Installation Guide Installationsanleitung Guide d'installation Guía de Instalación Guida all'installazione Installatiehandleiding Installationsguide Руководство по установке
Contents English ......................................................................................................2
Technical specifications..............................................................................3
Deutsch ..................................................................................................14
Introduction.................................................................................................3
Français ..................................................................................................26
Unpacking...................................................................................................4
Español ...................................................................................................38
Floor spikes ................................................................................................4
Italiano ....................................................................................................50
Positioning ..................................................................................................4
Nederlands .............................................................................................62
Top panel controls ......................................................................................5
Svenska ..................................................................................................74
Display ........................................................................................................5
Русский..................................................................................................86
Bottom panel ..............................................................................................6 Connections................................................................................................6 Remote control/SPL meter .........................................................................8 Operating instructions ................................................................................8 Menu system ..............................................................................................9 Factory reset.............................................................................................10 Acoustic set-up procedure .......................................................................11 SPL measurement graph..........................................................................13
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2
Technical specifications
Introduction Thank you for purchasing this Mordaunt-Short product. The Mezzo 9 subwoofer features a new sophisticated Digital Signal Processor (DSP) preamplifier that allows many adjustments to be made to get the best possible performance whatever your programme choice, main speaker system, or listening environment. The adjustable and pre-settable level, low pass filter slopes and continuously variable phase allow the Mezzo 9 to be matched to a wide range of speaker systems. Twin adjustable notch/boost filters allow room anomalies to be tuned out and a dynamics processing engine allows either enhancement of dynamics for a more punchy movie experience or compression/downward expansion for late night use.
Mezzo 9 Min Sensitivity
275 mV rms required for maximum output with Volume at max.
Max input (Line/LFE)
2 V rms
Max input (Speaker In)
28 V rms
Input impedance (Line/LFE)
10k Ohms
Input impedance (Speaker In)
120k Ohms
Frequency response
30Hz - 200Hz
Drive units
2 x 8" aluminium CPC™ long throw woofers
Crossover
Active/variable
Amplifier power
375W rms
Max power consumption
600W
Standby consumption
8W
Magnetic shielding
Yes
Speaker dimensions (H x W x D)
315 x 338 x 350mm (12.4 x 13.3 x 13.8")
Weight
21.1kg (46.4lbs)
A high efficiency 375 watt amplifier coupled to two 8” CPC bass drivers allow the Mezzo 9 to recreate the bass depth required for both realistic Music and Movie performances. Separate presets may used to allowing you to quickly recall your own settings optimised for different listening requirements. Finally a combined remote control / Sound Pressure Level meter has been designed to make setting up the Mezzo 9 simpler and more accurate. Please do read this guide carefully, as it contains essential information in getting the very best from your new subwoofer.
Matthew Bramble, Mordaunt-Short Technical Director and the Mezzo 9 design team.
3
1. Unpacking Follow the diagrams to carefully unpack your subwoofer. It is quite heavy and it is advisable to have a friend help with unpacking and moving the unit.
kg
Contents: RELATIV E (dB) SPL +9 +8
+18
+7
+16
+6
+14
+5
+12
+4
+10
+3
+8
+2
+6
+1
+4
REF
+2
-1
REF
-2
-2
-3
-4
-4
-6
-5
-8
-6
-10
-7
-12 -14
1dB RANGE
2dB
SPL
MENU
NIGHT
FLAT MOVIE MUSIC GAMES
x4
x4
x4
x3
2. Floor spike Attach the feet to the Mezzo 9 as shown in the diagram. It is recommended to use the metal spikes for carpeted flooring and the
rubber feet for hard flooring or where the spikes might damage the flooring type.
Metal spikes
Rubber feet
3. Positioning See diagrams for some typical set-ups in 5.1/6.1 and 7.1 surround-sound configurations. Your subwoofer can be placed almost anywhere in the room as bass is much less directional than higher frequency sound. However, due to the acoustic effects of the room, experimentation is always recommended. In particular before setting adjustments for room anomalies such as the Notch Filters try to achieve the best performance by changing the position of the subwoofer first. Remember
5.1
4
to adjust only a little at a time and to make only one change between listening tests. Note: For surround-sound use always ensure the correct distances/time delays are entered in the "Loudspeaker Set-Up" page of your home cinema receiver (refer to your home cinema receiver manual for more information) before making any adjustments.
