Nxg NX-PROSUB125 Manuale utente

Owner’s Manual

Model NX-PROSUB125

10˝ 125 watt

Powered Subwoofer

Model NX-PROSUB300

12˝ 300 watt

Powered Subwoofer

The lightning flash with 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.

Le symbole éclair avec point de flèche à l’intérieur d’un triangle équilatéral est utilisé

pour alerter l’utilisateur de la presence à l’intérieur du coffret de “voltage dangereux”

non isolé d’ampleur suffisante pour constituer un risque d’éléctrocution.

The exclamation point within an equilateral triangle is intended to alert the user

of the presence of important operating and maintenance (servicing)

instructions in the literature accompanying the appliance.

Le point d’exclamation à l’intérieur d’un triangle équilatéral est employé pour alerter

les utilisateurs de la présence d’instructions importantes pour le fonctionnement

et l’entretien (service) dans le livret d’instruction accompagnant l’appareil.

1. Read Instructions – Read all the safety and

operation instructions before operating the NX-

PROSUB125/NX-PROSUB300 (subwoofer).

2. Retain Instructions – Keep the safety and

operating instructions for future reference.

3. Heed Warnings – Follow all warnings on the

subwoofer and in these operating instructions.

4. Follow Instructions – Follow all operating and

other instructions.

5. Water and Moisture – Do not use the sub-

woofer near water – for example, near a bathtub,

washbowl, kitchen sink, laundry tub, in a wet

basement or near a swimming pool.

6. Heat – Locate the subwoofer away from heat

heat sources such as radiators, or other devices

that produce heat.

7. Power Sources – Connect the NX-PROSUB-

125/NX-PROSUB300 only to a power supply of

the type described in these operation instructions

or as marked on the subwoofer.

8. Power Cord Protection – Route power supply

cords so that they are not likely to be walked upon

or pinched by items placed upon or against them,

paying particular attention to cords at plugs, con-

venience receptacles, and the point where they

exit the NX-PROSUB125/NX-PROSUB300.

9. Object and Liquid Entry – Do not drop objects

or spill liquids into the inside of the subwoofer.

10. Damage Requiring Service – The NX-PRO-

SUB125/NX-PROSUB300 should be serviced

only by qualified service personnel when:

A. NX-PROSUB125/NX-PROSUB300 power

supply cord or the plug has been damaged; or

B. Objects have fallen, or liquid has spilled in

the NX-PROSUB125/NX-PROSUB300; or

C. NX-PROSUB125/NX-PROSUB300 has been

exposed to rain; or

D. NX-PROSUB125/NX-PROSUB300 does not

appear to operate or exhibits a marked change

in performance; or

E. The NX-PROSUB125/NX-PROSUB300 has

been dropped, or its chassis damaged.

11. Servicing – Do not attempt to service the

subwoofer beyond those means described in this

operating manual. All other servicing should be

referred to the qualified service personnel.

12. To prevent electric shock, do not use the

NX-PROSUB125/NX-PROSUB300 polarized

plug with an extension cord, receptacle or other

outlet unless the blades can be fully inserted to

prevent blade exposure.

Pour préevenir les chocs électriques ne pas

utiliser cette fiche polariseé avec un prolonga-

teur, un prise de courant ou une autre sortie de

courant, sauf si les lames peuvent être insérées

à fond sans laisser aucune pariie à découvert.

13. Grounding or Polarization – Do not defeat the

grounding or polarization of the subwoofer.

14. Internal/External Voltage Selectors – Internal

or external line voltage selector switches, if any,

should only be reset and re-equipped with a

proper plug for alternate voltage by a qualified

service technician.

15. Cleaning – Clean with a dry cloth only.

16. Where the mains plug or an appliance coupler

is used as the dissconnect device, the disconnect

device shall remain readily operable.

This apparatus does not exceed the Class A/

Class B (whichever is applicable) limits for radio

noise emissions from digital apparatus as set

out in radio interference regulations of the

Canadian Department of Communications.

ATTENTION – Le présent appareil numérique

n’émet pas de bruits radioélectriques dépassant las

limites applicables aux appareils numériques de

class A/de class B (selon le cas) prescrites dans le

règlement sur le brouillage radioélectrique édicté

par les ministere des communications du Canada.

WARNING–To reduce the risk of fire or electric

shock, do not expose this component to rain or

moisture.

