Definitive Technology DESCEND DN12 User manual

DESCEND™

Owner’s Manual

DN12 and DN15 Subwoofers

English ...............................................3

Español............................................21

Français............................................40

OWNER’S MANUAL

English

Welcome

Thank you for choosing a Deﬁnitive Technology

Descend subwoofer. In order to ensure that you

experience the ﬁnest performance possible, we

encourage you to take a moment to fully read this

owner’s manual and familiarize yourself with the

proper installation and setup procedures for your

subwoofer. Enjoy!

Contents

Safety Precautions .......................................................4

Getting to Know Your Subwoofer ..............................9

Getting Started..........................................................10

Positioning the Subwoofer .......................................11

AC Mains (Power) Connection..................................12

Connection and Setup ..............................................13

Adjusting and Using the Descend Subwoofer........15

Subwoofer Low-Pass Filter Guide ............................18

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

Service ........................................................................19

Limited Warranty .......................................................20

English

Safety Precautions

1. The lightning ﬂash with arrowhead symbol within

an equilateral triangle is intended to alert the

user to the presence of non-insulated “dangerous

voltage” within the product’s enclosure that may

be of sufﬁcient magnitude to constitute a risk of

electric shock.

• CAUTION: To reduce the risk of electric shock,

do not remove cover (or back), as there are no

user-serviceable parts inside. Refer servicing to

qualiﬁed personnel.

• The exclamation point within an equilateral

triangle is intended to alert the user to

the presence of important operating and

maintenance instructions in the literature

accompanying the appliance.

2. Correct disposal of this product. This

marking indicates that this product should

not be disposed with other household wastes

throughout the EU. To prevent possible

harm to the environment or human health from

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 appliance.

CAUTION

RISK OF ELECTRIC SHOCK!

DO NOT OPEN!

uncontrolled waste disposal, recycle it responsibly

to promote the sustainable reuse of material

resources. To return your used device, please use

the return and collection systems or contact the

retailer where the product was purchased. They can

take this product for environmental safe recycling.

3. CAUTION: To reduce the risk of ﬁre or electric shock,

do not expose this apparatus to rain or moisture.

The apparatus shall not be exposed to dripping or

splashing and that objects ﬁlled with liquids, such as

vases, shall not be placed on apparatus.

4. WARNING: The battery (battery or batteries or

battery pack) shall not be exposed to excessive heat

such as sunshine, ﬁre or the like.

5. Read these instructions.

6. Keep these instructions.

7. Heed all warnings.

8. Follow all instructions.

9. Do not use this apparatus near water.

10. Clean only with a dry cloth.

11. Do not block any ventilation openings. Install in

accordance with the manufacturer’s instructions.

12. Do not install near any heat sources such as

radiators, heat registers, stoves, or other apparatus

(including ampliﬁers) that produce heat.

Please see additional Safety Precautions on the

following page.

OWNER’S MANUAL

English

13. No naked ﬂame sources, such as lighted

candles, should be placed on the apparatus.

14. Class I construction should be connected to a mains

socket outlet with a protective earthing connection.

15. Do not defeat the safety purpose of the

polarized or grounding plug. A polarized plug

has two blades with one wider than the other.

A grounding plug has two blades and a third

grounding prong. The wide blade or the third prong

is provided for your safety. If the provided plug does

not ﬁt into your outlet, consult an electrician for

replacement of the obsolete outlet.

16. Protect the power cord from being walked on or

pinched particularly at the plugs, convenience receptacles,

and at the point where they exit from the apparatus.

17. Use only attachments/accessories speciﬁed by

the manufacturer.

18. Use only with the cart, stand, tripod,

bracket, or table speciﬁed by the manufacturer,

or sold with the apparatus. When a cart or rack

is used, use caution when moving the cart/apparatus

combination to avoid injury from tip-over. The speaker

may tip over, causing serious personal injury or death.

19. Unplug the apparatus during lightning storms

or when unused for long periods of time.

20. Refer all servicing to qualiﬁed personnel. Servicing

is required when the apparatus has been damaged

in any way, such as when power supply cord or plug

is damaged, when liquid has been spilled or objects

have fallen into the apparatus, when the apparatus

has been exposed to rain or moisture, does not

operate normally, or has been dropped.