6.1
7.1
4. Top panel controls
5
3 1
6
7 2 4
1
Save/Recall
5
Press the button to recall a previously saved setting (i.e. Preset). Press and hold down the button to save the current set-up. 2
Back
6
Press to return to a previous menu item/function. 3
Selector
Rotate the dial to cycle through the menu item/function.
Infra-red sensor
7
Receives IR commands from the supplied remote control. A clear unobstructed line of sight between the remote control and the sensor is required. 4
Power
Lights up bright when the subwoofer is switched "On" and dim when in standby mode.
Enter
Press to accept the item/function highlighted in the display menu. Also press to turn "On" when in standby mode and press and hold to put into standby mode.
Clip
Flashes when the input to the subwoofer DSP circuitry starts to clip or overdrive which will degrade the sound and more importantly could damage the subwoofer/bass drivers. If this happens turn the volume down on your connected receiver/ amplifier, rather than or the subwoofer itself, this reduces the level at the subwoofer input rather than the output level.
5. Display 1
2
4
5
6 3
1 Notch/Boost filter 1 and 2 active.
4 Units for numeric value.
2 Numeric display for volume etc.
5 Low pass slope.
3 Text display.
6 Phase filter active.
Refer to later sections of this manual for more information about these adjustments and functions.
5
6. Bottom panel 1
2
3
4
OFF
Caution: ber Label Removed
LEFT
RIGHT
HIGH LEVEL IN
POWER AC Active Subwoofer
115V
Caution Risk of electric shock. Do not open.
Max power consumption: 600W
www.mordaunt-short.com
Mains Voltage Selector Switch 115V/230V AC ~ 50/60Hz 6/3A
8
Avis Risque de choc electrique. Ne pas ouvrir.
Achtung Vorm öffnen des gerätes. Netzstecker ziehen.
230V
LEFT
HIGH LEVEL IN
RIGHT
Designed in London, England
ON N2409
AЯ46
OFF 115V
Caution Risk of electric shock. Do not open.
Mains Voltage Selector Switch 115V/230V AC ~ 50/60Hz 6/3A
Avis Risque de choc electrique. Ne pas ouvrir.
Achtung Vorm öffnen des gerätes. Netzstecker ziehen.
230V ON N2409
AЯ46
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference, including interference that may cause undesired operation.
CAUTION FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SPECIFIED FUSE
115V: 6.3AL 250V 230V: 3.15AL 250V
ATTENTION AFIN D'ASSURER UNE PRETECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACERUNIQUEMENT PAR UN FUSIBLE DE INDIQUÉ
7
6
POWER AC Caution: Serial Number Label Removed
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference, including interference that may cause undesired operation.
CAUTION FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SPECIFIED FUSE
115V: 6.3AL 250V 230V: 3.15AL 250V
ATTENTION AFIN D'ASSURER UNE PRETECTION PERMANENTE CONTRE LES RISQUES D'INCENDIE, REMPLACERUNIQUEMENT PAR UN FUSIBLE DE INDIQUÉ
5
1 Line In L/R Phono/RCA cables can be connected here from an amplifiers line level Preamp / Subwoofer output. 2
Line Out L/R
Phono/RCA cables can be connected here to loop the Line In signal onwards to another Subwoofer.
5 High Level Input L/R Speaker cable or other wire can be connected here from an amplifiers high level loudspeaker terminals. The Mezzo 9 presents a high input impedance to the amplifier and can be wired in parallel with the main speakers. The Mezzo 9 will no draw any significant current from the amplifier and so a large gauge speaker cable is not required. 6
3
LFE (Low Frequency Effects)
In - Single phono cable can be connected here from a home cinema receiver’s LFE/Subwoofer output.
Mains Voltage Selector Switch
Switches the mains voltage between 115V and 230V. For use by installer/ dealer only.
Out - Single phono cable can be connected here to loop the LFE In signal onwards to another Subwoofer.