Congratulations on your purchase of an

NXG NX-PROSUB125/NX-PROSUB300

powered subwoofer. It will give your stereo

system unparalleled low frequency output.

Bass frequencies are critical to realistic

sound reproduction. After you’ve hooked

up your NX-PROSUB125/NX-PROSUB300

subwoofer, you’ll discover just how much

“punch” and depth you’ve been missing.

No matter what kind of music or videos

you listen to... whether you listen to it loud

or soft, you’ll experience sound that’s rich-

er and fuller. Bass guitar and string bass

will have more impact. You’ll be able to

FEEL as well as hear percussion – just the

way you would at a live performance. If you

have an audio/video system, movies will

come alive with thunderous sound effects

that were never possible without the NX-

PROSUB125/NX-PROSUB300.

The NX-PROSUB125/NX-PROSUB300 is a

self-powered subwoofer that frees your

receiver or power amplifier from the power

demands of reproducing very low frequen-

cies. To do this, the NX-PROSUB125/NX-

PROSUB300 incorporates its own built-in

crossover system that automatically

“assigns” lower frequencies to its own

power amplifier, contained within the sub-

woofer enclosure.

The NX-PROSUB125/NX-PROSUB300 has

been meticulously designed and tested to

insure high performance, durability and

longevity.

This manual is designed to take you step-

by-step through the hook-up and operating

process. This procedure is not difficult, but

it IS slightly different than hooking up a

line level component such as a cassette

deck or DVD player. Reading this manual

carefully will insure that you get maximum

performance from your NX-PROSUB125/

NX-PROSUB300.

A. UNPACKING . . . . . . . . . . . . .3

B. NX-PROSUB125/NX-PROSUB300

AMPLIFIER PANEL TOUR . . . . .3

C. PLACEMENT . . . . . . . . . . . . .4

D. HOOKUP . . . . . . . . . . . . . . .4

E. INITIAL LISTENING TESTS . . . . .

& ADJUSTMENTS . . . . . . . . . .7

F. SPECIFICATIONS . . . . . . . . . .7

G. TROUBLESHOOTING &

SERVICE . . . . . . . . . . . . . . .8

H. WARRANTY . . . . . . . . . . . . .8

SAFETY INSTRUCTIONS TABLEOF CONTENTS

FIG. 1A - NX-PROSUB125 rear panel FIG. 1B - NX-PROSUB300 rear panel

A. UNPACKING

Remove the NX-PROSUB125/NX-PROSUB300 from its packing

carefully and inspect it for any shipping damage. If you discover

damage, contact your NXG dealer or installer immediately.

If possible, save the carton and internal packing. It’s the best

possible protection for your NX-PROSUB125/NX-PROSUB300 if

you need to move it or return it for service.

Keep your sales receipt in a secure place. It helps establish the

duration of your warranty and is good for insurance purposes (just

in case anything happens to your stereo/home theater system).

B. AMPLIFIER PANEL TOUR

As a starting point, set the control around 80 Hz. if you are using

left and right tower speakers, 100 Hz. with bookshelf speakers, and

120 Hz. with small mini-speakers.

4. POWER/AUTO ON SWITCH. This slide switch turns the

NX-PROSUB125/NX-PROSUB300 on and off. When this switch is

in the AUTO ON position, the amplifier will stay turned on as long

as a signal is being fed to the subwoofer amplifier. 15 to 20 min-

utes after you stop playing music or a video, the amplifier goes into

STANDBY mode – see (2). When you again begin to play music or

a video, the amplifier will automatically turn on.

5. PHASE SWITCH. This switch is used to set the subwoofer’s

phase to either normal “0°” or reverse “180°” (out of) phase. Once

you determine the placement of the NX-PROSUB125/NX-PRO-

SUB300, you will need to try both positions of this switch for the best

bass output for your listening position. The physical location of your

subwoofer and main speakers determines the phase setting that will

sound best at your main listening position. If this requires using the

“180°” mode, don’t worry, there is nothing “abnormal” about it.

6. LFE/LOW LEVEL IN. This connection is used ONLY if you have a

Dolby Pro Logic or Dolby Digital receiver/integrated amplifier

which has a subwoofer output.

7. FROM RECEIVER HIGH LEVEL IN. Connects to your receiver’s

speaker terminals. These color-coded connectors are used to hook

the NX-PROSUB125/NX-PROSUB300 to your receiver if it does not

have sub- woofer out or LFE output connections. This is explained

in item 6 above.

