Morel USUB 803 User manual

Morel. Ness Ziona, 70400 Israel.
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Fax: [phone]
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Morel America, Chandler , USA
Toll free number:1-877-667-3511
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E-mail: [email protected]
www.morelhifi.com
Wishing you many years
of sound enjoyment!
User Manual

Unpacking:
Installation Precautions:
Before disposing the packaging, check that nothing is left inside.
Before installing
Moving the unit
Before switching the unit on
Placement
Recycling
Open the box and carefully remove all staples, then remove the subwoofer.
If you notice any defects on any elements during the unpacking process, contact your dealer.
Before connecting your subwoofer, make sure all equipment is switched off. Do not connect the subwoofer power supply cable before
completing all connections.
Always disconnect the power supply cable and any audio cables connected to the subwoofer before moving it. This will prevent a short
circuit or damage to any plugs or connecting cables.
Double check that all connections are correct and that the volume is turned all the way down.
Place the subwoofer in a cool area with sufficient ventilation. Avoid placing in damp area or areas exposed to excessive sunlight or
heat.
Your product contains valuable materials that can be recovered and recycled.
Features:
World Class Digital Amplifier Technology
The USUB powered subwoofer incorporates the latest digital amplifier technology to maximize performance while
generating very little heat. In standby mode, the unit consumes less that 0.5 watts, making it one of the greenest solutions
available.
Tuned System Performance
Rear mounted volume control, low pass crossover, and phase control ensure optimal system integration.
Signal Sensing
When Auto Signal Sense is selected the subwoofer will automatically switch to a power saving stand-by mode if no input
signal is detected for approximately 15 minutes. Power will turn on once again when signal is detected through the input
jacks.
Gold Plated Inputs
For high quality sound and maximum performance.
Cabinet
An attractive furniture quality solid cabinet provides the foundation for high sound quality and clarity.
Subwoofer Placement
A subwoofer provides crucial impact to a home theater system. Low bass frequencies are omni directional, this means
you can usually place your subwoofer just about anywhere in your home theater room with good results.
USUB
USUB
USUB
Option 2
Option 3
Dear Customer,
Thank you for choosing Morel's USUB Subwoofer!
The USUB was engineered to oer high delity sound quality for both stereo and home theater applications. The
information in this manual will help get the best possible performance out of the USUB subwoofer. If you have any
questions, please contact your Morel dealer, or Morel support at
www.morelhi.com
Option 1
WARNING
make sure the power switch selector is set to correct
current BEFORE connecting to power grid - 110v or
220v - if incorrect it may damage the subwoofer !!!

WARNING
make sure the power switch selector is set to correct
current BEFORE connecting to power grid - 110v or
220v - if incorrect it may damage the subwoofer !!!
1.
2.
3.
4.
5.
6.
8.
9.
10.
7.
147mm
210mm
COLOR: PANTONE COOL GRA Y 2C
WARNING
make sure the power switch selector is set to correct
current BEFORE connecting to power grid - 110v or
220v - if incorrect it may damage the subwoofer !!!
Connection & Controls
1. Hi Level Inputs
Speaker wire binding post. Use a high quality speaker wire
to connect Left & Right source outputs to Left & Right
subwoofer inputs. Please observe proper polarity.
2. Power LED
(Red) Standby Mode - (Blue) Power Mode ON
3. Low Level Input
Use for Left/Right connection from audio source.
4. Volume Control
Adjusts subwoofer volume level.
5. Crossover Control
Adjusts the subwoofers frequency output
6. Phase Switch
Allows you to set the phase of the woofer 0-180°
7. Power Mode Switch
Set the power mode ( OFF, AUTO, or ON )
8. Voltage Switch
Select input voltage. Default: 110-120V or 220-240V
9. Master Power Switch
Controls the main power to the subwoofer
10. AC Power Cord
Connect the included AC power cord.
11. Fuse Holder
Master Power Fuse. Includes spare fuse inside holder.
2.
1.
3.
4.
5.
6.
7.
9.
10.
11.
8.
LR
ON
OFF
110-120V~/60Hz
220-240V~/50Hz
POWER
110-120V~,FUSE T6.3AL/250V
220-240V~,FUSE T4AL/250V
110-120 V~
220-240 V~
CAUTION:
DISCONNECT POWER CORD BEFORE CHANGING FUSE.
REPLACE WITH SAME TYPE OF FUSE.
ATTENTION:
DEBRANCHER AVANT DE REMPLACER LE FUSIBLE.
UTILIZER UN FUSIBLE DE RECHANGE DE MÊME TYPE.
AUTO
OFF ON
0 180
PHASE
FREQUENCY
VOLUME
POWER
LOW LEVEL
INPUT
MIN MAX
40Hz 200Hz
HIGH LEVEL
INPUT
LR
COLOR: PANTONE COOL GRAY 2C
Connection & Controls
1. Power LED
(Red) Standby Mode - (Blue) Power Mode ON
2. Low Level Input
Use for Left/Right connection from audio source.
3. Volume Control
Adjusts subwoofer volume level.
4. Crossover Control
Adjusts the subwoofers frequency output
5. Phase Switch
Allows you to set the phase of the woofer 0-180°
6. Power Mode Switch
Set the power mode ( OFF, AUTO, or ON )
7. Voltage Switch
Select input voltage. Default: 110-120V or 220-240V
8. Master Power Switch
Controls the main power to the subwoofer
9. AC Power Cord
Connect the included AC power cord.
10. Fuse Holder
Master Power Fuse. Includes spare fuse inside holder.

