Hifionics HFI55 4 User Manual

i
HFi100.2 / HFi55.4 / HFi100.4  
HFi1000D / HFi1500D  
HFi2000D / HFi2500D  
GENERAL INSTALLATION PROCEDURE  
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. 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.  
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.  
Installation  
WOOD  
It is highly recommended that the amplifier be mounted to a board of MDF or other solid  
HF  
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.  
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 the features matrix on page 7 for proper gauge cables per amplifier):  
Use a sufficient gauge power cable and ground cable using the chart below as reference to what size wire you require. HFi 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.  
WIRE LENGTH  
SYSTEM  
AMPERAGE  
7-10 ft.  
10-13 ft.  
13-16 ft.  
16-19 ft.  
19-22 ft.  
22-28 ft.  
NOTE: This Matrix is a general rule  
of thumb. Please refer to the  
manufacturers specific  
requirements. HFi specifications  
can be found on page 7.  
35-50  
8
6
4
4
4
2
6
4
4
2
2
0
4
4
2
2
0
0
4
4
2
2
0
0
4
4
2
2
0
0
4
2
0
0
0
0
50-65  
68-85  
85-105  
105-125  
125-150  
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.  
1
AMPLIFIER FEATURE DESCRIPTIONS  
HFi AMPLIFIERS:  
! Each model is capable of 4 & 2-Ohms stereo per channel, or 4-Ohms mono bridged operation  
except the mono amps which are capable of 4, 2 and 1-Ohm loads.  
! Tri-Mode operation with any stereo pair of amplifier channels is possible, as with all bridgeable  
amplifiers.  
! The input sensitivities for rated output powers are variable from 0.2 volts to 6 volts.  
! All crossovers are fully variable in their respective ranges.  
! Crossover filters are 12dB/Octave.  
! All Hifonics amplifiers feature a comprehensive diagnostic system, with speaker lead short circuit,  
and amplifier DC faults indicated by the red “PROTECT” LED.  
! CAUTION: DO NOT OPERATE ANY AMPLIFIER BELOW THE INTENDED IMPEDANCE. YOU  
WILL CAUSE DAMAGE TO THE AMPLIFIER THAT WILL NOT BE COVERED UNDER THE  
WARRANTY PRINTED IN THE BACK OF THE MANUAL. 2 & 4 Channel amps are capable of 4  
and 2-Ohms wired stereo and 4-Ohms wired mono bridged. The mono amps are capable of 4, 2  
and 1-Ohm.  
! A POWER LED indicates the powered up and turned on condition.  
HFi100.2 2-CHANNEL AMPLIFIERS  
TheX-OVERslide switch selects theinternal crossover functions:  
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting  
simplifying daisy chaining ofamplifiers.  
OUTPUT INPUT  
POWER  
PROTECT  
-HPF:Selects thebuilt in HIGHPASSfilter, variable from 60Hzto12kHz.  
-FULL:Bypasses all crossovers forfull frequency rangeoperation.  
-LPF:Selects thebuilt in LOW PASS, variable from 30Hzto250Hz.  
MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO  
forbridging operation  
LEVEL BASS EQ X-OVER  
HPF  
LPF  
MODE  
L
L
6V 0.2V  
0dB 12dB  
FULL LPF HPF 60Hz 12KHz  
30Hz 250Hz  
MONO STEREO  
R
R
HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the  
HIGHlevel (wire)inputs.  
LINEINPUT:Theline inputaccepts unbalanced (RCA)inputs from 0.2Vto6V.  
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy  
chain multiple amplifiers from onesignal.  
NotethattheLOW PASSsignalisMONO.  
-In the LPF position, the HIGH PASS filter acts as a subsonic  
filter.  
-When the LPF mode is selected, a 0 to +12dB, at 45Hz, BASS  
-EQisalsoswitched in.  
The 4 channel amps have the same features as the 2 channel models accept that there are 2 sets of  
controls.  
1set forchannels 1&2and1set forchannels 3&4.  
HFi55.4 / HFi100.4 4-CHANNEL AMPLIFIERS  
In addition, the 4 channel models have a Mode switch which allows you to select 2, 3 or 4 channel  
operation. Switchto2channel if you only have 1set ofRCA’sin CH1/2andtheunit will automatically  
supply signal tochannels 3/4. Select 3channel whenyou only have RCA’sin CH1/2butplan torun  
channels 3/4bridged. Select 4channel if you areproviding RCA’stochannels 1/2and3/4.  