8. REMOVABLE FUSE HOLDER. By pushing in and turning counter-

clockwise, you can remove and replace the fuse. Check the rating

on the fuse for proper size of your unit.

Before actual hookup, you should familiarize yourself with the con-

nections on the back of the NX-PROSUB125/NX-PROSUB300, as

shown in Figs. 1A and 1B above.

1. VOLUME CONTROL. Rotating this knob clockwise increases

the output level of the subwoofer. To start out, make sure that the

VOLUME is turned all the way down (fully counterclockwise).

Later, after some initial listening tests, you can adjust the volume

to your own tastes. However, care should be taken not to overdrive

the subwoofer to the point of audible distortion.

2. POWER INDICATOR. When the amplifier is ON, this indicator

will be green. When the amplifier is in the OFF or STANDBY mode,

the indicator is off.

3. CROSSOVER FREQUENCY CONTROL. This control determines

what lower part of the frequency spectrum will be reproduced by

the NX-PROSUB125/NX-PROSUB300. It is a “crossover” control.

Rotating the knob sets the point where all lower frequencies will be

handled by the subwoofer.

123456

Connecting to a wall plug

The NX-PROSUB125/NX-PROSUB300 draws

a moderately high amount of current. We

do not recommend plugging it into a “con-

venience” outlet (switched or unswitched)

that is often found on the back of receivers

and other stereo components.

Instead, connect the subwoofer ONLY to its

own AC outlet. See items 7 and 8 in the

Safety Instructions on page 2 of this manual.

D. HOOKUP

Two basic connection options

1. Amplifier/speaker hookup If you own a

receiver or integrated amplifier that does

NOT have a subwoofer output or LFE out-

put, use Method A -Amplifier Wiring

Hookup as shown in Fig. 3 (page 5). To

determine whether your receiver has a sub-

woofer output, look on the back for an

RCA-type connector labeled subwoofer out

or LFE out. If your receiver or integrated

amplifier doesn’t have a subwoofer or LFE

output, use Method A - Amplifier Wiring

Hookup Steps for Most Receivers (Fig. 3).

2. Line level hookup If you own a receiver

or integrated amplifier with a subwoofer or

LFE output, you would use Method B - Line

Level Hookup as shown in Fig. 4 (page 6).

C. PLACEMENT

Where to position your NX-PROSUB125/NX-PROSUB300

The NX-PROSUB125/NX-PROSUB300 operates at low bass frequencies which are essentially

omni-directional. That means you can place the NX-PROSUB125/NX-PROSUB300 almost

anywhere in a room without compromising the effectiveness of your main stereo speakers.

Four factors need to be considered: 1) distance from your main speakers;

2) distance from a wall outlet;

3) distance from your receiver; and

4) proximity to walls and corners.

1. Distance from your main speakers. The best placement for your subwoofer is on the

same wall as the main speakers, especially if you are matching up with small bookshelf

speakers. With tower speakers, side wall or rear placement is also acceptable.

2. Wall outlet. Since the NXG subwoofer requires AC power, it must be placed where it

will reach a wall outlet. We don’t recommend extending that range with an extension cord.

3. Connections to your receiver, integrated amplifier or preamplifier. If your receiver or

integrated amplifier does not have a subwoofer output or LFE output (see next page),

hookup between the amp and NX-PROSUB125/NX-PROSUB300 will be made with speaker

wire. You can basically place the NX-PROSUB125/NX-PROSUB300 anywhere in a normal-

sized room.

4. Proximity to walls and corners. Physical placement of the subwoofer will have a definite

impact on the frequency response and the perceived amount of NX-PROSUB125/NX-PRO-

SUB300 bass output. Because low frequencies have long wavelengths, they are influenced

by proximity to a boundary such as a wall or floor.

See Fig. 2. When you place the NX-PROSUB125/NX-PROSUB300 well away from a wall,

it will produce bass at a certain level. Move the subwoofer close to the wall, it will produce

more output (about 3dB more). Putting the subwoofer in a corner will increase output

another 3dB (6dB more than when placed away from walls and corners).

All this technical jargon may sound confusing, but it basically means that you have a

number of options, each of which produces a different amount of bass. For example, if

you like a lot of heavy bass, consider putting the NX-PROSUB125/NX-PROSUB300 into a

corner. If you like smoother, less-obvious bass, move the subwoofer out into the room.