21. CAUTION: Danger of explosion if battery is

incorrectly replaced. Replace only with the same or

equivalent type.

22. The battery (battery or batteries or battery pack)

shall not be exposed to excessive heat such as

sunshine, ﬁre or the like.

23. WARNING: Do not recharge non-rechargeable

batteries.

24. WARNING: The mains plug/appliance coupler

is used as the disconnect device. The disconnect

device shall remain readily operable.

25. CAUTION: To completely disconnect this

product from the mains, disconnect the plug from

the wall socket outlet. The mains plug is used to

completely interrupt the power supply to the unit

and must be within easy access by the user.

26. The equipment can be used at a maximum

ambient temperature of 113 °F (45 °C).

Safety Precautions (continued)

Please see additional Safety Precautions on the

following page.

English

FCC Information (For US Customers)

1. Compliance Information

This product complies with Part 15 of the FCC

Rules. Operation is subject to the following two

conditions: (1) this product may not cause harmful

interference, and (2) this product must accept any

interference received, including interference that

may cause undesired operation.

2. Important Notice: Do Not Modify This Product.

This product, when installed as indicated in the

instructions contained in this manual, meets FCC

requirements. Modiﬁcation not expressly approved

by Sound United may void your authority, granted

by the FCC, to use the product.

3. NOTE:This product has been tested and found

to comply with the limits for a Class B digital device,

pursuant to Part 15 of the FFC Rules. These limits are

designed to provide reasonable protection against

harmful interference in a residential installation.

This product generates, uses, and can radiate radio

frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful

interference to radio communications. However,

there is no guarantee that interference will not occur

in a particular installation. If this product does cause

harmful interference to radio or television reception,

which can be determined by turning the product OFF

and ON, the user is encouraged to try to correct the

interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment

and receiver.

• Connect the product into an outlet on a circuit

different from that to which the receiver is

connected.

• Consult the local retailer authorized to distribute

this type of product or an experienced radio/TV

technician for help.

Notes on Use

• Avoid high temperatures.

• All for sufﬁcient heat dispersion when installed in

a rack.

• Handle the power cord carefully.

• Hold the plug when unplugging the cord.

• Keep the unit free from moisture, water, and dust.

• Unplug the power cord when not using the unit

for long periods of time.

• Do not obstruct the ventilation holes.

• Do not let foreign objects into the unit.

• Do not let insecticides, benzene, and thinner

come in contact with the unit.

• Never disassemble or modify the unit in any way.

• Ventilation should not be impeded by covering

the ventilation openings with items such as

newspapers, tablecloths or curtains.

Safety Precautions (continued)

Please see additional Safety Precautions on the

following page.

OWNER’S MANUAL

English

• Naked ﬂame sources such as lit candles should

not be placed on the unit.

• Observe and follow local regulations regarding

battery disposal.

• Do not expose the unit to dripping or splashing ﬂuids.

• Do not place objects ﬁlled with liquids, such as

vases, on the unit.

• Do not handle the mains cord with wet hands.

• When the switch is in the OFF (STANDBY)

position, the equipment is not completed

switched off from MAINS.

• The equipment shall be installed near the power

supply so that the power supply is easily accessible.

• Do not keep the battery in a place exposed to

direct sunlight or in places with extremely high

temperatures, such as near a heater.

• Do not bend forcedly the plug on the equipment

for the connection between the connector and

micro USB/USB cable.

• CAUTION (for ampliﬁer):

HOT SURFACE. DO NOT TOUCH.

The top surface over the internal heat sink

may become hot when operating this product

continuously. Donot touch hot areas, especially

around the “Hot surface mark” and the top panel.

Safety Precautions (continued)

Cautions on Using Batteries

• WARNING: DO NOT INGEST BATTERY—

CHEMICAL BURN HAZARD. The remote control

supplied with this product contains a coin/button

cell battery. If the coin/button cell battery is

swallowed, it can cause severe internal burns in

just 2 hours and can lead to death. Keep new and

used batteries away from children. If the battery

compartment does not close securely, stop using

the product and keep it away from children. If

you think batteries may have been swallowed

or placed inside any part of the body, seek

immediate medical attention.

• Insert the speciﬁed batteries in the remote control

unit.