7 Power On/Off Switches the subwoofer on and off.
4 Trigger In - Single cable can be connected here from a device that has a Trigger output. A 5-12V DC trigger input will wake the Subwoofer up from Standby.
8 AC power socket Once you have completed all the connections to the subwoofer, plug the AC power cable into an appropriate mains socket then switch on. Your subwoofer is now ready for use.
Out - Single cable can be connected here to loop the Trigger In signal to another device.
7. Connections Note: Before making any connections, make sure that the subwoofer and amplifier are switched "OFF". The Mezzo 9 can be used in two basic configurations: 1. With an amplifier without a dedicated filtered Subwoofer output.
Option 2 A high quality stereo phono/RCA cable is the preferred connection type, use the high-level connection option below only if your amplifier does not feature pre-amp outputs.
2. With an amplifier (such as a home cinema receiver) which does have a dedicated filtered Subwoofer output.
High Level In
For this configuration there are two options, either you can connect the Mezzo 9 to the amplifiers preamp output or its speaker outputs (the Mezzo 9 uses whichever you choose automatically). In both cases the Mezzo 9 then performs the required low-pass filtering and summing to mono internally to create a subwoofer channel. See below:
LEFT
Amplifiers without a dedicated Subwoofer output:
HIGH LEVEL IN
RIGHT
In fact if required it is possible to make both connections at the same time and switch between them (see details later).
Amplifier
Option 1 2-channel connections
RIGHT
Pre-amp output
Loudspeaker
Loudspeaker
HIGH LEVEL IN
LEFT
6
In this case, use speaker cable or other wire. The Mezzo 9 presents a high input impedance to the amplifier and is wired in parallel with the main speakers. The Mezzo 9 will not draw any significant current from the amplifier and so a large gauge speaker cable is not required, small gauge cable can be used, and as the amplifiers output impedance will normally be very low screened cable is not required.
Amplifiers with a dedicated Subwoofer output:
If using High Level In, connect another set of cables from the Left and Right High Level Inputs of the Mezzo 9 to the Left and Right High Level Inputs of the next subwoofer. Alternatively connect another set of cables from the amplifier outputs to the Left and Right High Level Inputs of the next subwoofer. In either case the subwoofer inputs are simply in parallel to each other and in parallel to the main speakers.
Home cinema connections
LFE or Sub out RIGHT
High Level In DVD
Video 1
Recorder 1
7.1 Direct In
7.1 Preamp Out
Y
Y
Y
Y
L
R
C
L
Cb/Pb
Cb/Pb
Cb/Pb
Cb/Pb
SL
SR
SW
SL
SR
SW
Cr/Pr
Cr/Pr
Cr/Pr
Cr/Pr
SBL/SB
SBR
SBL/SB
SBR
R
Control Bus
C
On
Power AC
LEFT
RIGHT
LEFT
Off In
LEFT
HIGH LEVEL IN
Power
RIGHT
Component
TV/Mon Out
HIGH LEVEL IN
HIGH LEVEL IN
Out
Speaker Impedance 4-8 Ohms
Surround Back Right
Surround Back Left/ Surround Back
7.1
6.1
Centre
Surround Right
Surround Left
Front Right
5.1
Front Left
Serial No. label fitted on underside
Amplifier
Connect the "LFE" or "Sub" output on your home cinema receiver. to the LFE In socket of the Mezzo 9 subwoofer using a high quality mono phono/RCA cable. When this input is used the low pass filter in the subwoofer is deactivated, all other adjustments for level, phase, etc. are still available.
Chaining multiple subwoofers It is possible to chain multiple Mezzo 9 subwoofers whichever connection type you are using.
Loudspeaker
Loudspeaker
or:
If using the Line Inputs connect the "Line Out" output of Mezzo 9 subwoofer to the "Line In" sockets on your other subwoofer with a Stereo Phono/RCA lead.