The main thing to remember is that there is no “right” or “wrong” place to put the NX-

PROSUB125/NX-PROSUB300. It all depends on how much bass you want.

Another reason to experiment – because low bass waves are very large (up to 40 feet or

more across!), they tend to cancel and reinforce each other, causing places in the room

where there is lots of bass and others where there isn’t very much at all. If you walk

around your listening room while playing music, you’ll probably discover these sorts of

areas where bass is either exaggerated or reduced. Needless to say, if your main listening

area ends up in a “dead” space, you will need to move the NX-PROSUB125/NX-PRO-

SUB300 so that bass is more normal.

Incidentally, moving the NX-PROSUB125/NX-PROSUB300 around won’t affect the stereo

imaging of your main stereo system, so feel free to try various subwoofer positions.

FIG. 2 - NX-PROSUB125/NX-PROSUB300 placement

Speaker wire tips

If you are using Method A as shown in Fig.

3, here are some suggestions that will insure

proper operation:

Speaker wire type. The choice of speaker

wire is dependent on the type of amplifier,

the distance you intend to run the wire, and

your budget. In general, you should not use

extremely thin wire. If in doubt as to what

brand or type of wire to use, consult your

audio dealer.

Length of speaker wires. When hooking up

your main/satellite speakers, make the

hookup wires the SAME LENGTH for BOTH

speakers, even if one speaker is much clos-

er to your amplifier than the other. You may

need to loosely coil up part of one chan-

nel’s wire behind the amplifier if one speak-

er is quite close and the other far away

from the amp or receiver. But it’s worth it.

Keeping both wires the same length will

help maintain proper signal balance and

imaging. Likewise, when making connec-

tions between your receiver and the NX-

PROSUB125/NX-PROSUB300’s FROM

RECEIVER terminals, make sure that the

wire lengths are the same.

Away from walls:

Normal bass

Against walls:

More bass

In corner:

Most bass

Establishing polarity. It is very important

that left and right connections be made with

the same plus/minus polarity.

• Most speaker wire is polarity coded. This

means that each conductor is labeled either

“+” positive or “–” negative. The (+) posi-

tive conductor may be a different color or

texture than the (–) negative conductor. For

example, it may be copper-colored (instead

of silver-colored), have a white stripe print-

ed on it, have a series of fine ridges

stamped in it or simply be labeled with little

“+” marks.

• NX-PROSUB125/NX-PROSUB300 FROM

RECEIVER terminals are color-coded: Red

for positive (+) and black for negative (–).

• Any connection that uses speaker wire

requires care in maintaining polarity. When

connecting speakers or a subwoofer to

speaker terminals, or during NX-PRO-

SUB125/ NX-PROSUB300 Method A

Hookup, make sure to connect “+” wires to

“+” terminals, and “–” wires to “–” termi-

nals. For example, if your speaker wire has

one copper-colored conductor and one sil-

ver-colored conductor, connect both ends of

the copper-colored wire (+) to red (+) ter-

minals. Likewise, connect the wire you’ve

identified as negative (in this case, the sil-

ver-colored wire), to black (–) terminals.

Preparing speaker wire

1. Separate the two conductors that make

up each wire for a distance of about one

inch. Then strip off 1/2˝ of insulation

from both ends of each con-

ductor using a wire stripper,

diagonal pliers or knife.

2. Twist each set of thin wires into

a tightly bunched spiral. If your

wire is exceptionally thick (12-

gauge zipcord or special speaker

interconnect cable), divide the

strands into three equal bundles and

twist each into a spiral.

FIG. 3 - Hookup for Receivers and Integrated Amplifiers

without a Subwoofer Output

RECEIVER OR INTEGRATED AMPLIFIER

FRONT

SPEAKERS

LEFT RIGHT

COLOR

TOP

SHAFT

STRIPPED

END (1/2˝) WIRE

To connect wire:

1. Unscrew (counter- clockwise) the top

(color portion)

2. Place the stripped metal wire in the hole

in the metal shaft

3. Tighten (clockwise) the top (color portion)

back down on wire (make sure wire

insulation is not under the plastic nut).

FRONT LEFT

SPEAKER

FRONT RIGHT

SPEAKER

NX-PROSUB125 &

NX-PROSUB300

Speaker Wire

Connection Detail

loosen

tighten

(Refer to Fig. 3 above)

1. IMPORTANT:Make sure that ALL stereo system components

including the NX-PROSUB125/NX-PROSUB300 are turned OFF

before proceeding.

