Zapco ST-2B Bedienungsanleitung

ST-B SERIES

Owner’s Manual

Before o erating the unit, lease read this manual throughly and retain it for future reference.

MISSION STATEMENT

Committed to Excelle ce

ZAPCO is dedicated to the pursuit of audio fidelity. Our prime objectives are to

desi n and manufacture audio products of unsurpassed quality, to provide

unparalleled support and service for these products and to conduct business

in a manner that will enhance the quality of life for all involved.

Experie ce

(K owledge from doi g)

There is absolutely no substitute for experience; that is a simple fact of life.

Another simple fact is that ZAPCO has, for over forty years, been the leader in

definin quality standards for the car audio industry.

These years of experience have led to a thorou h understandin of the

challen es that are unique to the world of car audio. ZAPCO's relentless quest

for sonic purity consistently yields ima inative desi ns that utilize the most

innovative technolo ies. The resultin products set the criteria by which all

others in the industry are jud ed.

Table of Co te ts

Before you start your installation ................................................................... 2

Plannin your power connections .................................................................. 3

Wire size ................................................................................................. 4

Mountin your ST-B amplifier ......................................................................... 5

Inputs and Controls ......................................................................................... 6

ST-2B Input Ends .....................................................................................6

ST-4B Input Ends ..................................................................................... 7

ST-1B Input Ends ..................................................................................... 8

Speaker Wirin of the ST-B Amplifiers ............................................................ 9

ST-2B Speaker Wirin ............................................................................. 9

ST-4B Speaker Wirin ............................................................................. 11

ST-1B Speaker Wirin ............................................................................. 13

Technical Specifications .................................................................................. 13

The ST-B Series. Great sou d for every day use.

ZAPCO has a reputation for sound reproduction and quality that is unsurpassed.

It is our dedication to sonic purity and our passion for performance that built

Zapco's reputation. With all the new amps comin into the market, not one

has been any threat to Zapco's standin as the premium amp and processor

line. Just check the audio competition scene and the audio forums.

But not everyone wants to compete. The question was this: could Zapco put

it's 40-years of audio experience to work to develop an amp for every-day

use? An amp that all can afford but that will stay true to the Zapco herita e for

sound and reliability? Absolutely! We can and we have! The new ST-B amps

are a testament to the fact that you can build a quality product with reat

sound in an amplifier for every day use.

With the Studio-B amplifiers Zapco brin s the sound quality and reliability that

built the Zapco le end to an amplifier that everyone can afford.

Before you start your i stallatio

ZAPCO hi hly recommends that a fuse or circuit breaker be placed within 18"

of the battery. Althou h you will add a fuse or fuse block near the amplifier it

is still a possibility that a pinched power wire between the component fuse

and the battery could result in a short, or even a fire. The protection device

should be placed where it can be accessed easily and all wirin should be

routed safely and correctly accordin to the followin uidelines:

Do not run wirin close to hot or spinnin objects.

Always use wire rommets when routin wire throu h the firewall or any

other metal panels.

Make sure that the potential for pinched wirin is avoided by routin all wires

away from movin hin es and seats. This also includes brake, as and clutch

pedals, hood and trunk hin es, etc.

Continuous exposure to excessive sound pressure levels may cause permanent

hearin loss. ZAPCO stron ly advises that you use common sense when settin

volume levels. If you experience rin in in the ears, it could cause permanent

hearin dama e!

When connectin our amplifiers to pre-wired stock speakers, care must be

taken that there are no common connections between left and ri ht speaker

wires, i.e. two or more speakers usin the same round connection (very

common in pre-85 cars), as this will cause the amplifier to o into immediate

protection or may cause dama e to the amplifier. Output connections are not

common chassis round. Please follow the hookup instructions in this owner's

manual. Any questions should be directed to your local ZAPCO dealer.

Pla i g your power co ectio s

The power end plates of the Zapco ST-B ampliﬁers carry the power connecons

and the speaker connecons and vary somewhat by the number of channels.

For example, the power end of the ST-4B below has (of course) speaker

connecons for four channels. The ST-B amps all have on-board fuses and the

fuse ran as printed above the fuses. The main 12-volt power input, the

12-volt turn-on wire, and the main Ground connecon are common to both

models.

• The main power input must be connected the vehicle baery's posive

(+) terminal, and a main system fuse should be placed close to the baery

• The main round or ne ave connecon must be securely aached to

bare metal at the vehicle frame, or other heavy chassis component with

a direct connecon to the frame

Note: Seat bolts a d seat belt bolts are NOT good grou d poi ts

• The terminal between the main power and round is the +12 turn-on

input and can be connected to the head unit turn-on output wire.

If none is available it can be connected to an accessory (ACC) terminal.

You should avoid usin any i nition-on (IGN) wire, as they can be noisy

Tur -o trigger wire

+12 volt at Baery posive termi al Grou d to chassis

Some words about Power a d Grou d

Note: The seco d most commo cause of u derperformi g amplifiers is i sufficie t power

curre t or a pour power co ectio . The most commo cause of u derperformi g amplifiers is

i sufficie t grou d curre t or a bad grou d co ectio .