High Level In
RIGHT
RIGHT
HIGH LEVEL IN
HIGH LEVEL IN
LEFT
LEFT
LEFT
HIGH LEVEL IN
RIGHT
LEFT
HIGH LEVEL IN
RIGHT
Pre-amp output
Amplifier
Line Out output
Line In input Loudspeaker
If using the LFE Input connect the "LFE Out" output of Mezzo 9 subwoofer to "LFE In" sockets on your other subwoofer with a mono Phono/RCA lead. LFE or Sub out
RIGHT
RIGHT
HIGH LEVEL IN
HIGH LEVEL IN
LEFT
LEFT
LFE Out output
Loudspeaker
Trigger In / Out The Mezzo 9 features a trigger input that allows its power status to be remotely controlled by a home cinema receiver or other unit that has a trigger output. The trigger input is positive edge triggered, inputting 5-12V DC to "Trigger In" will turn the unit On, removing the trigger voltage will put the unit into Standby. A trigger output allows the signal to be looped on to further units if desired. See later section for full details. 12V Trigger output
RIGHT
RIGHT
HIGH LEVEL IN
HIGH LEVEL IN
LEFT
LEFT
LFE In input
Trigger Out output
Trigger In input
Note: The Trigger Input feature is disabled in Automatic power mode, see later sections for details.
7
8. Remote control/SPL meter
9. Operating instructions
The Remote Control / SPL Meter supplied with the Mezzo 9 is included to aid the set-up and in particular the setting of the Notch/Boost Filters if required. It may also be used to correctly set-up satellite speaker levels when used in conjunction with an AV receiver.
The custom-made user interface on top of the Mezzo 9 subwoofer shows the current status and allows you to set-up the DSP features.
Enter / Set-up
| | |
|
|
| | |
SPL
| | |
Press to activate SPL meter. Press and hold to change range from 1dB (fine measurements) to 2dB (coarser measurements, recommended for initial set-up).
Back Press to exit current menu selection and return to volume control.
Press to enter set-up menu and accept changes. This action is represented by the symbol.
Control wheel
Standby Press to put the subwoofer in and out of standby.
Navigation Press to navigate through menus as with control wheel on top of subwoofer. Use to adjust volume / settings and cycle through menu items. This action is represented by the symbol.
Menu Press to enter set-up menu and to make selections within menu structure.
Presets/Save presets
Night Press to turn night modes on and off. |
| |
| | |
| |
| | |
Source Press to choose between the LFE and Line / High Level inputs.
Compare When this button is pressed, Notch/Boost, Phase and Dynamics are deactivated, press again to reactivate features. Use this function to compare response of subwoofer with and without DSP features.
Movie /
Music /
Games Press these buttons to choose between the saved presets.
The Mezzo 9 has the ability to save 3 presets: Music, Movies, and Games. The three presets can contain completely different settings for level, crossover frequency, input, notch filtering, dynamics etc. Setting a preset is simply a matter of setting your desired adjustments, then pressing and holding the Presets button for 3 seconds. The Mezzo 9 will ask which of the 3 presets you wish to save the current adjustments in. Rotating the Control Wheel moves to the next preset. Press enter when you have the right preset or press Back (or wait a few seconds) to cancel. To recall a preset simply press the Presets button, each time the button is pushed the Mezzo 9 cycles to the next one.
Back
|
| |
| | |
| |
| | |
See the "Acoustic set-up procedure" section of this manual for more information.
To go back to a previous item or functions. This action is represented by the symbol.
8
10. Menu system Volume The default state of the subwoofer is volume control mode. In this state, turning the control wheel changes its volume.
Press the back button at any time to return to the previous menu. Pressing Back a few times will always return you to the top volume control mode:
| | |
| |
| | |
| | |
Source
Set-up menu
Use this menu to select the source input to be used.
To enter the set-up menus, press the control wheel:
The menu structure is as follows: LINE / HILVL | |
| | |
| | |
| | |
LFE LFE / LINE / HILVL
The first menu item (which is Source) will be displayed.
LINE / HILVL - Select for left, right line level and high level speaker inputs.
Turn the control wheel to cycle through the other set-up menu options:
LFE - Select for LFE channel only. LFE / LINE / HILVL - Selects both inputs at the same time (you will now need to control which one you are using by turning on/off the two source components).
