MB QUART MYKRO RM1000.1 Installation manual

MYKRO
Lower power amplifiers will clip earlier than their more powerful cousins,
and cause loudspeaker failure when overdriven, due to the harmonics
generated by a clipped signal, thus overheating voice coils.
Installation Manual
Amplifiers should be mounted with the fins running horizontally for best
convection cooling, to minimize overheating. Purchase the best quality
RCA cables you can afford, for reliability and less engine noise
interference in the audio system.
Congratulations!
By purchasing an amplifier from MB Quart, you have decided on a product
of the highest technical quality. MB Quart wishes you great enjoyment with
your amplifier. Should you have any questions about this system or other
MB Quart products, please email us at info@maxxsonics.com
It is highly recommended that the amplifier be mounted to a board of MDF
or other solid structure using the 4 mounting screws provided. Avoid
mounting the amplifier to metal as this can introduce noise and other
unwanted issues. When mounting the amplifier, ensure that it is mounted
HORIZONTALLY, as shown in the diagram above, for optimal heat
dissipation. Mounting amplifiers to speaker enclosures is not
recommended as this can cause damage to the amplifier components.
When choosing a location for mounting the amplifier, ensure that you
check for clearance from wires, gas tank, electrical devices and brake
lines etc.
System Design
The success of any car stereo system relies on several factors, such as
the system design, execution of the installation, and system setup. Please
remember that any system is only as good as its weakest link.
Please remember that higher power systems are not necessarily useful
purely for high sound pressure levels, but also to establish a headroom
capability, to reproduce musical peaks cleanly without distortion.
WOOD
RM440.4 / RM740.5 / RM1000.1
Index
WARRANTY
1
INSTALLATION INSTRUCTIONS
General Instructions
Settings for Best Performance
2
3
TROUBLE SHOOTING
4
RM440.4 4-Channel Amplifiers
5
RM740.5 5-Channel Amplifiers
6
RM1000.1 1-Channel Amplifier
7
TECHNICAL DATA
9
WARRANTY
1
FOR EXTENDED WARRANTY INFORMATION, PLEASE VISIT
WWW.MAXXWARRANTY.COM
1
INSTALLATION INSTRUCTIONS
General Instructions
General:
Run the wiring so that RCA cables are at least 18“ away from power and speaker cables. Keep RCA cables away from electrical devices in the vehicle
that can cause electrical noise, such as electric fuel pumps, emission control modules and other on-board electronic modules.
Power and ground connections:(See table below)
Use a sufficient gauge power cable and ground cable using the chart below as reference to what size wire you require. Mykro series amplifiers require
at least 4 gauge power wire. In a multi amplifier system, add the total value of the manufacture recommended fusing to get your total system
amperage. Some applications may require multiple runs of power wire to meet the system requirements. In multi amplifier systems it is advisable to
mount a large enough fuse right at the battery, and run one or multiple +12 volt power cables to a fused distribution block near the amplifiers. It is then
a simple matter to connect the +12 volt terminal of each amplifier to the distribution block. During this process, please ensure that the main power fuse
is removed to avoid shorting the electrical system. The main fuse must be within 12” of the vehicles battery.
Ground each amplifier with as short a ground lead as possible directly to the vehicle chassis using at least 4 gauge wire or equivalent to the size of the
amplifiers’ power wire. Use a ground distribution block, if you wish, but it is extremely important to keep the main ground lead from this distribution
block to the chassis as short as possible , not more than 12“. The ground connection integrity to the chassis is very important, and the best way to
achieve a good, solid electrical and mechanical contact is to use a large round crimp lug, crimped and soldered to the ground cable. The next step is to
scrape the paint off the vehicle chassis , slightly larger than the ground lug, at the connection point. Drill a clearance hole in the chassis, the same size
as the lug hole, and use a bolt, spring washer and nut to securely fasten the ground lug. Use petroleum jelly to coat the bolt/lug connection, to prevent
oxidization with time.
TIP: Use the same approach when installing head units, equalizers or any audio equipment for that matter - run short individual grounds from each
piece directly to the vehicle chassis, to minimize ground loops and system noise. All power, ground and speaker connections should be crimped and
soldered for reliability. Make sure that none of the cable insulation can chafe against exposed metal in the vehicle, causing short circuits to the
chassis.
