Crown CROWN K Series User manual

102010-2

2/98

K-Series-Series

-Series-Series

-Series

Elkhart, IN 46515-1000 U.S.A. Telephone: 219-294-8000.

Fax: 219-294-8329. Trademark Notice:

Balanced Current

Amplifier

™,and

BCA

™are trademarks and

Crown

®is a

registered trademark of Crown International, Inc. Other

trademarks are the property of their respective owners.

120 VAC North

American

Units Only:

Commercial

Audio

E106377

Lightning Bolt Symbol:

This symbol is used to alert the

user to the presence of danger-

ous voltages and the possible

risk of electric shock.

Exclamation Mark Symbol:

This symbol is used to alert the

user to make special note of im-

portant operating or mainte-

nance instructions found in the

reference manual.

Watch for these symbols:

Page 2

K-Series Balanced Current Amplifier™

Read all safety and oper-

ating instructions before

operating the K-Series

amplifier. Follow all

instructions carefully and

heed any warnings given.

Hi! I'm Mick, Ill be

giving you the de-

tails about your

new K-Series Amp!!

Obtain assistance frObtain assistance fr

Obtain assistance from qualified serom qualified ser

om qualified serom qualified ser

om qualified ser--

vice personnel if any of the followingvice personnel if any of the following

vice personnel if any of the following

occurs:occurs:

occurs:

• The power cord or plug has been

damaged in any way.

• Foreign objects or liquid has fallen

into the amplifier enclosure.

• The amplifier has been exposed to

rain or has been partially or totally

immersed in any liquid.

• The amplifier has been dropped or

the chassis has been damaged.

• You notice a marked change in per-

formance, or your K-Series amp oth-

erwise does not appear to operate

normally.

CAUTION:

Do not locate sensitive,

high-gain equipment such

as preamplifiers or tape

decks directly above or be-

low the unit. If an equip-

ment rack is used, we

recommend locating the

amplifier(s) in the bottom of

the rack and the preampli-

fier or other sensitive

equipment at the top.

Friendly Page

of Tips and

Warnings

Keep your K-Series amplifier

away from sources of heat,

such as a radiator or oven.

Do not cover or surround your

amp with material which may

retain heat, such as a

blanket or curtain.

Important:

Driving heavy loads for sustained periods of time

may cause parts of the amplifier’s case to reach

temperatures which will be hot to touch. But don’t

be alarmed.The amplifier’s internal protection

circuitry ensures maximum temperature levels will

remain well below any level that might be

harmful to the amplifier.

Page 3

K-Series Balanced Current Amplifier™

Do not drop or

spill any foreign

(or domestic)

object or liquid

into the K-Series

amplifier.

Protect the power

cord attached to

your K-Series am-

plifier. Route it to

avoid foot traffic

or other situations

where the cord

might be stretched

or pinched. Pay spe-

cial attention to the

cord connector and

attachment points.

Clean your

K-Series amp

only with a

damp cloth!

DO NOT BYPASS OR DEFEAT THE

GROUNDING OR POLARIZATION MEANS

USED ON THE K-SERIES AMPLIFIERS.

MAKE SURE ALL BLADES ON THE

POLARIZED POWER PLUG CAN BE

FULLY INSERTED INTO THE EXTENSION

CORD, RECEPTACLE OR OTHER OUTLET

THAT WILL BE USED WITH THE UNIT.

WARNING: Shock hazard.To reduce

the risk of fire or electric shock, do

not expose this unit to rain or mois-

ture. Do not immerse your K-Series

amplifier in any liquid. Do not operate

your amplifier near a pool, bathtub or

other standing water.

Page 4

K-Series Balanced Current Amplifier™

Unpacking Your

K-Series Amp

Please unpack and inspect your amplifier for any damage that

may have occurred during transit. If damage is found, notify

the transportation company immediately. Only you can initiate

a claim for shipping damage. Crown will be happy to help as

needed. Save the shipping carton as evidence of damage for

the shipper’s inspection.

We also recommend that you save all packing materials so

you will have them if you ever need to transport the unit.

NEVER SHIPTHE UNITWITHOUTTHE FACTORY PACK.

FCC COMPLIANCE NOTICE

This equipment has been tested and found to comply

with the limits for a Class A digital Device, pursuant to

Part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interfer-

ence when the equipment is operated in a commercial

environment. This equipment generates, uses and can

radiate radio frequency energy and, if not installed and

used in accordance with the instruction manual, may

cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely

to cause harmful interference in which case the user

will be required to correct the interference at his own

expense.

“The user is cautioned that any changes or modifica-

tions not expressly approved by Crown International

could void the user’s authority to operate the equip-

ment.”

Page 5

K-Series Balanced Current Amplifier™

Page 6

K-Series Balanced Current Amplifier™

Quick Start!

First things first. We know you just can’t wait to

crank up your new Crown®

K-Series

amplifier.

