KRK 10S User manual

KRK10s SubwoofeR

USER GUIDE

Warning: To reduce the risk of fire or electric shock, do not

expose this unit to rain or moisture.

The lightning flash with an arrowhead symbol within an equilateral

triangle, is intended to alert the user to the presence of uninsulated

dangerous voltage within the product’s enclosure that may be of

sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to

alert the user to the presence of important operating and

maintenance (servicing) instructions in the literature accompanying

the product.

Do not place this unit on an unstable cart, stand or tripod, bracket

or table. The unit may fall, causing serious injury to a child or adult

and serious damage to the unit. Use only with a cart, stand, tripod,

bracket or table recommended by the manufacturer or sold with

the unit. Any mounting of the device on a wall or ceiling should

follow the manufacturer’s instructions and should use a mounting

accessory recommended by the manufacturer.

An appliance and cart combination should be moved with care.

Quick stops, excessive force and uneven surfaces may cause the

appliance and cart combination to overturn.

Read and follow all the safety and operating instructions before

connecting or using this unit. Retain this notice and the owners

manual for future reference.

All warnings on the unit and in its operating instructions should be

adhered to.

Do not use this unit near water; for example, near a bath tub,

washbowl, kitchen sink, laundry tub, in a wet basement or near a

swimming pool.

The unit should be installed so that its location or position does not

interfere with its proper ventilation. For example, it should not be

situated on a bed, sofa, rug or similar surface that may block the

ventilation openings; or placed in a built-in installation, such as a

bookcase or cabinet, that may impede the flow of air through its

ventilation openings.

The unit should be situated from heat sources such as radiators,

heat registers, stoves or other devices (including amplifiers) that

produce heat.

The unit should be connected to a power supply outlet only of the

voltage and frequency marked on its rear panel.

The power supply cord should be routed so that it is not likely to be

walked on or pinched, especially near the plug, convenience

receptacles, or where the cord exits from the unit.

Unplug the unit from the wall outlet before cleaning. Never use

benzine, thinner or other solvents for cleaning. Use only a soft

damp cloth.

The power supply cord of the unit should be unplugged from the

wall outlet when it is to be unused for a long period of time.

Care should be taken so that objects do not fall, and liquids are not

spilled into the enclosure through any openings.

This unit should be serviced by qualified service personnel when:

A. The power cord or the plug has been damaged; or

B. Objects have fallen, or liquid has been spilled into the unit; or

C. The unit has been exposed to rain or liquids of any kind; or

D. The unit does not appear to operate normally or exhibits a

marked change in performance; or

E. The device has been dropped or the enclosure damaged.

DO NOT ATTEMPT SERVICING OF THIS UNIT

YOURSELF. REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL

Upon completion of any servicing or repairs, request the service

shops assurance that only Factory Authorized Replacement Parts

with the same characteristics as the original parts have been used,

and that the routine safety checks have been performed to

guarantee that the equipment is in safe operating condition.

REPLACEMENT WITH UNAUTHORIZED PARTS MAY RESULT IN

FIRE, ELECTRIC SHOCK OR OTHER HAZARDS.

ATTENTION

POUR …VITER LES CHOC ELECTRIQUES, INTRODUIRE LA

LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE

C

ORRESPONDANTE DE LA PRISE ET POUSSER JUSQUíAU

FOND.

CAUTION

TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF

PLUG TO WIDE SLOT FULLY INSERT.

If an indoor antenna is used (either built into the set or installed

separately), never allow any part of the antenna to touch the metal

parts of other electrical appliances such as a lamp, TV set etc.

CAUTION

POWER LINES

Any outdoor antenna must be located away from all power lines.

OUTDOOR ANTENNA GROUNDING

If an outside antenna is connected to your tuner or tuner-

preamplifier, be sure the antenna system is grounded so as to

provide some protection against voltage surges and built-up static

charges. Article 810 of the National Electrical Code, ANSI/NFPA No.

70-1984, provides information with respect to proper grounding of

the mast and supporting structure, grounding of the lead-in wire to

an antenna discharge unit, size of grounding conductors, location

of antenna discharge unit, connection to grounding electrodes and

requirements for the grounding electrode.

a. Use No. 10 AWG (5.3mm2) copper, No. 8 AWG (8.4mm2)

aluminium, No. 17 AWG (1.0mm2) copper-clad steel or bronze

wire, or larger, as a ground wire.

b. Secure antenna lead-in and ground wires to house with stand-off

insulators spaced from 4-6 feet (1.22 - 1.83 m) apart.

c. Mount antenna discharge unit as close as possible to where lead-

in enters house.

d. Use jumper wire not smaller than No.6 AWG (13.3mm2) copper,

or the equivalent, when a separate antenna-grounding electrode

is used. see NEC Section 810-21 (j).

EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL

ELECTRICAL CODE INSTRUCTIONS CONTAINED IN

ARTICLE 810 - RADIO AND TELEVISION EQUIPMENT.

NOTE TO CATV SYSTEM INSTALLER: This reminder is

provided to call the CATV system installers attention to

Article 820-40 of the National Electrical Code that provides

guidelines for proper grounding and, in particular, specifies

that the ground cable ground shall be connected to the

grounding system of the building, as close to the point of

cable entry as practical.

CAUTION

R

ISK OF ELECTRIC

SHOCK DO NOT OPEN

ATTENTION:

R

ISQUE DE CHOC ELECTRIQUE

N

E PAS OUVRIR

CAUTION: TO REDUCE THE RISK OF ELECTRIC

SHOCK, DO NOT REMOVE COVER (OR BACK). NO

USER SERVICEABLE PARTS INSIDE. REFER SERVICING

TO QUALIFIED SERVICE PERSONNEL.

IMPORTANT SAFETY INSTRUCTIONS

1. “An apparatus with Class I construction shall be connected to

a mains sockets outlet with protective earthing connection.”

2. “Where the mains plug or an appliance coupler is used as the

disconnect device, the disconnection device shall remain readily

operable.”

3. “1A fuse is used to US market, voltage will be set to 115V before

shipment: 500mA fuse is used to European market, voltage will

be set to 230V before shipment.”

KRK’s industry-leading line of studio monitors and subwoofers provide a level of precision

and performance unheard of in monitor systems. Your KRK10s subwoofer features

several key design elements that have come to be recognized as the “studio standard” for

the world's finest engineers, producers, and musicians. Your KRK subwoofer delivers

world-class performance—at a price that makes this a truly uncommon value.

Contents

WorldClassPerformanceinStudioReferenceMonitors

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

KRK Systems’ Design Philosophies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

System Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Connecting Your System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Hooking Up Your Subwoofer: Stereo Systems . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Subwoofer Placement and Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Hooking Up Your Subwoofer: 5.1 Surround . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Bass Management Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Removing the Subwoofer Grill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

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Congratulations! Welcome to the latest KRK subwoofer series which includes the KRK10s.

This KRK subwoofer series provides even better performance and accuracy, raising the bar

once again above the competition. We aren’t the new standard. We have always been the

standard among the world’s finest engineers, producers, musicians, and DJs.

This manual is intended to inform you of the many features of your new KRK subwoofer and

its operation. We encourage you to take a few minutes to familiarize yourself with the

information in this manual. Thank you for choosing KRK!

SAFETY: For your safety and to ensure correct operation of this product, please take a

moment to read the IMPORTANTSAFETYPRECAUTIONS section.

CAUTION: Never remove the rear panel of the subwoofer. To do so could result in

electric shock. A qualified technician should perform any repair or service to the

electronics.

This product is capable of producing sounds at a volume that could potentially be

damaging to hearing and result in permanent hearing loss over an extended period of time.

IMPORTANTNOTE:UnpackingandVisualInspection

Your KRK subwoofer was originally packaged in a specially designed carton with

packaging materials designed specifically for this unit. Please save these items. They should

be used when transporting or shipping your subwoofer. These will help preserve your

warranty.

Introduction

Unpacking

Your new subwoofer has been carefully inspected and tested prior to packing and shipping.

After unpacking your subwoofer, carefully inspect it for exterior damage and immediately

report any physical damage during transit to your shipping carrier. Save the shipping boxes

and all packaging materials in case the unit needs to be returned to your local dealer or KRK

Systems, LLC.

Please read the warranty card that was included in the shipping carton with your product

before shipping to KRK Systems. A Return Material Authorization (RMA) from KRK Systems

is required before shipping a product to KRK Systems for repair. After obtaining a RMA from

KRK Systems, all KRK Systems products in need of repair can be returned to the dealer

where they were purchased or sent directly to KRK Systems.

• For the safest possible return to KRK, please use the shipping carton and

packaging materials that were originally provided with your subwoofer.

• KRK cannot be responsible for any damages incurred during the shipping process due

to poor packing. Make certain to insure your shipment.