Safe connection sequence:
After all cables are run, connect speaker wires to the speakers and amplifiers, then run and plug in RCA cables. Next, connect all power, ground, and
remote turn on leads. Now connect all +12 volt cables to the amplifier/s and distribution blocks and fuse holders. Finally, connect the main +12 volt
cable to the battery, with the main fuse removed, and we are almost ready to power up the system.
Power up the system:
The following procedure may seem like overkill, but there is nothing more frustrating when turning on a system for the first time, and it does not work
properly immediately.
First, make sure the head unit is off, and turn all level controls to minimum (counterclockwise), including the head unit volume control. Set all equalizers
to 0 dB (no boost), and all crossover frequency controls at approximate frequencies, as recommended by the loudspeaker manufacturer. Set all input
selector and crossover switches as required for the application. Remove all amplifier fuses, and insert the main fuse at the battery. If the fuse does not
blow, you can insert the fuse in one of the amplifiers, and we are ready to turn on the system. Turn the head unit on, insert a CD, or select a radio
station, and increase the head unit volume control. If the system sounds fine, turn off the head unit, and install fuses in the remaining amplifiers, one by
one, till the complete system is powered up and functioning properly.
WIRE LENGTH
SYSTEM
AMPERAGE
10-13 ft.
13-16 ft.
16-19 ft.
19-22 ft.
22-28 ft.
35-50
8
6
4
4
4
4
50-65
6
4
4
4
4
2
68-85
4
4
2
2
2
0
85-105
4
2
2
2
2
0
105-125
4
2
0
0
0
0
125-150
2
0
0
0
0
0
WIRE GAUGE
7-10 ft.
2
INSTALLATION INSTRUCTIONS
Settings for Best Performance
RM440.4 / RM740.5
General:
At this point you are ready to get more specific on the settings for your amplifier.
High Pass:
-When in Hi Pass operation, this setting acts as a low frequency cut off for your system reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this
point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 100Hz, the amplifier will not play frequencies below 100Hz but will play frequencies from
100Hz to the highest frequency the amplifier is capable of reproducing.
-When in Low Pass/Bandpass operation, this setting acts as a low frequency cut off for your system reproduction aka Subsonic Filter. The point that you set it at cuts off any frequencies
from reproduction beyond this point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 60Hz, the amplifier will not play frequencies below 60Hz
but will play frequencies from 60Hz to the chosen Low Pass frequency.
-When in Flat/Full operation, the Low Pass crossover is bypassed.
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable from 0-12dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to
your speakers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless listening at a low
volume or a low recording quality as this can result in high distortion and possibly clipping.
Low Pass:
The Low Pass control acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. Turning the potentiometer all the way to the right is a great
starting point. EXAMPLE: If you adjust the Low Pass to 120Hz, the amplifier will not play frequencies above 120Hz but will play frequencies from 120Hz to the chosen Hi Pass or
Subsonic frequency.
-When in Hi Pass operation, this setting is bypassed.
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input
sensitivities properly to the head unit output signal level.
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these general guide lines:
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the
left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/speaker combo has reached its maxx
output in this application.
RM1000.1
General:
At this point you are ready to get more specific on the settings for your amplifier.
Subsonic:
This setting acts as a low frequency cut off for your system bass reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this point. The 12 o’clock
position is a great starting point. EXAMPLE: If you adjust the Subsonic to 25Hz, the amplifier will not play frequencies below 25Hz but will play frequencies from 25Hz to the chosen Low
Pass frequency.
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable from 0-10dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to
your subwoofers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless listening at a
low volume or a low recording quality as this can result in high distortion and possibly clipping.
Low Pass:
The Low Pass control acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. The 12 o’clock position is a great starting point. EXAMPLE: If you
adjust the Low Pass to 80Hz, the amplifier will not play frequencies above 80Hz but will play frequencies from 80Hz to the chosen Subsonic frequency.
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input
sensitivities properly to the head unit output signal level.
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these general guide lines:
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the
left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/subwoofer combo has reached its maxx
output in this application.
3
TROUBLE SHOOTING
The key to finding the problem in a misbehaving sound system is to isolate parts of that system in a logical fashion to track down the fault.
Description of the Diagnostic system built into all MB Quart amplifiers
The diagnostic system will shut down the amplifier, until reset by turning the head unit off, and back on. This state of affairs will be indicated by the front panel
PROTECT LED lighting up under the following conditions:
1 - A short circuit on the loudspeaker leads.
2 - An internal amplifier fault that causes a DC offset on the loudspeaker output.