Low pass
The set-up menu order is as follows: Source
Low pass
Filter 1
Filter 2
The Low pass filter is the filter that removes all of the high frequencies from the signal before it reaches the amplifier. When this filter is set correctly, the subwoofer will blend in with the other speakers in your system, and the entire system will sound naturally balanced. The menu structure is as follows: Slope
Phase Frequency Power Modes
LCD Brightness
Volume Scale
Dynamics
Once you have selected the desired menu, press the control wheel again to enter that menu. Now turn the control wheel to display the relevant parameter/options: 1
Filter 1 & 2 The menu structure is as follows: Off Notch
2
Frequency
| | |
| |
| | |
See "Acoustic set-up procedure" for more details on setting the Low Pass filter.
| | |
Depth Width
Boost
When the parameter/option you desire is displayed, press the control wheel to accept the changes, an asterix (*) will show the active setting:
Frequency Height
| |
| | |
| | |
Each of these filters can be selected as a Notch or a Boost filter.
| | |
You can continue to cycle through the menu options by repeatedly pressing the control wheel. If you wish to adjust a parameter that you have just entered, keep pressing the control wheel until the desired parameter is displayed again.
Notch/Boost filter - The response of a speaker in any room may have peaks or dips that are created by acoustic reflections. The dimensions of the room and the acoustic properties of the surfaces within the room determine the location and size of the peaks. The notch/boost filters can be used to cancel out these peaks to a large extent. See "Acoustic set-up procedure" for more details on setting up the notch filter.
9
10. Menu system (continued) Phase
Power mode
The menu structure is as follows:
The power mode select how and when the subwoofer will come in and out of standby mode.
Off
The menu structure is as follows:
On Phase shift
Auto Manual
A key factor in the performance of a subwoofer is integration with the full range speakers, i.e. how well the subwoofer blends in with the rest of the system. The main left and right speakers and subwoofer do not always sum together as well they should because as well as simple level differences, differing distances from the listening position, different amounts of delay through electronics, and differences in the phase response of the speakers themselves can have a major effect. Traditionally, subwoofers have used a phase invert or polarity switch to help achieve better integration. We have taken this concept a step further with our Phase Compensation Filter. This filter allows the user to increase the phase offset continuously in degrees until the optimal integration has been achieved.
Auto - The subwoofer will automatically come out of standby when an audio signal is sensed at the inputs, and it will go back into standby when there has been no signal for a period of 5 minutes. Note the Trigger Input is disabled in Auto Mode. Manual - The subwoofer will come out of standby when the control wheel is pressed. To go back into standby, press and hold the control wheel. Alternatively the subwoofer will respond to the Trigger Input if present.
LCD brightness This menu allows you to select the brightness settings of the LCD display.
The unit "degrees" refers to the number of degrees the phase of the subwoofer response is being shifted at its low pass filter frequency.
The menu structure is as follows:
Note: In the case of the LFE channel where no low pass filter is applied, the number of degrees displayed refers to the shift taking place at 80Hz.
LCD Bright
See the "Acoustic set-up procedure" section of this manual for more information on setting up the phase compensation filter.
LCD Off
Dynamics The menu structure is as follows:
LCD Dim
Volume scale This menu selects the form in which the volume is displayed. The Volume scale menu structure is as follows:
Off Night 1 Night 2
Decibels Linear
Night 3 Enhance 1 Enhance 2 Enhance 3 The term dynamics refers to how the unit responds to quiet and loud sounds. In normal operation a subwoofer would provide the same gain to both quiet and loud sounds. In the Mezzo 9, however, by controlling the dynamics of the unit in our DSP preamp, we can vary the gain in sympathy with the loudness of the sound in a couple of ways to provide a more desirable audio response for different listening applications. The Mezzo 9 subwoofer has two different dynamics styles with three settings each: Night 1/2/3 - This setting helps to expand and make more noticeable quiet signals (using what is called downward expansion) while also reducing the level of the loud signals (using what is called compression). The Night modes are designed to both improve the intelligibility of bass soundtracks when listening quietly late at night and to reduce the bangs and booms so that you don’t disturb the neighbours for instance but can still hear all the effects well. Three night modes are available with 1 being the least and 3 the strongest effect. Enhancement 1/2/3 - This setting enhances and boosts the dynamic range of the bass soundtrack for more impact (using expansion) whilst controlling the very loud signals (using limiting) to protect the speaker from being overdriven. Three enhancement modes are available with 1 being the least and 3 the strongest effect.
