Monoprice 9723 User manual

Monoprice™

POWERED SUBWOOFER

P/N 9723 |P/N 8248

User Manual

SAFETY WARNINGS AND GUIDELINES

Please read this entire manual before using this device, paying extra attention to these safety warnings

and guidelines. Please keep this manual in a safe place for future reference.

•This subwoofer is intended for indoor use only.

•Do not expose this subwoofer to water or moisture of any kind. Do not place drinks or other

containers with moisture on or near the device. If moisture does get in or on the unit,

immediately unplug it from the power source and allow it to fully dry before reapplying power.

•Do not touch this subwoofer, the power cord, or any other connected cables with wet hands.

•Do not expose this subwoofer to excessively high temperatures. Do not place it in, on, or near

heat sources, like a fireplace, stove, radiator, etc. Do not leave it in direct sunlight.

•Do not place or install this subwoofer in an area where it can be exposed to excessive amounts

of dust, humidity, oil, smoke, or combustible vapors.

•Prior to operation, check the unit and power cord for physical damage. Do not use it if physical

damage has occurred.

•Before plugging the unit into a power outlet, ensure that the outlet provides the same type and

level of power required by the device.

•Unplug this subwoofer from the power source when not in use.

•Take care to prevent damage to the power cord. Do not allow it to become crimped, pinched,

walked on, or become tangled with other cords. Ensure that the power cord does not present a

tripping hazard.

•Never unplug the unit by pulling on the power cord. Always grasp the connector head or adapter

body.

•Ensure that power is turned off and disconnected before making any electrical connections.

•Do not use chemical cleaners or solvents to clean these mounts. Use only a soft cloth that’s

slightly moistened with warm water.

•This subwoofer has no user-serviceable parts. Do not attempt to open, service, or modify it.

3 
TABLE OF CONTENTS 
SAFETY WARNINGS AND GUIDELINES ................................................................................................................2 
PACKAGE CONTENTS ............................................................................................................................................3 
150W POWERED SUBWOOFER (9723) OVERVIEW ..............................................................................................4 
PLACEMENT & POSITIONING................................................................................................................................5 
SETUP & ADJUSTMENT..........................................................................................................................................5 
WIRING & CONNECTIONS.....................................................................................................................................6 
TECHNICAL SPECIFICATIONS................................................................................................................................6 
60W POWERED SUBWOOFER (8248) OVERVIEW...............................................................................................7 
PLACEMENT & POSITIONING................................................................................................................................8 
SETUP & ADJUSTMENT..........................................................................................................................................8 
WIRING & CONNECTIONS.....................................................................................................................................9 
TECHNICAL SPECIFICATIONS................................................................................................................................9 
CUSTOMER SERVICE............................................................................................................................................10 
TECHNICAL SUPPORT..........................................................................................................................................10 
REGULATORY COMPLIANCE...............................................................................................................................10 
 NOTICE FOR FCC .............................................................................................................................................10 
 NOTICE FOR ISED CANADA ............................................................................................................................11 
DISPOSAL AND RECYCLING INFORMATION......................................................................................................11 
 
 
 
PACKAGE CONTENTS 
Take an inventory of the package contents to make sure you have all the items listed below. 
Please contact Monoprice Customer Service for a replacement if anything is missing or damaged. 
•1x Powered Subwoofer 
•1x User Manual 
 
 
 
 
 
 
 
 
 
 
 
 

150W POWERED SUBWOOFER (9723) OVERVIEW

1. Power Switch –This 2-position switch

controls the power status of the subwoofer.

OFF: Turns the unit off. ON: Turns the unit on

regardless of whether a signal is present or

not.

2. Subwoofer Crossover –This rotary control

adjusts a variable low pass filter to set the

upper frequency at which the output of the

subwoofer begins to roll off. Continuously

variable from 50 Hz, it matches the upper-

frequency characteristics of the subwoofer to

the low-frequency response of the main

stereo speakers.

3. Line Level Input –These RCA phono jacks

accept a line-level, full-range signal from the

pre-amplifier output of a receiver or pre-

amplifier. This full-range signal is processed

and amplified to power the subwoofer.

4. Speaker Level Input –These spring-loaded terminals accept a stereo, speaker-level, full-range signal

from a receiver or power amplifier. This signal is processed and amplified to power the subwoofer.

5. Fuse –For continued protection, always replace the fuse with the same type and size listed.

6. Level Control –This rotary control adjusts the volume level of the subwoofer and is used to balance

its volume with that of the main stereo speakers.

7. Status LED –This light-emitting diode shows the status of the subwoofer electronics. "Red" indicates

that the amplifier is plugged in and the power switch is on.

8. Auto ON Switch –In order to function, the Power switch must be turned on, as indicated by the red

color of the LED. With the Auto ON Switch in the

position, the subwoofer is on at all times and

ready to play programmed material. If the Auto ON Switch is in the

Auto ON

position and no audio

signal is received, the subwoofer will go into

Standby Mode

to conserve power. When an audio signal

is detected, the subwoofer will switch itself into the fully ON mode and begin playing the

programmed material. After about 2 minutes during which no signal is detected, the subwoofer will

return to

Standby Mode

NOTE: If you plan to be away for an extended time or if the subwoofer will not be used, you may want

to turn off the Power Switch.