Should the amplifier go into diagnostic mode, simply disconnect all RCA and speaker leads, while keeping +12 volt, power ground and remote leads connected.
1. Now turn the amplifier back on, and if the diagnostic LED lights, the amplifier has an internal fault.
2. If not, plug the RCA cables back, and reset the amplifier. If it goes into diagnostic now, the fault lies in the input, either with bad cables or source unit.
3. If the amplifier seems fine with RCA cables plugged in, connect the speakers, one at a time, and if one of the speakers or its wiring is faulty, it will activate the
diagnostic system.
Amplifier heatsink overheating
The amplifiers will shut down when the heatsink temperature reaches 80 degrees centigrade, and turn back on once the unit has cooled down below that point.
Causes of overheating:
1 - Inadequate cooling - relocate or remount to provide better natural airflow over the fins.
2 - Driving high power levels into low impedances - back off on the volume control, and/or make sure you are not loading the amplifier with less than the
recommended loudspeaker impedance.
Low output power
1 - Check that level controls have been set up properly.
2 - Make sure that the battery voltage, as measured at the amplifier’s +12 volt and ground terminals, is 11 volts or more.
3 - Check all +12 volt and ground connections.
Fuses blowing
1 - The use of loudspeaker impedances below the recommended minimums will draw more current - check.
2 - A short on the main +12 volt cable from the battery to the vehicle chassis will cause the main fuse to blow.
System does not turn on
1 - Check all fuses.
2 - Check all connections.
3 - Measure the +12 volt and remote turn on voltages at the amplifier terminals. If these are non existent or low, take voltage measurements at fuse holders,
distribution blocks, the head unit’s +12 volt and remote leads to localize the problem.
Noise problems
System noise can be divided into two categories, hiss, and electrical interference.
Hiss, or white noise
1 - High levels of white noise usually occurs when amplifier level controls are turned up too high - readjust according to the procedures in section ”Setting up
systems after installation for best performance”
2 - Another major problem that can cause excessive hiss, is a noisy head unit - unplug the amplifier input RCA cables, and if the hiss level reduces, the source unit
is at fault.
Electrical interference
The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition system, alternator, fuel pumps, air
conditioners, to mention just a few, create radiated electrical fields, as well as noise on the +12 volt supply and ground. Remember to isolate the problem - first
unplug amplifier input RCA cables, if the noise is still present, check the speaker leads, if not, plug the RCA’s back, and investigate the source driving the
amplifier, one component at a time.
A ticking or whine that changes with engine RPM:
1 - This problem could be caused by radiation pickup of RCA cables too near to a fuel pump or a distributor, for instance, - relocate cables.
2 - Check that the head unit ground is connected straight to the vehicle chassis, and does not use factory wiring for ground.
3 - Try to supply the head unit with a clean +12 volt supply directly from the battery +, instead of using a supply from the in dash wiring/fusebox.
A constant whine:
This type of noise can be more difficult to pinpoint, but is usually caused by some kind of instability, causing oscillations in the system.
1 - Check all connections, especially for good grounds.
2 - Make sure that no speaker leads are shorting to exposed metal on the vehicle chassis.
3 -RCA cables are notorious for their problematic nature, so check that these are good, in particular the shield connections.
4
RM440.4
4-Channel Amplifiers
FEATURES:
- 2 Sets of RCA inputs
- LEVEL: Variable sensitivity from 0.2V to 6V
- BASS EQ: Adjustable 45Hz bass boost from 0dB to 9dB
- X-OVER: Selects internal crossover functions
- FULL: Bypasses all crossovers for full frequency operation
- LP/BP: Selects the built in variable LOW PASS filter
- HP: Selects the built in variable HIGH PASS filter
- MODE: “2” indicates one set of RCA’s are being used. This will also pass signal to channels 3/4 through 1/2 inputs.
“4” indicates connecting 2 sets of RCA’s to 1/2 and 3/4 inputs.
- LINE OUTPUT: Full range RCA pass through.
4 Channel Full Range Stereo:
Control checklist:
- Refer to the section “Settings for Best Performance”
Interconnect cable checklist:
- Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables.
Switch setting checklist:
- 1/2CH X-OVER: FULL
- 3/4CH X-OVER: FULL
MODE: “4” since 2 sets of RCA’s are connected.
Minimum final loudspeaker impedances:
- 2 ohm per channel.