Setting & Controls
Setting the Power Mode
ON Mode:
If the subwoofer is set to ON mode, it will always be ready to play. However, undesired noise from interference or
connections changing may be heard. Use the standard ON mode only if needed, set the power switch to OFF when not in
use.
AUTO Mode:
Setting the switch to AUTO enables AUTO Sense. The subwoofer turns ON and OFF automatically in response to signal
input. The subwoofer will enter standby mode if no signal is sensed for longer than 15 minutes.
Set the MODE switch to the ON position for setup.
After making all the connections, setup your subwoofer using the following steps:
1. Plug the subwoofer into an electrical outlet using the included power cord. The status LED will illuminate solid blue
when power is present and the subwoofer is ON.
2. Set the controls and switches to their initial setup positions:
VOLUME set the dial to 50% or 12 o’clock
CROSSOVER adjust the upper frequency limit. The purpose is to control the overlap the upper frequencies of the
subwoofer and the main speakers lower frequencies. Check your main speakers specs to determine their low-end
limit.
PHASE set to 0°
3. Play a movie scene or soundtrack and set the system volume to an average level. Listen to the bass level from your
favorite listening position and adjust the volume accordingly.
4.
for you. Depending on the location of the subwoofer the bass may sound louder and deeper when the phase has been
optimized. In some cases adjusting the phase will have no audible difference.
5. Setup is now complete.
Connection & Controls
1. High Level Inputs (10-12 inch Models Only)
Use for Left/Right connection from audio source.
2. Power LED
(Red) Standby Mode - (Blue) Power Mode ON
3. LFE Input (12 inch Model Only)
Connect to the LFE output on the Receiver/Processor.
4. Low Level Input
Use for Left/Right connection from audio source.
5. Volume Control
Adjusts subwoofer volume level.
6. Crossover Control
Adjusts the subwoofers frequency output
7. Phase Switch
Allows you to set the phase of the woofer 0-180°
8. Power Mode Switch
Set the power mode ( OFF, AUTO, or ON )
9. DSP Mode Switch
Set the DSP ( OFF or ON )
10. Master Power Switch
Controls the main power to the subwoofer
11. AC Power Cord
Connect the included AC power cord.
12. Fuse Holder
Master Power Fuse. Includes spare fuse inside holder.
13. Voltage Switch
Select input voltage. Default: 110-120V or 220-240V
3.
2.
1.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
WARNING
make sure the power switch selector is set to correct
current BEFORE connecting to power grid - 110v or
220v - if incorrect it may damage the subwoofer !!!

Trouble Shooting
The USUB is designed to function trouble free. Most problems that may occur are due to simple issues. Please check
below for a list of simple fixes if you experience any issues.
Ensure that the Status LED is blue and the power switch is ON.
No Sound
1. Verify that audio is coming form the source selected. Select another source to test, or connect the source
directly to the subwoofer input bypassing any other equipment.
2. Ensure that any connected A/V equipment is turned ON and connected properly.
3. Check cable connections for damage, poor connection or shorts.
4. Ensure subwoofer volume is turned up to a reasonable level using the control on the back of the unit.
Interference or undesired noise coming from subwoofer:
1. Check all connections for damage, poor connection or shorts.
2. If the signal cable is installed inside of the wall, it may be running parallel to a high voltage cable. Test the
system by running a separate in room cable. If the issue is resolved, a new cable should be installed with the
proper clearance from high voltage.
3. Common sources of interference include Wi-Fi antennas and devices or cordless phones setup too close to the
subwoofers source.
Cleaning & Maintenance
The exterior of the subwoofer may be cleaned using a soft lint free cloth. If the subwoofer is moved often for cleaning or
relocation, check each time to ensure that connections are not damages or loose.
Specifications:
Spec USUB 1003
Power 500W Dynamic (250WRMS)
Active Woofer 10”
Passive Woofer Dual 10”
Frequency 20-160 Hz
Phase 0-180°
Voltage 100-120V AC / 220-240V AC
Inputs Hi Level / Low Level
Dimensions (WxHxD) 14.6 x 14.6 x 13in
Spec USUB 1003
Power 800W Dynamic (350WRMS)
Active Woofer 12”
Passive Woofer Dual 12”
Frequency 20-160 Hz
Phase 0-180°
Voltage 100-120V AC / 220-240V AC
Inputs Hi Level / Low Level / LFE
Dimensions (WxHxD) 16 x 15.4 x 15 in
Spec USUB 803
Power 300W Dynamic (150WRMS)
Active Woofer 8”
Passive Woofer Dual 8”
Frequency 20-160 Hz
Phase 0-180°
Voltage 100-120V AC / 220-240V AC
Input L&R / Low Level
Dimensions (WxHxD) 10.5 x 10.5 x 11in