2. Following the prior instructions on this page, strip and twist

TWO lengths of speaker wire that will reach between your receiver’s

left and right speakers terminals and the NX-PROSUB125/NX-PRO-

SUB300. Make these two lengths of wire only as long as is neces-

sary to run between the two components.

3. Connect one speaker wire to the RIGHT “+” and “–” speaker

terminals of your receiver or integrated amplifier. Then connect the

other end of this speaker wire to the RIGHT “+” and “–” FROM

RECEIVER terminals on the back of the NX-PROSUB125/NX-PRO-

SUB300. Use the tips on determining speaker wire polarity to make

sure that “+” is connected to “+” and “–” is connected to “–”.

4. Connect the other speaker wire to the LEFT “+” and “–” speaker

terminals of your receiver or integrated amplifier. Then connect the

other end of this speaker wire to the LEFT “+” and “–” FROM

RECEIVER terminals on the back of the NX-PROSUB125/NX-PRO-

SUB300. As in step 3, double check “+” and “–” polarity.

5. Connect your main/satellite speakers to your receiver as shown in

Fig. 3.

6. You are now ready to put your NX-PROSUB125/NX-PROSUB-

300 subwoofer into use. Skip to “E – INITIAL LISTENING TEST.”

Method A:

Amplifier wiring hookup steps for receivers or surround sound receivers with NO sub output jack

FIG. 4 - Hookup for Surround Sound Receiver with a Subwoofer Output

(Refer to Fig. 4 below)

Note: This connection method is only for receivers that have a sub-

woofer or LFE output. If your receiver does not have a subwoofer or

LFE connection as shown in Fig. 4, use Method A – Amplifier Wiring

Hookup Steps for Most Receivers on page 5. You will need one line

level RCA to RCA connector cable long enough to reach from your

receiver to your NX-PROSUB125/NX-PROSUB300 location. This

should be available from your NXG dealer or from radio supply stores.

1. IMPORTANT:Make sure that ALL stereo system components

including the NX-PROSUB125/NX-PROSUB300 are turned OFF

before proceeding.

2. Locate the subwoofer or LFE output connector on the rear of your

receiver and connect one end of the RCA line level cord to it.

3. Route the line cord to the subwoofer location (trying to minimize

areas where it may be stepped on) and connect the other end

directly to the LFE/LOW LEVEL INPUT.

4. Connect your main (and surround speakers if applicable) to the

receiver according to the receiver’s owner’s manual.

5. Note: If you are using a Dolby Digital type receiver with built-in

crossover, you must set the crossover frequency in your receiver

(check your receiver’s owner’s manual). Set the subwoofer’s cross-

over to 180 Hz.

6. You are now ready to put your NX-PROSUB125/NX-PROSUB-

300 subwoofer into use. Skip to “E – INITIAL LISTENING TEST.”

Method B: Line level hookup steps for receivers with subwoofer connections

FRONT

SPEAKERS

RIGHT LEFT

REAR

SPEAKERS

RIGHT LEFT

CENTER

SPEAKERS

RIGHT LEFT

SUBWOOFER

OR LFE

OUT

SURROUND SOUND RECEIVER

NOTE:

SEE ITEM 5 ABOVE FOR

PROPER RECEIVER

TYPE SWITCH SETTING

It’s now time to introduce the NX-PROSUB-

125/ NX-PROSUB300 amplifier’s potent and

plentiful bass into your listening environment.

1. Double-check all connections.

2. Make sure that the volume controls on

both the NX-PROSUB125/NX-PROSUB300

and your receiver/integrated amp/preamp

are turned all the way down (fully counter-

clockwise). Set the PHASE switch to nor-

mal. Set the CROSSOVER FREQUENCY

knob to 80 Hz for normal operation, or to

180 Hz for Dolby Digital operation where the

proper crossover frequency is set in the

receiver’s crossover.

3. Turn on your stereo/home theater system.

THEN turn on the NX-PROSUB125/NX-

PROSUB300. Confirm that the subwoofer’s

green POWER indicator is glowing. If it

isn’t, check the power connections between

the NX-PROSUB125/NX-PROSUB300 and

the wall socket.