HP FREQ
HP
50 Hz 3K
LP FREQ
50 Hz 3K
HP FREQ
0 dB 9
BASS EQ
6 V 0.2
LEVEL
6 V 0.2
LEVEL
MIN
4
CH4
2
BRIDGED
MIN
CH2
2
2
MIN
CH1
MIN
CH3
4 CH
MONO MIX OUT
4
CH1
CH4
BRIDGED
CH2
2
MIN
CH3
2CH 4CH
INPUT MODE
MIN
25A x 2 MAX
FULL
10 Hz 1K
+12V
DUPE CH3-4
FULL
CH1-2
HP
TURN ON
LP/BP
GND
CH3-4
2 or 3 Channel System:
Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking
advantage of the mono bridging capability of all MB Quart amplifiers. In order to create
a 2 channel system, simply follow the example to also mono bridge channel pair 1/2.
Interconnect cable checklist:
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit
with good quality RCA cables.
- A MONO signal source is required to bridge channel pair 3/4, such as would be
available from the mono sub bass output of an active crossover, whether standalone, or
built into a head unit or equalizer. If you only have 1 set of RCA outputs from your
headunit, you can simply connect those to the inputs for ch 1/2 and switch the MODE to
2ch.
Important: Do not be tempted to connect the hot, or positive outputs, from any source together
to obtain a mono signal, as this could very well damage the output stage of that source.
- It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter RCA cable.
- Connect the mono speaker positive terminal to the CH3 +, and its negative terminal to CH4 as shown.
Switch setting checklist:
- 1/2CH X-OVER: FULL
- 3/4CH X-OVER: LP/BP
Control checklist:
- Refer to the section “Settings for Best Performance”
Minimum final loudspeaker impedances:
- 2 ohm per channel in stereo mode.
- 4 ohm mono bridged.
HP FREQ
HP
50 Hz 3K
LP FREQ
50 Hz 3K
HP FREQ
0 dB 9
BASS EQ
6 V 0.2
LEVEL
6 V 0.2
LEVEL
MIN
4
CH4
2
BRIDGED
MIN
CH3
2
CH2
MIN
MIN
4
2
MIN
CH3
4 CH
MONO MIX OUT
CH1
CH1
CH4
2
CH2
5
ONYX
BRIDGED
2CH 4CH
INPUT MODE
MIN
25A x 2 MAX
FULL
10 Hz 1K
+12V
DUPE CH3-4
FULL
CH1-2
HP
TURN ON
LP/BP
GND
CH3-4
MONO LINE INPUT
(Unless using procedure
listed above for 2ch)
RM740.5
BASS EQ
5-Channel Amplifiers
0 dB 12
CH5 LEVEL
6 V 0.2
CH1-2
HP FULL
SUBSONIC
LP FREQ
FILTER
FEATURES:
- 3 Sets of RCA inputs
- LEVEL: Variable sensitivity from 0.2V to 6V
- BASS EQ: Adjustable 45Hz bass boost from 0dB to 12dB
- X-OVER: Selects internal crossover functions
- FULL: Bypasses all crossovers for full frequency operation
- LP/BP: Selects the built in variable LOW PASS filter
- HP: Selects the built in variable HI PASS filter
HP FREQ
LEVEL
50 Hz 3K
6 V 0.2
CH3-4
FULL
10 Hz 50 50 Hz 150 LP/BP
HP
LP FREQ
INPUT MODE
2CH
5CH
4CH
HP FREQ
50 Hz 1K 50 Hz 3K
CH1
CH3
CH5 L
CH2
CH4
CH5 R
LEVEL
6 V 0.2
CH5 REMOTE
- INPUT MODE: “2” indicates one set of RCA’s are being used. This will also pass signal to channels 3/4 and
5 through 1/2 inputs. “4” indicates connecting 2 sets of RCA’s to 1/2 and 3/4 inputs. “5” indicates connecting
3 sets of RCA’s to channels 1/2, 3/4 and mono signal to channel 5 inputs.
5 Channel Discrete Operation:
You can use this configuration simply as 4 discrete full range channels, with a 5th low
pass channel. All of the crossovers are bypassed , except the LOW PASS on channel 5.
Interconnect cable checklist:
Connect channel 1&2 inputs to the front output, channels 3&4 to the rear output, and
channel 5 to the mono subwoofer output of a head unit or in dash equalizer.