PLACEMENT & POSITIONING

Your new subwoofer will work well in a variety of locations. However, its placement in your listening

room will affect its performance.

Because of their longer wavelengths, low-frequency sounds tend to be omnidirectional. This means that

the location of the subwoofer in relation to the left and right channels will not affect the directional cues

you receive from the mid-range and high-frequency sounds from the main speakers.

Because of the way that sound waves are reflected and spread within a room, what you hear will be a

combination of direct sound from the speaker and reflected sound off your walls, floor, ceiling, etc. —

sometimes in phase and sometimes out of phase. So, while placement will not affect left/right channel

location cues, it will affect the volume and quality of the sound.

In general, placing the subwoofer in a comer will tend to increase its audible presence but can produce a

somewhat uneven sound level. Placing it next to a wall will slightly decrease the peak presence but will

smooth out the sound levels. Placing it in the middle of the room will produce the smoothest sound

levels but will also result in the lowest overall presence.

No matter where you choose to place the subwoofer, it will be a compromise between volume level and

smooth response. You should experiment with various locations by listening to familiar audio material

with substantial bass content until you find the location that sounds best to your ears and fits in with

your room's overall setup.

SETUP & ADJUSTMENT

After you have selected an initial location for your subwoofer and have connected it to your system, turn

on some audio material with substantial bass content. Sit in your normal listening position and make the

following adjustments. NOTE: This will be much easier if you can have someone else make the

adjustments for you as you listen to your sound system:

1. If you are using the line level inputs and your main speakers are receiving a full range signal, set the

subwoofer crossover frequency control to its full counterclockwise position of 50 Hz.

2. Set the gain control fully counterclockwise to the "minimum" position.

3. Tum off the loudness control and set the bass tone control on your main amplifier to the flat position.

4. Use familiar programmed material that has substantial bass content and play your main system at a

moderate volume level.

5. Slowly rotate the subwoofer level control clockwise until a good balance is achieved between the

low-frequency output of your subwoofer and the mid-range and upper frequencies from your main

speakers.

6. Slowly rotate the subwoofer crossover frequency control clockwise to attain the best blend between

the level of the subwoofer and the main speakers in the mid-range crossover region. Advancing the

control too far will cause "boominess" in the overall sound and will add an unnatural "chesty" quality to

male voices.

WIRING & CONNECTIONS

Turn off all power to your subwoofer and other equipment before making any connections. See the

installation diagram using speaker-level inputs below.

For the installation with A/V amplifiers and receivers that have 5.1 channel line level output, see the

diagram below. NOTE: Use the RCA “Y” adaptor to connect both line-level inputs.

TECHNICAL SPECIFICATIONS

P/N

9723

Speaker Type

High-Performance Powered Subwoofer

Driver

12” Reinforced

Amplifier Power Output

150W (RMS)

Frequency Response

25 Hz ~ 250 Hz

Lowpass Crossover

Adjustable from 50 Hz ~ 150 Hz

Functions

Power (On / Off)

Inputs

Hi-Level (Speaker), Line (RCA)

Dimensions (H x W x D)

17" x 17 ¼" x 17 ½"

Color

Black

60W POWERED SUBWOOFER (8248) OVERVIEW

1. Power Switch –This 2-position

switch controls the power status

of the subwoofer. OFF: Turns the

unit off. ON: Turns the unit on

regardless of whether a signal is

present or not.

2. Subwoofer Crossover –This

rotary control adjusts a variable

low pass filter to set the upper

frequency at which the output of

the subwoofer begins to roll off.

Continuously variable from 45

Hz, it matches the upper-

frequency characteristics of the

subwoofer to the low-frequency

response of the main stereo

speakers.

3. Line Level Input –These RCA

phono jacks accept a line-level,

full-range signal from the pre-amplifier output of a receiver or pre-amplifier. This full-range signal is

processed and amplified to power the subwoofer.

4. Speaker Level Input –These spring-loaded terminals accept a stereo, speaker-level, full-range signal

from a receiver or power amplifier. This signal is processed and amplified to power the subwoofer.

5. Fuse –For continued protection, always replace the fuse with the same type and size listed.

6. Level Control –This rotary control adjusts the volume level of the subwoofer and is used to balance

its volume with that of the main stereo speakers.

7. Status LED –This light-emitting diode shows the status of the subwoofer electronics. "Red" indicates

that the amplifier is plugged in and the power switch is on.

8. Auto ON Switch –In order to function, the Power switch must be turned on, as indicated by the red

color of the LED. With the Auto ON Switch in the

position, the subwoofer is on at all times and

ready to play programmed material. If the Auto ON Switch is in the

Auto ON

position and no audio

signal is received, the subwoofer will go into

Standby Mode

to conserve power. When an audio signal

is detected, the subwoofer will switch itself into the fully ON mode and begin playing the

programmed material. After about 2 minutes during which no signal is detected, the subwoofer will

return to

Standby Mode

NOTE: If you plan to be away for an extended time or if the subwoofer will not be used, you may want

to turn off the Power Switch.