4. Play a musical selection that you are

familiar with. Pick a song that has regular

low bass beats. Advance the receiver/inte-

grated amp/preamp’s volume control up to

a normal listening level. If you don’t hear

sound through your main speakers, turn off

the system and check connections. Also

consult the troubleshooting tips on page 8.

5. If sound is indeed coming out of your

main speakers, turn the NX-PROSUB-

125/NX-PROSUB300’s VOLUME control

clockwise until you hear noticeable addi-

tional bass. If you don’t hear bass by the

time you have advanced the subwoofer’s

VOLUME control halfway, turn off the sys-

tem and check connections. Also consult

the troubleshooting tips on page 8.

6. Adjust the NX-PROSUB125/NX-PRO-

SUB300’s VOLUME control until you are

satisfied with the amount of bass. You may

want to try several different albums, tapes

or compact discs while determining how

high to adjust the NX-PROSUB125/NX-

PROSUB300’s VOLUME. The amount of

bass varies from CD to CD and between dif-

ferent types of music.

7. Now that you have adjusted the quantity

of bass via the volume, it’s time to work on

the quality of the bass with the

CROSSOVER FREQUENCY control, PHASE

switch – and experimentation with NX-PRO-

SUB125/NX-PROSUB300 room position.

• While playing music, move the subwoofer

around, in and out of corners, closer and far-

ther from the wall, etc. as much as the power

cord and other connections will allow.

• Change the PHASE switch back and forth

from NOR to REV while someone sits in

the main listening position. Leave the switch

in the position where you like the bass most.

• Change the CROSSOVER FREQUENCY

control (for Dolby Pro-Logic receivers) to

higher and lower settings. If the CROSS-

OVER FREQUENCY control is set too high,

you’ll start to hear low midrange (voices

and instruments) through it. This will neg-

atively affect the stereo imaging of your

main speakers. Back the CROSSOVER FRE-

QUENCY setting off until you hear only

bass from the NX-PROSUB125/NX-PRO-

SUB300. If the CROSSOVER FREQUENCY

control is set too low, you simply won’t get

much output from the subwoofer. Move it

back closer to 80Hz.

8. After you are satisfied with the output of

your NX-PROSUB125/NX-PROSUB300, you

can make all your volume settings through

your main stereo system’s volume control.

The only time you might want to re-adjust

the NX-PROSUB125/NX-PROSUB300’s VOL-

UME is when you encounter a musical selec-

tion that has abnormally low – or high – bass.

You can leave the NX-PROSUB125/NX-PRO-

SUB300 turned on and in AUTO ON mode

when not in use. It does not draw much power

in this state and will be ready to add low bass

the moment you begin to play music.

Remember, you don’t have to do anything

except leave the POWER switch in the AUTO

ON position. The NX-PROSUB125/NX-PRO-

SUB300 will automatically go into STANDBY

mode after 10 to 20 minutes, when no

music is playing.

If you’re not using your stereo system for a

long period of time (such as when you’re

on vacation), turn the POWER switch to the

OFF position.

Caring for Your

NX-PROSUB125/

NX-PROSUB300

The NX-PROSUB125/NX-PROSUB300

enclosure is finished in a very high-quality

polymer laminate covering that is both

attractive and excellent protection for the

wood cabinet. To remove dust, finger

prints, and light water marks you can use a

soft, dry cloth. Never use a solvent like

paint thinner, keytone, gasoline, MEK,

lighter fluid, etc., on the enclosure surface

or it will cause permanent damage.

E. INITIAL LISTENING TEST

NX-PROSUB125/NX-PROSUB300

Power Output

NX-PROSUB125: 125 watts

NX-PROSUB300: 300 watts

Design

Bass Reflex (Front-Ported), Front-Firing

Woofer

NX-PROSUB125:

10˝ Reinforced Fibrous Pulp Cone

NX-PROSUB300:

12˝ Reinforced Fibrous Pulp Cone

Sensitivity

NX-PROSUB125: 92 dB

NX-PROSUB300: 94 dB

Frequency Response

NX-PROSUB125: 25Hz - 180Hz Variable

NX-PROSUB300: 22Hz - 180Hz Variable

Impedance

8 ohms

Controls

Power, Volume, Auto Shut Off, Phase,

Crossover Frequency

Input Options

Speaker Level & LFE/RCA Line Level

Shielded

Dimensions

NX-PROSUB125: 153/4˝ H x 117/8˝ W x 147/8˝ D

(400 mm H x 302 mm W x 378 mm D)

NX-PROSUB300: 161/2˝ H x 15˝ W x 157/8˝ D

(419 mm H x 381 mm W x 403 mm D)

Finish

Black Woodgrain

F. SPECIFICATIONS

G. TROUBLESHOOTING & SERVICE

Before returning your NX-PROSUB125/NX-PROSUB300 for service,

you can save time (and often embarrassment) by checking for a few

problems that are most often encountered.