12-volt current: Battery Power works only if it travels in a complete circuit from

the battery positive terminal to the battery ne ative terminal. Main power

input, of course, is attached to the battery positive terminal. Ground current is

returned to the battery throu h the chassis to the to the point where the battery

is rounded.

The current available for your amplifier to use to produce power will be

restricted by the smallest au e of wire in the circuit and by the weakest physical

connection in the circuit.

Wire Size

It's often surprisin how many people will obsess about si nal wire but routinely

provide the amplifier with only a fraction of the current it needs to do its job.

The most common wire au e used in car audio is 10- au e, and the most

common location for amplifiers is in the trunk.

Wire Sizi g Chart

4 ft 7 ft 10 ft 13 ft 16 ft 19 ft 22 ft 28 ft

0-20 amps 14 12 12 10 10 888

20-35 amps 12 10 886664

35-50 amps 10 8866444

50-60 amps 88644442

65-85 amps 66442220

85 -105amps 66422220

105-125 amps 44422000

125-150 amps 22220000

Let's look at a fairly small system. If you use a 50 watt/ch amp (25 amps)

for the hi hs and a 100 watt/ch amp (40 amps) for the woofers, you need at

least a 4- au e and maybe a 2-Gua e wire to provide 65 amps at the trunk.

Anythin less and your car won't o boom. It'll just o Blap!

Le gth of Ru

Note: It takes lots of curre t to make lots of power!

Remember! An electrical circuit is just that... a complete circuit. For current to

travel, you must complete the circuit from the positive terminal to the ne ative

terminal (which is connected to the vehicle frame). So what ever Gau e wire

you use for power (B+) you must also use for round (B-).

Note: A 4-gauge power wire eeds 4-gauge grou d wire!

Use the Wire Sizin Chart! Add up the fuse values on the amplifier(s) then

choose the proper size wire based on the distance from the car battery to the

amplifier location. A ain, always use the same au e wire for the main round

as you do for the main power. Always make your round as short as possible

and secure it to a clean solid surface, preferably the vehicle frame.

Mou ti g your ST-B amplifier

Mountin your Zapco amplifier is easy. Just keep in mind a few uidelines:

• The amplifier can be mounted in any direction, on wood, metal, or carpet

• The metal chassis of the amp can be rounded or left isolated

• The amplifier requires adequate ventilation. Creatin power creates heat,

and coolin requires air. Position the amplifier with sufficient surroundin

area for air supply and keep the end plates clear for future access

• Keep the amplifier out of the en ine compartment or other locations

that may cause excessive heat or moisture

• Do not mount the amplifier to a subwoofer box or other place that may

have excessive vibration

Setti g Gai s: Gain pots are not volume controls. Before you first turn on your

system, you should make sure all ain controls are set to minimum. Gain

controls should be used only if absolutely necessary. Turnin up ain controls

causes increased noise, makes distortion more likely and reduces the dynamic

ran e of your system. If you head unit does not have sufficient output, you will

et much better results by investin in a line driver to provide more si nal to

the amplifier.

ST-2B I put/Co trols E ds

The Input ends of the ST-2B amplifier is where you find the si nal input

connectors,the pass throu h outputs, the crossover controls. For Hi h Level

(speaker level) you also find the port for the input plu .

1• Speaker level input plu for OEM hookup

2• RCA inputs from an after-market head unit

3• Pass throu h RCA output allows "daisy

chainin " amplifiers

4• Variable ain control (set to minimum

before initial turn-on)

5• Bass boost switch for 0, 6dB, or 12dB

6• Low Pass frequency selector for the bass

crossover

7• Crossover selector for low pass, full ran e,

or hi h pass

8• Hi h pass filter for the mids/hi hs

9• Green power-on LED and red protect LED

2 3

1 7

ST-4B I put/Co trols E ds

The ST-4B has similar functions as the ST-2B but the 4 channel layout puts the

controls in different positions.

3 4

25 9

7812

610

11 13

1• Speaker level input plu for OEM hookup

2• Front crossover function selector for full

ran e of hi h pass

3• Front Hi h Pass frequency control

4• Front Channels Variable ain control

(set to minimum before initial turn-on)

5• Front channels RCA inputs

6• Pass throu h RCA output (rear channels

can feed another amp)

7• Rear channels RCA inputs

8• Rear Channels Variable ain control

(set to minimum before initial turn-on)

9• Rear channels Bass Boost switch for 0, 6dB,

or 12dB

10• Rear Low Pass frequency control

11• Rear crossover function switch for hi h pass,

full ran e, or low pass

12• Rear Hi h Pass frequency control

13• Green power-on LED and red protect LED

ST-1B I put/Co trols E ds

The ST-1B has similar functions as the other ST-B amps but the 1 channel layout

puts the controls in different positions. Plus the ST-1B has a remote control port.

1• RCA inputs

2• RCA outputs

3• Variable ain control (set to minimum

before initial turn-on)

4• Crossover function selector for full ran e

of low pass

5• Low Pass frequency control

6• Sub Sonic filter

7• 0-180° Phase control

8• 0-12 dB Bass boost control

9• Remote control port

10• Power/protect LED

24 7

6 10

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