• If your subwoofer is out of warranty and you would like a quotation before

servicing your product, please include a note with your contact information on it and

we will contact you with a service quote. Service will be performed once your method

of payment has been established and approved.

• For service or replacement part quotes call KRK Customer Service at 954-316-1580.

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KRKSystems’DesignPhilosophies

Thank you for purchasing the KRK10s active studio subwoofer. We are the most

dedicated monitor company in the world and we are thrilled you have joined our ever

growing family of loyal customers.

OurFocusisYourMix

At KRK, our focus has always been to make the most accurate studio monitors available at

any price.

We don’t offer PA gear, mixers or motorcycles – just the tools you need to deliver a great

mix. From the legendary Exposé Series, to VXT to the new RoKit Generation 2 (“G2”) series

– we know recording monitors.

We do not add sonic characteristics like some other manufacturers that make their

monitors appear to provide more SPL or add low frequencies that demo well in the store.

When you use a KRK monitor, you can be confident that your mixes will translate well to the

wide variety of playback conditions that can occur in the real world. We want your audio

mixes to sound good everywhere – not just in your studio!

PortDesign

Our ports are designed to greatly reduce air flow turbulence for high performance audio

reproduction. The result? Clear, accurate and well designed low frequency extension.

EvenMoreAccuratethanBefore

We tweaked our speaker voicing to provide even more accurate frequency response for

amazing audio reproduction using our custom made KRK drivers. What you hear is what

you get, where ever your music is being played. Our drivers are all custom-designed by

our world-class studio monitor engineering team.

ImitationbutnotPerfection–AStatementtoourCompetition

If the sincerest form of flattery is imitation, we must own that aspect of the recording

monitor world. From using Kevlar in driver designs to copying our radiused edge approach,

the competition knows a good thing when they hear it. However, chasing our past won’t

deliver a product that comes close to the sound of a KRK monitor. See ya later

competition!

EnoughAboutUs–Let’sGetGoing!

So enough about why we do the things we do. Let’s read on about the features of your new

KRK subwoofer so you can start enjoying your new subwoofer now!

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KRK provides a standalone, high performance room correction system called ERGO.

ERGO provides the ability to use up to two subwoofers with dedicated crossover

functionality and delay compensation. For more information about using ERGO with your

monitoring system please visit our website at http://www.krksys.com/product_ergo.php

KRK’sERGORoomCorrectionSystem

Volume

The input sensitivity is adjusted

(c ou nte r clo c kw i se r e duc e s

sensitivity) with the rear panel

mounted Volume control.

Adjustment range is from -30dB to

+6dB. Factory preset gain is +6dB. You may need

to adjust this to match the level of your monitors.

L o w - P a s s F r e q u e n c y 

Adjustment

Low-Pass Frequency adjustment is

performed through a coninuously

variable adjustment. The range is

from 50Hz to 130Hz. If you are

using the Subwoofer Line Outs for the monitors,

you will want to place this at the 80Hz position

(see additional information in the Installing

YourMonitors section).

PhaseSwitch

Functionally, the Phase switch is a polarity inversion mechanism whose

position affects the phase relation of the subwoofer output to the other

speakers in your room. The proper switch position of 0 or 180 degrees

depends on a number of variables. These variables include, the distance of

the subwoofer from the listening position and monitors, as well as the

system's absolute polarity and the bass response of the room (refer to the Subwoofer

SetupandPlacement section in order to determine the correct switch position for your

monitoring system and room).

UsingtheGroundLift

Engaging the ground lift switch can sometimes reduce ground loop noise in

your system. By providing an AC mains ground on the KRK10s and proper

installation in a 'quiet studio' environment, the system is happily quiet.

However, noise will be induced if the monitor is installed in less than

desirable settings (i.e. audio cables run alongside power cables, behind

refrigerators, near florescent lighting, older buildings with bad wiring), or with certain

equipment with lots of RFI (lap-top supplies, PCs, generator supplied AC lines). This is

because there is a ground loop through the sub panel, mains wiring, source, and back to

the subwoofer on Pin-1 of the Audio inputs. Ground currents traveling through this loop

impose different voltages along the path at different gain stages within the circuitry, thus

creating noises.

The Ground lift switch does not affect the AC mains/panel safety ground. It does not 'open'

the connection thru Pin-1 to the panel, but increases the resistance (from zero ohms to one

thousand ohms) to reduce the ground current and induced noises. Safety is not

affected.

SystemControls

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