10
Decibels - In decibels mode, the volume scale will range from a minimum of -90dB to a maximum of 0dB (i.e. volume is shown as a minus number of decibels below the maximum setting). Linear - In linear mode, the volume scale will range from a minimum of 0 to a maximum of 90 (i.e. arbitrary units with 0=no volume and 90=maximum).
11. Factory Reset If you wish to return to the Factory Presets, turn the mains power switch "Off" (refer to previous section of this manual "Bottom panel"), press and hold the Preset button and the Back button together, keep holding the buttons down while turning the mains power switch on.
12. Acoustic set-up procedure Set up Overview There are three areas that are covered by this setup routine: notch/boost filters, low pass filter, and phase compensation filter. The notch and boost filters in the Mezzo 9 subwoofer are designed to cancel out the peaks and dips in frequency response that are caused by room acoustics. The low pass filter rolls off the high frequencies and provides integration with the full range speakers. The phase compensation filter helps the subwoofer and the full range speaker sum together correctly. The following setup routine helps you to measure the frequency response of the subwoofer in your room, and then apply the correct filters to give you the most accurate response.
To correct these issues, a notch filter would be applied at 80Hz and a boost at 35Hz. After these corrections have been made, the net result would hopefully be a response much closer to that shown in figure 2 below: B
Level (dB)
A
The idea is to measure the frequency response of the subwoofer in your room at your actual listening position and then apply any required equalisation to make it as flat as possible. Then adjust the crossover slope and phase as necessary to join the frequency response of the subwoofer to that of you main speakers as smoothly as possible. Fully read through the How it works sections for Notch/Boost, Low Pass Filter and Phase Compensation below before starting to make any changes or attempting the Acoustic Setup procedure. These give an overview of the setup process, why it is necessary and what it can achieve.
Set-up CD The setup CD contains 17 tracks of test signals. Track 1 is wide band noise that allows you to set your subwoofer to a reference level. Tracks 2-16 are narrow band modulated tones that allow you to measure the level of the subwoofer in small frequency steps ranging from 30Hz to 100Hz and create a frequency response graph. The 17th track is a special test tone for setting up the phase filter. Also on the CD is a PC application that helps you set the Notch/Boos Filter.
10
100
1K
10K
Frequency (Hz) Figure 2
Low Pass Next we need to join the subwoofers response to that of the main speakers. The low pass filter adjustment sets the crossover point and slope of the filter that prevents high frequencies going to the Sub and this joins its response to that of the main speakers. The frequency of this point can be moved up or down for best fit for your loudspeakers and its slope adjusted to best match the natural rolloff of the low frequency response of the main speakers.
The CD is used with the "Acoustic setup procedure". See later section.
How It Works Notch/Boost
Full range
Sub
Level (dB)
A typical subwoofer response in a room may look something like Figure 1 below.
24dB/Oct low pass slope
B
12dB/Oct low pass slope
Variable cross over point
Diagram 1 Level (dB)
If the Low Pass Filter is set too high the Subwoofer and main speaker responses can overlap too much and create an unwanted hump in the overall response. A 10
Level (dB)
100
1K
Large overlap
Level (dB)
=
10K
Frequency (Hz) Figure 1 10
As you can see in this example there is a peak at 80Hz (B) and a slight deficiency at 35Hz (A).
