NXG Technology NX-PROSUB125, NX-PROSUB300 User Manual

Owner’s Manual

Model NX-PROSUB125

10˝ 125 watt

Powered Subwoofer

Model NX-PROSUB300

12˝ 300 watt

Powered Subwoofer

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SAFETY INSTRUCTIONS TABLEOF CONTENTS

1. Read Instructions – Read all the safety and
operation instructions before operating the NX­PROSUB125/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 sub­woofer 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-PROSUB­125/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, con­venience 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-PRO­SUB125/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

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.

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 prolonga­teur, 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.

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

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 rich­er 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 NX­PROSUB125/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 frequen­cies. To do this, the NX-PROSUB125/NX­PROSUB300 incorporates its own built-in
crossover system that automatically
“assigns” lower frequencies to its own
power amplifier, contained within the sub­woofer 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 step­by-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.

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FIG. 1A - NX-PROSUB125 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

Before actual hookup, you should familiarize yourself with the con­nections 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.

FIG. 1B - NX-PROSUB300 rear panel

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 min­utes 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-PRO­SUB300, 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.