Control checklist:
- Refer to the section “Settings for Best Performance”
Minimum final loudspeaker impedances:
- 2 Ohms per channel for channels 1-4
- 2 Ohm on channel 5
TURN ON
CH5 LEVEL
+12V
BASS EQ
6 V 0.2
HP FREQ
LP FREQ
6 V 0.2
LEVEL
6 V 0.2
LEVEL
5CH
2CH
4CH
INPUT MODE
2
CH4
MIN
MIN
4
CH5 L
MIN
CH3
CH5 R
CH3
CH1
CH4
MIN
2
MIN
CH1
2
4
BRIDGED
MIN
CH2
2
CH2
BRIDGED
HP FREQ
CH5
50 Hz 3K
50 Hz 1K 50 Hz 3K
40A x 2 MAX
CH1-2
HP FULL
CH3-4
FULL
10 Hz 50 50 Hz 150 LP/BP
HP
SUBSONIC
LP FREQ
FILTER
0 dB 12
CH5 REMOTE
GND
Switch setting checklist:
- CH 1 / 2 X-OVER: FULL
- CH 3 / 4 X-OVER: FULL
MODE: “5” since 3 sets of RCA’s are connected.
Single Set of Stereo RCA’s
We will use the same basic setup on the speaker and subwoofer connections as above
to illustrate an installation that only has 1 set of stereo RCA’s to connect to this amplifier.
By switching the amplifier to 2CH on the INPUT MODE, you now provide signal to all
channels on the amplifier. You sacrifice the ability to fade front to rear though.
Interconnect cable checklist:
Connect Stereo Left and Right RCA’s from headunit to CH1&2 RCA Inputs.
MODE: “2” since 1 set of RCA’s are connected.
Control checklist:
- Refer to the section “Settings for Best Performance”
Minimum final loudspeaker impedances:
- 2 Ohms per channel for channels 1-4
- 2 Ohm on channel 5
TURN ON
+12V
6 V 0.2
CH5 LEVEL
CH1-2
HP FULL
CH5
LEVEL
2
MIN
MIN
CH4
CH5 R
CH5 L
MIN
CH3
CH3
CH4
MIN
4
2
MIN
CH1
2
BRIDGED
MIN
CH2
2
CH1
4
5CH
4CH
CH2
BRIDGED
2CH
INPUT MODE
LEVEL
6 V 0.2
6 V 0.2
HP FREQ
LP FREQ
HP FREQ
50 Hz 1K 50 Hz 3K
50 Hz 3K
40A x 2 MAX
0 dB 12
CH3-4
FULL
10 Hz 50 50 Hz 150 LP/BP
HP
SUBSONIC
LP FREQ
FILTER
BASS EQ
CH5 REMOTE
GND
Switch setting checklist:
- CH 1 / 2 X-OVER: FULL
- CH 3 / 4 X-OVER: FULL
6
RM1000.1
Mono Amplifiers
LEFT
REMOTE
FEATURES:
- 1 Set of RCA inputs
- LEVEL: Variable sensitivity from 0.2V to 6V
- BASS EQ: Adjustable 45Hz bass boost from 0dB to 12dB
- SUBSONIC: Variable from 10Hz to 50Hz
- LOW PASS: Variable from 50Hz to 150Hz
50 Hz 150 10 Hz 50
LP FREQ SUBSONIC
FILTER
0
180
PHASE
0 dB 12
BASS EQ
6 V 0.2
LEVEL
RIGHT
INPUT
OUTPUT
- LINE OUTPUT: Full range RCA pass through.
Interconnect cable checklist:
Connect the inputs to a suitable source, e.g. a head unit with good quality RCA cables.
Control checklist:
Refer to the section “Settings for Best Performance”
Use at least #12 gauge speaker wiring.
Minimum final loudspeaker impedance: 1-Ohm.
+12V
50 Hz 150 10 Hz 50
LP FREQ SUBSONIC
FILTER
TURN ON
GND
REMOTE
180
PHASE
0
30A x 4 MAX
0 dB 12
BASS EQ
6 V 0.2
LEVEL
MIN
INPUT
1
OUTPUT
LEFT
RIGHT
MONO
SUBWOOFER
7
8
9
Biggest POWER systems
V3 Products, Level 10 Performance + 1
Year Warranty
Moderate POWER systems
V2 Products, Level 7 Performance + 6
Month Warranty
Smaller POWER systems
V1 Products, Level 5 Performance
NOTES
10
Check out our videos of new products,
events and technical tutorials at
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PART#N113
RM440.4 / RM740.5 / RM1000.1