TheX-OVERslide switch selects theinternal crossover functions:  
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting  
simplifying daisy chaining ofamplifiers.  
LEVEL BASS EQ X-OVER  
HPF  
LPF  
POWER  
CH3/4  
CH1/2  
LINE OUT  
PROTECT  
6V 0.2V  
0dB 12dB  
FULL LPF HPF 60Hz 12KHz  
30Hz 250Hz  
R
L
R
LEVEL BASS EQ X-OVER  
HPF  
LPF  
MODE  
L
6V 0.2V  
0dB 12dB  
FULL LPF HPF 60Hz 12KHz  
30Hz 250Hz  
2
3
4
-HPF:Selects thebuilt in HIGHPASSfilter, variable from 60Hzto12kHz.  
-FULL:Bypasses all crossovers forfull frequency rangeoperation.  
-LPF:Selects thebuilt in LOW PASS, variable from 30Hzto250Hz.  
MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO  
forbridging operation  
HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the  
HIGHlevel (wire)inputs.  
LINEINPUT:Theline inputaccepts unbalanced (RCA)inputs from 0.2Vto6V.  
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy  
chain multiple amplifiers from onesignal.  
NotethattheLOW PASSsignalisMONO.  
-In the LPF position, the HIGH PASS filter acts as a subsonic  
filter.  
-When the LPF mode is selected, a 0 to +12dB, at 45Hz, BASS  
-EQisalsoswitched in.  
-The LINE INPUT signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER  
setting simplifying daisy chaining ofamplifiers.  
HFi1000D / HFi1500D / HFi2000D / HFi2500D MONO BLOCK AMPLIFIERS  
-SUBSONIC:Allows you toadjust thecrossover filter from 15Hzto35Hz.  
-LPF:Allows yo toadjust theLOW PASScrossover filter from 30Hzto250Hz.  
LEVEL: Adjusts theinputsensitivity from 0.2volts to6volts.  
BASSEQ:TheBass EQis adjustable from 0dbto10dB.  
REMOTE:This is theinput jack fortheremote Level control.  
OUTPUT INPUT  
LEVEL BASS EQ REMOTE SUBSONIC LOW PASS  
POWER  
L
L
PROTECT  
6V 0.2V  
0dB 10dB  
15Hz 35Hz  
30Hz 250Hz  
R
R
LINEINPUT:Theline input accepts unbalanced (RCA)inputs from 0.2Vto6V.  
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy  
chain multiple amplifiers from onesignal.  
The monoampsarecapableof4, 2&1-Ohm loads.  
Operating the amp below 1-Ohm can cause damage to the  
amp notcoveredin thewarranty.  
2
HFi100.2 2 CHANNEL AMPLIFIER APPLICATIONS  
FULL RANGE STEREO  
This is themost basic application fortheHFiSeries 2channel amplifiers.  
4. MODE:  
Shouldbein theSTEREOposition.  
5. LineLevel:  
1. Interconnectcablechecklist:  
ConnecttheLINEINPUTStotheRadio/CD withgoodquality RCAcables.  
2. CrossoverSwitch:  
Refertothesection “Settingupsystems afterinstallation forbest performance”  
TheX-OVERswitch must bein theFULLposition.  
3. Crossoverfrequencycontrolchecklist:  
N/Aforfull rangeoperation.  
NOTE:Minimum finalloudspeakerimpedances:  
4&2Ohms stereomodeor4-Ohms monomode  
Thisamplifierwill notdo1Ohm stereoor2/1Ohm monooperation.  
FULL RANGE  
SPEAKERS  
FULL RANGE  
STEREO LINE INPUT  
HF  
TO BATTERY +12v  
VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
MONO  
This application illustrates the basic mono bridging method for all Hifonics  
amplifiers.  
Switchsettingchecklist:  
-TheAMPLIFIERX-OVERswitch should bein theLPFposition andtheMODE  
should bein theMONO position.  
Interconnectcablechecklist:  
A MONO signal source is required, such as would be available from the mono  
sub bass output of an active crossover, whether stand alone, or built into a head  
unit or equalizer. 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 theoutputstage ofthatsource.  
Crossoverfrequencycontrolsettingchecklist:  
LPF:11o’clock  
Minimum finalloudspeakerimpedance:  
-4ohmmono.  
It is necessary to feed the SAME signal to both left and right inputs via a Y-  
adapter RCAcable. Connect the mono speaker positive terminal to the LEFT +,  
andits negative terminal toRIGHT-.  