And the last thing you want to do is dig through

pages of tech-talk to find out where the “ON”

switch is. So that’s why we provided you with this

quick and simple page to get you up and running

right away. Just take a few minutes to read through

this—no more than five or ten, max—you’ll be glad you did.

1. Make sure the

K-Series

amp and all other equipment is

turned OFF before you begin wiring. The amp power switch,

which is located on the far right side of the front panel, is

“OFF” when pressed downward.

2. Mount your

K-Series

amp securely in the rack.

3. Connect the left and right inputs coming from your mixer,

preamp, or other processor. You can use either balanced

1/4-inch phone or 3-pin XLR connectors. You can also

choose to run in MONO mode, with either bridged outputs,

“Y” inputs, or both. If so, see the sections starting on page 14

for further instructions.

4. Connect the output wiring (left and right speakers).

5. Connect your

K-Series

amp and other equipment to the ap-

propriate power source.

6. Turn on your mixer, preamp, signal processor, or any other

equipment in your system EXCEPT your

K-Series

amplifier.

(Remember: save the best for last.)

7. Make sure the Channel 1 and Channel 2 level (volume) con-

trols on your

K-Series

amplifier are turned all the way down

(counter-clockwise), then flip the power switch “ON” (press

upward). Note: After a two-second delay, the “Enable” light

will glow a bright green to indicate power is on. If no audio

signal is present at the amp, the enable light will then switch to

a dim green.

Page 7

K-Series Balanced Current Amplifier™

8. (Now comes the fun!) Supply input, adjust amp levels and

enjoy.

CAUTION: Excessive output levels may toast your speakers.

Crown’s

-Series amplifier has such low distortion, you may

not realize the actual level being reached until it’s too late.

Please exercise caution and drive your speakers responsi-

bly, or at least warn your neighbors!

9. You may notice that your

K-Series

amplifier becomes warm

to the touch after a few minutes of use. Don’t be alarmed.

This is a normal operating condition for your

K-Series

ampli-

fier. The

K-Series

of amplifiers are designed to be convection

cooled, and therefore radiate heat passively to the

enviroment. Refer to page 26 for more details.

Typical Stereo

Hookup

Page 8

K-Series Balanced Current Amplifier™

Page 9

K-Series Balanced Current Amplifier™

Contents

Friendly Page of Tips and Warnings ...................... 2

Unpacking Your

K-Series

Amplifier ........................ 4

Features ................................................................ 5

Quick Start ............................................................ 6

1 Welcome ............................................................. 10

2 Very Detailed Install ............................................. 14

3 Operation ............................................................ 21

4 Other Issues........................................................ 26

5 Specifications ..................................................... 31

6 Service ................................................................ 36

Illustrations

Typical Stereo Hookup .......................................... 7

1.1 The

K-Series

Amplifier .................................... 10-11

1.2 The Big Picture: Controls, Indicators and

Connectors ................................................... 12-13

2.1 Mounting Dimensions .......................................... 14

2.2 Mono Mode Switches .......................................... 15

2.3 Input Sensitivity Switch ........................................ 15

2.4 Typical Input Wiring ............................................. 16

2.5 Stereo Output Wiring ........................................... 17

2.6 Bridge Mono Output Wiring ................................. 18

2.7 Stereo Hookup .................................................... 19

2.8 Bridged-Mono Output Hookup ............................ 19

2.9 “Y” Mono Input Hookup ....................................... 20

2.10 “Y” Mono Input / Bridged Output ......................... 20

3.1 Front Panel Indicators & Controls ........................ 21

3.2 Back Panel Controls ............................................ 23

3.3 Back Panel Fuse Location ................................... 25

4.1 Balanced & Unbalanced Input Wiring ................. 28

4.2 Balanced Input Wiring ......................................... 29

4.3 Unbalanced Input Wiring .................................... 30

5.1 Awesome Frequency (Amplitude) Response ....... 35

5.2 Superior Damping Factor .................................... 35

Page 10

K-Series Balanced Current Amplifier™

Thank you for choosing Crown! Mick and his team of enthusi-

astic engineers have worked long hours to craft a totally new

kind of amplifier—the

K-Series.

These are the first amplifiers to

incorporate Crown’s patented BCA™ (Balanced Current Am-

plifier™) technology, and we are all very proud to have in-

vented them. Our Balanced Current Amplifier makes use of a

special type of circuitry which allows high levels of power out-

put without all of the associated heat you find in a conventional

amplifier. And that’s very good news for you!

How high is the power output? The

amplifier produces an

impressive 1,500 watts and weighs only 32 pounds, while the

produces a whopping 2,500 watts while weighing only 38

pounds; both without using a cooling fan!* Of course, the ab-

sence of a cooling fan means your amp runs quieter (no fan

noise) and cleaner (no need for filters) and requires very little

maintenance (we

thought

you’d like that).

* 1,500 watts and 2,500 watts total from both channels (for the

and

respectively; 750 and 1,250 watts per channel). See the Specifications sec-

tion for details.

1 Welcome

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