

>200

10Hz. - 50kHz.

-65dBA

150mV - 5.0V

25k

2 X 40A

2 X 120 Watts

RMS

1 X 240 Watts

RMS

-105dBA

>200

10Hz. - 50kHz.

-65dBA

150mV - 5.0V

25k

40A

These specifications are subject to change in the continuing effort to improve the product.

13

Appendix B: Troubleshooting

Condition

No sound

Possible Cause

Low or no remote turn on voltage, or no remote turn on connection

Possible Solution

Check the remote turn on connection and the voltage at the amplifier and source unit

Blown fuse(s)

Wiring problems

Amplifier shut down

Distortion Input level not properly adjusted

Speaker damage

Speakers out of phase Poor bass response

Ticking noise

Radiated noise from spark plug wires

Whining noise

Blown speakers

Protection circuit protecting against overheating or overload

Alternator noise caused by poor grounding of amplifier, source, other component, battery, or alternator

Check all system fuses

Recheck all connections

Check for short circuits

Check speakers on another amplifier

Check for adequate ventilation

Check load impedance(2 ohm stereo, 4 ohm bridged)

Check speaker wiring for short to the vehicle chassis

Reduce input level

Readjust amplifier input level

Check speakers on another amplifier

Recheck speaker wiring

Reverse polarity of one channel

Reroute amplifier input wiring

Install a noise filter

Adjust ENR

Check all ground connections

Install a noise filter on the source unit’s power cable

Install a coupling transformer in the signal path to improve ground isolation for the signal path

Adjust ENR

14

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