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L10CS 10-inch (250mm) 250W RMS Powered 

Subwoofer

Quick Start Guide

Overview

For more information on the set-up and operation of this product refer to the 

product page on the 

jbl.com/specialty-audio/

 website. Should further assistance 

be required feel free to contact customer support at the numbers below.

Inside the US and Canada:

+1 888.691.4171

Outside the US and Canada: 

+44 1707 668 012

Placement and Positioning

The goal of proper placement is to achieve a smooth, extended bass 

response. We strongly recommend that you experiment with placement 

before choosing a final location for your subwoofer.

 

Place next to a wall to increase the amount of deep bass.

 

Placing in a corner 

(1)

 delivers more deep bass.

Note:   Placing in a corner 

(1) 

also activates room modes which can make the 

bass response less smooth.

 

Placing the subwoofer along the same plane as the left and right 

speakers 

(2)

 produces the best acoustic integration with the main 

speakers.

 

Placing the subwoofer close to the listening position 

(3)

 helps remove 

poor bass response caused by room variations.

The best way to determine the location for the subwoofer is by temporarily 

placing it in the listening position and playing music with strong bass and 

midbass content. Then listen while moving around to the various available 

positions for the subwoofer in the room. Putting your ears where the 

subwoofer would be placed is best. The best subwoofer location is the one 

where you perceive the best bass performance and midbass blend, due to 

acoustic reciprocity. Place the subwoofer in that location.

After finding the location that works best, adjust the Crossover, Volume, and 

Polarity to fine tune the output of the subwoofer even further.

Wiring and Connections

L10CS 10-inch (250mm) 250W RMS Powered Subwoofer Quick Start Guide | Rev 1.0 20221129 | Part No. 950-0632-001
©2022 Harman International | Features, Specifications, and Appearance subject to change without notice.

Pg 1 of 2

Box Contents

1x L10cs Classic Powered Subwoofer
1x Region Specific Power Cord

1x Safety Sheet

1x Quick Start Guide (This Document)

Left

1

2

3

Left

Right

All in One Music 

System

Listening Position

jbl.com/specialty-audio/

CAUTION

AVIS

RISK OF ELECTRIC SHOCK

 DO NOT OPEN

ATTENTION: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

定格電圧:

定格消費電力:

定格周波数:

L10cs

POLARITY

Harman International Industries, Incorporated.

8500 Balboa Blvd, Northridge CA 91329 United States.

European Representative: Harman International Industries, Incorporated.

EMEA Liaison

Office,

Danzigerkade 16G, 1013 AP

Amste

rdam, The Netherlands.

UK

Address: Ground Floor,

Westsi

de 2, London Road, Apsley, Hemel

Hempstea

d, Hertfordshire,

HP3 9TD, United Kingdom.

Designed and Engineered in Northridge CA USA

Made in China

L10cs

POLARITY

Harman International Industries, Incorporated.

8500 Balboa Blvd, Northridge CA 91329 United States.

European Representative:

 Harman International Industries, Incorporated.

EMEA Liaison

Office,

Danzigerkade 16G, 1013 AP

Amste

rdam, The Netherlands.

UK Business Address:

Ground Floor,

Westsi

de 2, London Road, Apsley, Hemel

Hempstea

d, Hertfordshire,

HP3 9TD, United Kingdom.

Designed and Engineered in Northridge CA USA

Made in China

L10cs

POLARITY

Harman International Industries, Incorporated.

8500 Balboa Blvd, Northridge CA 91329 United States.

European Representative:

 Harman International Industries, Incorporated.

EMEA Liaison

Office,

Danzigerkade 16G, 1013 AP

Amste

rdam, The Netherlands.

UK Business Address:

Ground Floor,

Westsi

de 2, London Road, Apsley, Hemel

Hempstea

d, Hertfordshire,

HP3 9TD, United Kingdom.

Designed and Engineered in Northridge CA USA

Made in China

Business

Single Sub/LFE Out

L10cs

CAUTION

AVIS

RISK OF ELECTRIC SHOCK

 DO NOT OPEN

ATTENTION: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

定格電圧:

定格消費電力:

定格周波数:

L10cs

POLARITY

Harman International Industries, Incorporated.

8500 Balboa Blvd, Northridge CA 91329 United States.

European Representative: Harman International Industries, Incorporated.

EMEA Liaison

Office,

Danzigerkade 16G, 1013 AP

Amste

rdam, The Netherlands.

UK Business Address: Ground Floor,

Westsi

de 2, London Road, Apsley, Hemel

Hempstea

d, Hertfordshire,

HP3 9TD, United Kingdom.

Designed and Engineered in Northridge CA USA

Made in China

L10cs

POLARITY

Harman International Industries, Incorporated.

8500 Balboa Blvd, Northridge CA 91329 United States.

European Representative:

 Harman International Industries, Incorporated.

EMEA Liaison

Office,

Danzigerkade 16G, 1013 AP

Amste

rdam, The Netherlands.

UK Business Address:

Ground Floor,

Westsi

de 2, London Road, Apsley, Hemel

Hempstea

d, Hertfordshire,

HP3 9TD, United Kingdom.

Designed and Engineered in Northridge CA USA

Made in China

L10cs

POLARITY

Harman International Industries, Incorporated.

8500 Balboa Blvd, Northridge CA 91329 United States.

European Representative:

 Harman International Industries, Incorporated.

EMEA Liaison

Office,

Danzigerkade 16G, 1013 AP

Amste

rdam, The Netherlands.

UK Business Address:

Ground Floor,

Westsi

de 2, London Road, Apsley, Hemel

Hempstea

d, Hertfordshire,

HP3 9TD, United Kingdom.

Designed and Engineered in Northridge CA USA

Made in China

L

R

Pre Amp

OUTPUTS

Stereo Pre Amp Out

L10cs

EN

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