DSP Features Set
X-Over Control
Gain Control
SHS Control
Delay Control
Phase Control
Limiter-Compressor Base Control
Limiter-Compressor Detailed Control
Dynamic Bass Base Control
Dynamic Bass Detailed Control
Remote Hardware Control
(Hardware Vr Detailed Settings, Auto On Threshold
Features)
Preset Manager
Preset Import/Export Features
Room Correction
(Group Of Functions For A Minimum Phase For Frequency/
Impulse Response Correction)
SPL Meter
iWoofer App: DSP Discovery & Connect
Open the iWoofer App: Turn On Bluetooth to allow iWoofer to connect to accessories. You may tap Ok, and the app will go
into Demo Mode. Otherwise tap Settings, and turn ON Bluetooth, next tap to Home button, and open iWoofer again.
oofer Hardware, all of them will
appear under “Devices Found:” Choose the UDID or MAC address that show up for your iWoofer equipped sub.
Fig 1. BLE off/on dialog. Fig 2. Discovery window.
Main Menu / Name Change
connecting to the phone or tablet, the app will offer to import preset from hardware. It is a good idea to do so, and just in
case save the preset with an authentic name).
The app has a renaming function in Options/Name menu, and UDID number could be replaced for any name whatever
you like.
X-Over Menu
Fig 5. X-Over menu. Fig 6. Xover menu. Add new PEQ..
Fig 3. Main control menu. Fig 4. Preset name menu.
X-Over - control of Low Pass and High Pass Filters (LPF/HPF), double tap(or tap&hold on > 1S) on the slope to
select one, slide left/right to control a frequency (20:500Hz), and up/down to control an order(2:4:8 or 12/24/48 db/oct
Butterworth).
Also LPF/HPF frequencies limits the frequency range for Room Correction. Xover controls up to 25 bands fully Parametric
EQualizer (PEQ), to add a new PEQ tap to “+” icon, to delete “Trash” icon. Slide right/left to set a frequency, up/down
to set a gain (db), zoom in/zoom out to control a Q factor (PEQ bandwidth), double tap(or tap&hold on > 1S) on PEQ to
select it.
If you intend to use the DPS functions you must first download
the iWoofer app from the App Store or Google Play.
Getting the App

Room Correction Menu
Room Correction - minimum phase FIR based compensation algorithm with 5mS of total latency. iWoofer uses precise
frequency sweep with adjustable time setting (Room Correction/ Settings/ Frequency step delay), to compensate echo’s
delay time.
oofer uses the phone mic with model
related LUT correction, Fast 20:500Hz sweep + FFT analysis. Controls: On/Off (with self-reset to Off position), Optimism
5:15 (more means wider). The function sets HPF and LPF frequencies, and builds preliminary response, as dashed blue.
Auto level function obtains optimal volume level for an accurate frequency response measurement. Controls: On/Off,
Target -30:-8db (-8db means louder).
Fig 7. Room correction menu. Fig 8. Room correction settings menu.
Get Response
Get Response function using a combination of the phone’s mic signal (corrected by model related LUT) to build frequency
response plot across the slow and accurate sweep within HPF to LPF range. The function builds a THD plot as well, as
an easy way to see if high distortion levels affect an accuracy. The last one is a frequency response plot that could be set
as Reference by double tap on that plot or tap & hold > 1S, slide up/down on the Compensate/Resp window to adjust a
smoothness.
Fig 9. Response&Compensation window.
Fig 10. Response&Compensation window after response.

Compensate
The Reference
Shape could be an exact copy of Near Field response (even copy of another subwoofer’s response if a user wishes,
furthermore – the preset saves all parameters data + ref. shape, so one user can export it with preset by email, another
user may receive the preset and build a copy of this response on his own subwoofer) or simply horizontal line 0db,
depends on smoothness.
Controls: Frequency step delay 50:1000mS (a large hall may need a longer delay to compensate echo’s decay time),
Reference Shape Smoothness 0:100% (the target curve becomes 0db line if Smoothness = 100%), Max Boost 0:10db.
Fig 12. Result response after compensation
SPL Meter
SPL Meter is a simple FFT visualization instrument for checking and manual tweaking of frequency response.
Controls: White Noise generation On/Off. Peak hold reset by windows change. For instance, go to X-Over window and
back again to the SPL Meter to reset Peak Hold data.
Fig 13. SPL meter window.