• Replace the batteries with new ones if the set

does not operate even when the remote control

unit is operated close to the unit. (The supplied

batteries are only for verifying operation. Replace

them with the new batteries at an early date.)

• When inserting the batteries, be sure to do so in

the proper direction, following the + and – marks

in the battery compartment.

Please see additional Safety Precautions on the

following page.

English

• To prevent damage or leakage of battery ﬂuid,

– Do not use a new battery together with an old

one.

– Do not use two different types of batteries.

– Do not attempt to change dry batteries.

– Do not short-circuit, disassemble, heat, or

dispose of batteries in ﬂames.

– Do not keep the batteries in a place exposed

to direct sunlight or in places with extremely

high temperatures, such as near a heater.

• If the battery ﬂuid should leak, carefully wipe the

ﬂuid off the inside of the battery compartment

and insert new batteries.

• Remove the batteries from the remote control unit

if it will not be in use for long periods.

• Used batteries should be disposed of in

accordance with local regulations regarding

battery disposal.

• The remote control unit may function improperly if

rechargeable batteries are used.

• Explosion risk exists if the battery is replaced by

an incorrect type.

For California Customers Only

This product contains a battery that contains

perchlorate material—special handling may apply.

See https://dtsc.ca.gov/perchlorate/

Safety Precautions (continued)

EU Declaration of Conformity

Hereby, Sound United, LLC declares that our product

is in compliance with the following EU/EC Directives:

• EMC:2014/30/EU

• LVD:2014/35/EU

• RoHS: 2011/65/EU and amendment Directive (EU)

2015/863

• ErP: EC regulation 1275/2008 and its frame work

directive 2009/125/EC including amendment

801/2013

EU importer/contact:

Sound United Europe, a division of D&M Europe B.V.

Beemdstraat 11, 5653 MA

Eindhoven, The Netherlands

UKCA Declaration of Conformity

Hereby, Sound United, LLC declares that our

product is in compliance with the following

UK regulations:

• Electrical Equipment (Safety) Regulations

2016

• Electromagnetic Compatibility Regulations 2016

• The Restriction of the Use of Certain Hazardous

Substances in Electrical and Electronic

Equipment Regulations 2012

• Eco design for Energy-Related Products

Regulations 2010

UK Importer: D&M Audiovisual Ltd.

Cells 1 & 2 Kopshop, 6 Old London Road

Kingston Upon Thames KT2 6QF UK

OWNER’S MANUAL

English

Getting To Know Your Subwoofer

RIGHT

–

BC D

–

LEFT

–

N O P

A VOLUME UP/DOWN BUTTON

BINTELLIGENT PHASE CONTROL

BUTTON

C EQ BUTTON

D DISPLAY BRIGHTNESS BUTTON

ELOW PASS FILTER UP/DOWN

BUTTON

F LED POWER INDICATOR

G AUTO/ON/12V 3-WAY SWITCH

H IR IN

I 12V TRIGGER

J LINE IN

K HIGH LEVEL INPUT (LEFT/RIGHT)

L LFE IN

M SERVICE PORT ONLY

N POWER ON/OFF SWITCH

O FUSE (T6.3AL / 250V)

P AC POWER INLET

–

English

Getting Started

1. Plug in the subwoofer to the wall outlet and

power up the subwoofer using the power switch on

the ampliﬁer panel.

2. Set the volume to the V20 setting on the front

panel display.

3. Set the low-pass control according to the chart

on page 18.

Pro Tip: Low pass frequency is usually set too high

in most systems, especially if the speakers you are

using don’t have an additional high pass ﬁlter being

applied. Chances are you can lower the low pass

frequency on your subwoofer.

4. If you are using an audio processing unit that

has a built-in room correction function, follow the

instructions for that process.

5. If you are not using a piece of equipment that

has built-in room correction, follow step 6 below

using multiple media sources (music, movies, TV),

and tune the volume of the subwoofer to match the

volume of your set of speakers.

6. Tune the low-pass setting on your subwoofer

according to the amount of “High-Bass” or “Low-

Midrange” signal being produced by your system. If

the media sounds “muddy”, “chesty”, or “boomy”,

turn down the low pass frequency until your system

sounds even. If the media’s low end sounds “thin”,

“detached”, or “uneven”, turn up the low pass

frequency until your system sounds even.

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