100
1K
10
10K
100
1K
10K
Conversely, if the Low Pass Filter is set too low (see diagram 1) the Subwoofer and main speakers responses might not join properly and create an unwanted dip in the overall response. Large gap
Level (dB)
Level (dB)
10
100
= 1K
10K
10
100
1K
10K
11
12. Acoustic set-up procedure (continued) Phase Compensation In any speaker system there will always be inherent phases shifts between of the main speakers and subwoofer at the crossover point. These are caused by the actions of the crossovers and the response characteristics of the speaker systems themselves. Because of this it is normal to find that the responses don’t add together accurately as might be expected and some cancellation can instead take place at the crossover region. The effect can be similar to when the crossover of the subwoofer is set too low and a ‘hole’ appears in the overall response as below, although less pronounced. Ideal match
Level (dB)
Level (dB)
but phase issue causes dip
4. Play track 1 (wide band noise), adjust the amplifier volume until the SPL REF LED is lit green:
The sets a reference level
5. Play the rest of the tracks one by one, noting the readings for each track. Plot your frequency response or a copy of the supplied graph. 6. If the response looks like it needs equalisation by a notch/boost filter you can calculate the best notch filter settings, using the set-up application supplied on the Mezzo 9 set-up CD or by visually inspecting the graph. To use the CD simply load it into your computer and follow the on-screen instructions:
= 10
100
1K
10
10K
100
1K
10K
The Mezzo 9 features variable phase that allows you to adjust the phase until the subwoofer and main speaker outputs are in phase at the crossover region and the two responses sum evenly. Level (dB)
Level (dB)
To set up the notch filter by hand: a) Find the track with the highest reading and set the notch filter frequency to this value.
= 10
100
1K
10K
10
100
1K
10K
b) Set the depth to the value that best cancels the peak. c) Set the width to the narrowest setting (1).
Performing the acoustic set-up
d) Repeat step 5.
A. Notch filter
e) If peaks are measured on either side of the track located in a), set the width to medium (2) and repeat d).
Make sure all filters in the sub are turned off (low pass, filter 1, filter 2, phase) the first time you perform this setup routine (if desired, perform a factory reset as previously described to reset all parameters). 1. Disable all speakers in your system except the subwoofer by disconnecting one of either + or - leads at the back of each speaker:
7. If there is another peak in the response after applying notch filter 1, this peak can be addressed with notch filter 2. Follow the above steps 1 through 7 to set this filter. Additionally, if there is a dip in the response of the sub, try setting the second filter to a boost filter at the frequency of the dip to give a flatter overall response.
B. Low Pass 1. If you are using the LFE input, there is no need to set the low pass filter. The low pass is usually implemented in the AV receiver. However if your AV receiver features an adjustable crossover frequency you may wish to adjust that (consult your AV Receivers manual) and use the Mezzo 9’s SPL meter and test disc to confirm the response in the same way as you would if you were adjusting the Mezzo 9’s own crossover. 2. Load the supplied set-up CD:
2. Re-connect your main speakers and set the crossover to a sensible starting position. As a guide for setting the low pass filter here are some typical settings for different types of speakers to start with: Tower: 35Hz – 50Hz Bookshelf: 50Hz – 65Hz Satellite/mini: 80Hz - 120Hz
3. Sit in the listening position and set the SPL meter to 2dB range:
12
3. Now re-measure the frequency response of your system at the listening position. In particular pay attention to the response where the main and subwoofer responses meet (usually around 80-120Hz). Adjust the crossover frequency to achieve the flattest response.
C. Phase compensation filter
Use Your Ears
1. Enable all speakers in your system.
Following the setup procedure is only the first step in getting the most out of your Mezzo 9 subwoofer. Listen to some well known source material. Use the compare button on the remote control to listen to the sub with and without the filters in place.
2. Load supplied set-up CD. 3. Sit in the listening position and play the last track on the CD (17). You may want to put the track on repeat to give you enough time to complete the phase set-up. 4. Turn on SPL meter on 1dB range. 5. Adjust the volume on your amplifier or receiver until the SPL REF led is lit green. 6. Adjust the phase filter by steps until the maximum level measured by the SPL meter is achieved. 7. Play some well known source material and continue to adjust the phase filter for the best overall sound.
Note: Don’t forget to save your settings in a preset once you are finished so that you don’t lose them when the power is turned off.
Level (relative dB SPL)
13. SPL measurement graph 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14
Frequency (Hz)
30
32
34
36
38
41
44
48
53
58
64
71
80
89
101
CD
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
13
Level (relative dB SPL)
18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14
30
32
34
36
38
41
44
48
53
58
64
71
80
89
101
CD
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Frequency (Hz)
30
32
34
36
38
41
44
48
53
58
64
71
80
89
101
CD
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
Track
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Level (relative dB SPL)
Frequency (Hz)
18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14
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