Power light is not lit. No sound.

1. Is your NX-PROSUB125/NX-PROSUB300 plugged in to a live AC

wall socket?

2. Is the power switch on?

3. Has the NX-PROSUB125/NX-PROSUB300 overheated and shut

off temporarily?

4. Is the fuse OK?

No sound from either set of speakers.

1. Are your other components turned on?

2. Is the receiver or preamp set to the appropriate input and is

that sound source playing?

3. Do you have an unconnected tape monitor selected?

4. Is the NX-PROSUB125/NX-PROSUB300 correctly connected to

your receiver, preamplifier or integrated amplifier and turned on?

Sound comes from main speakers but not subwoofer

1. Is the NX-PROSUB125/NX-PROSUB300 turned on (power light

in the green mode) and VOLUME control turned up?

2. Check the speaker connections for small strands of wire

touching both terminals.

3. Some digital receivers only send a sub out signal when in the

movie or digital mode. In the 2 channel (stereo music) mode, no

sub out signal is sent to the sub.

You may need to set your main speakers to “small” mode in your

receiver setup to get the receiver’s subwoofer output to turn on.

Check your receiver’s owner’s manual for subwoofer operation.

4. For digital receivers – make sure the subwoofer is “ON” and

the subwoofer level is set to “0 dB” or greater.

Sound comes from the subwoofer but not your main speakers

1. If you have used either version of Hookup Method A, check

the connections between your receiver and your main or satellite

speakers.

2. If you have used Hookup Method B (Line Level)...

• confirm that the power amplifier is turned on.

• check the RCA patch cord

• check the speaker wire connections between the receiver and

main or satellite speakers.

Bass is muffled or weak

1. Check speaker wire polarity of all connections.

2. Reposition your subwoofer. At some points in the room, its

output may be cancelled by the geometry of the room. Moving

the NX-PROSUB125/NX-PROSUB300 can eliminate this problem.

Please refer to Item 10 in the Safety Instructions for conditions

that ALWAYS require service by qualified personnel.

If you have tried all the above and still cannot get the

NX-PROSUB125/NX-PROSUB300 to operate properly, consult

your dealer or call NXG Tech Support at 1-800-733-0008.

H. WARRANTY INFORMATION

NX-PROSUB125/NX-PROSUB300

Powered Subwoofer Limited Warranty

If the NXG speaker system proves to be defective in workmanship

or materials within seven years (two years for the electronic ampli-

fier) from the date of the original customer’s purchase, we will, at

our option, repair or replace the defective product.

Limitation of Implied Warranties

Any implied warranties, including warranties of merchantability

and fitness for a particular purpose, are limited in duration to the

length of this warranty.

Exclusion of Certain Damages

NXG’s liability for any defective product is limited to repair or

replacement of the product at our option. NXG shall not be liable

for incidental or consequential damages of any kind or character

because of product defects. Some states do not allow limitations

on how long an implied warranty lasts and/or do not allow the

exclusion or limitation of incidental or consequential damages, so

the above limitations and exclusions may not apply.

This Warranty Does Not Cover:

• Damage caused by abuse, accident, misuse, negligence,

or improper operation.

• Any product whose serial number has been altered, defaced,

or removed.

• Products that have been altered or modified.

• Normal wear and maintenance.

• Damages caused by shipping. (All claims for shipping

damage must be made with the carrier.)

Warranty Service

Warranty service must be performed by an authorized service cen-

ter, usually an NXG speaker systems dealer or its authorized agent.

You may obtain a list of authorized service centers by contacting

NXG. All warranty repairs must be accompanied by the original bill

of sales. No other document is acceptable or is required. This war-

ranty gives you specific legal rights, and you may also have other

rights which vary from state to state.

NXG reserves the right to revise speaker system specifications without notice.

16648 North 94th Street • Scottsdale, AZ 85260

1-800-733-0008 www.nxgtechnology.com

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