Wizard Overview
Wizard is the automation script leading through the Room Correction process step by step. First, the Wizard offers to turn
On a sub, and adjust volume knob, on the rear panel. Next move the sub away from walls, ideally in the center of a large
Why NF? Because it is the way to get a reasonable and safe frequency range of the particular subwoofer. During 1-2
seconds you’ll hear a few fast sweeps (Auto-level and Auto-range recognition), and you’ll see a message with the choice
of correction types.
Fig 14. Start wizard window.
Fig 15. Choice of correction type window.
Boomy Region Compensation
from 70Hz and higher, and keep original subwoofer punch energy. A typical subwoofer always designed as a compromise
between box+speaker size and lowest audible frequency SPL (Sound Pressure Level) performance in a typical room.
The same room, which may produce ugly boomy coloration in the midbass, for sure doing serious SPL
+5:15db within 20-40Hz. In terms of power, it’s a huge advantage, +10db equals to x10 watts - 500W vs 5000W! So we
believe it’s better to keep lowest frequencies as they are and linearize only midbass, boomy region to make the bass more
tolerance. IOS devices use a modern MEMS mics with very good consistency of frequency response, especially higher
50-70Hz. So this is a practical approach, but for enthusiasts, we offer 3rd correction type i.e. entire range correction or
even go to “low level” Response/Compensation menu to get the control on a lot of parameters.
Please keep reading the app’s hints (!), which contains info about many, if not for all, functions.
Fig 17. Boomy region correction is complete.
Fig 16. Start Boomy region correction.

Near Field Compensation
to how your subwoofer sounds in the ideal room aka no echo chamber.
Don’t be surprised if it sounds too dry, ideal world is supposed to be boring, and above we’ve explained why ;)
value is measured).
Options Menu
Name:
connected iWoofer Hardware.
Restore Factory Setting: In case you want to reset all parameters to defaults. Be aware that this defaults is not exactly
hardware will offer app to import preset from DSP, this one is the manufacturer’s default preset.
Change Pairing Code: let you to set a password to you subwoofer/app. In case if the password is forgotten, please press
and hold the Pair button on the rear panel of your subwoofer during 3Sec. The subwoofer password will be reset to zero.
Preset Manager allow you to save/load and export presets. Please note that only after saving a preset the subwoofer will
memorize a new parameters. Without saving a preset, subwoofer loses a new parameters after turn Off. Export presets
carried out thru the IOS email account, but the import could work by hyperlink on website.
Fig 21. Preset manager window.Fig 20. Options window.

Options Menu Cont.
HW Controllers
Hardware controllers options lets you to adjust or deactivate up to four knobs or switches on the rear panel of your
subwoofer. For a full control by app, please switch Off all controllers, otherwise turning Off/On of the subwoofer will return
the control to the rear panel knobs.
Auto On/Off allows you to adjust auto On threshold in mVRMS units, and hold On time in minutes. 10mVRMS and 2
minutes are default values.
Fig 23. Auto on/off window.Fig 22. HW controllers window.
Options Menu Cont.
Gain Slider: The volume slider with Input Level indication (gray/green/red means, signal is less/more than Auto On
Threshold, or input clipped).
SHS: Sub Harmonic Synthesizer (old tracks bass restoration, good example is Jackson Sisters - I Believe In Miracles
or Diana Krall - Temptation). Controls: dry/wet 0:100%. Brings a lot of tectonic punch, better if the limiter is On, ideal for
closed box subwoofers.
Delay Controls: 2.5:65mS or 5:67.5mS for the FIR room correction mode (latency 2.5/5mS). Sometimes needed to
match delay with full range speakers if delayed.
Phase:
point.
Fig 25. Main window (continuation).Fig 24. Main window.

Options Menu Cont.
Limiter Compressor (RMS detector type), better to turn up the sound during adjustment, but if you need kind of “classical
limiter”, try to set Pre-gain to 0db and Decay for 10-20db/S. In case of “auto-level”, set Pre-gain to +12db and slowdown
Decay to 2-5db/S. Faster Decay could be suitable rather for a club’s subwoofers. The Attack time at max db/S in most
cases.
Dynamic Bass is one more dynamic processing algorithm aka band compressor, you can adjust the frequency range,
bass boost and threshold for the effect.
Fig 27. Dynamic Bass window.Fig 26. Limiter-Compressor window.