FULL RANGE  
MONO SPEAKER  
FULL RANGE  
MONO LINE INPUT  
VIA Y-ADAPTER  
FROM MONO SOURCE  
HF  
TO BATTERY +12v  
VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
3
HFi55.4 / HFi100.4 4-CHANNEL AMPLIFIER APPLICATIONS  
4 CHANNEL FULL RANGE SYSTEM  
Here we show how to use the 4 channel amplifiers as straightforward discrete 4  
channel full rangeunits.  
-HIPASS:N/A  
-LOW PASS:N/A  
Interconnectcablechecklist:  
-Connectthefourinputs oftheamplifier toaRadio/CDwithquality RCAcables.  
Channels3/4:  
-HIPASS:N/A  
-LOW PASS:N/A  
Switchsettingchecklist:  
-1/2CHX-OVER: FULL  
-3/4CHX-OVER: FULL  
Levelcontrolchecklist:  
-Refertothesection “Settingupsystems afterinstallation forbest performance”  
Crossoverfrequencycontrolchecklist:  
Channels1/2:  
Minimum finalloudspeakerimpedances:  
-2ohmperchannel.  
HF  
2 or 3 CHANNEL SYSTEM  
Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking  
advantage ofthemono bridging capability ofall Hifonics amplifiers.  
Switchsettingchecklist:  
-1/2CHX-OVER: FULL  
-3/4CHX-OVER: LPF  
The following example shows how to create a 3 channel system by mono  
bridging channel pair 3 / 4. In order to create a 2 channel system, simply follow  
theexample toalso mono bridge channel pair 1/2.  
Crossoverfrequencycontrolchecklist:  
Channels1/2:  
-HIPASS:N/A  
Interconnectcablechecklist:  
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head  
unit withgoodquality RCAcables.  
-AMONO 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 3ch. The amplifier will auto sum the signal and  
provide mono outputfor bridged channels 3/4.  
-LOW PASS:N/A  
Channels3/4:  
-HIPASS:N/A  
-LPF:11o’clock  
TIP: If you are using the mono sub bass output of an active crossover, there is  
nothing wrong with switching in the low pass filter in these amplifiers for a  
steeper low pass rolloff.  
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  
outputstage ofthatsource.  
- It is necessary to feed the SAME signal to both left and right inputs via a Y-  
adapter RCAcable.  
- Connect the mono speaker positive terminal to the RIGHT +, and its negative  
terminal toLEFT-as shown.  
Levelcontrolchecklist:  
-Refertothesection “Settingupsystems afterinstallation forbest performance”  
Minimum finalloudspeakerimpedances:  
-2ohmperchannelinstereomode.  
-4ohmmonobridged.  
MONO LINE INPUT  
(Unless using procedure  
listed above for 3ch)  
STEREO LINE INPUT  
HF  
4
HFi55.4 / HFi100.4 4-CHANNEL AMPLIFIER APPLICATIONS  
Front/Rear high pass, using a 2 channel amplifier for mono sub bass  
The combination of a 2 and a 4 channel amplifier, utilizing their built in  
crossovers, makes it a snap to put together a full system with front and rear  
highs, withmono sub bass.  
Channels1/2:  
-HIPASS:100Hz  
LOW PASS:N/A  
Interconnectcablechecklist:  
- Using good quality RCAcables, feed the front and rear outputs of a head unit to  
theinputs ofthe4channel amplifier as shown.  
Channels3/4:  
-HIPASS:100Hz  
-LOW PASS:N/A  
-Also connect the LINE OUT of the 4 channel amplifier to the LINE INPUT of the  
2channel amplifier as shown.  
2channelbassamplifier:  
-HIPASS(Subsonicfilter):10Hzto40Hz  
-LOW PASS:80Hz  
Mono basswooferwiring:  
Connect the mono speaker positive terminal to the LEFT +, and its negative  
terminal toRIGHT-.  
Please note that these frequency points are suggestions only. Refer to the  
loudspeaker manufacturer specifications and the section “Setting up systems  
afterinstallation forbest performance”  
Switchsettingchecklist:  
4channelhighsamplifier:  
-1/2CHX-OVER: HPF  
-3/4CHX-OVER: HPF  
Levelcontrolchecklist:  
- Refertothesection “Settingupsystems afterinstallation forbest performance”  
2channelbassamplifier:  
-X-OVERswitch: LPF  
Minimum finalloudspeakerimpedances:  
-2ohmperchannelinstereomode.  
-4ohmmonobridged.  
Crossoverfrequencycontrolchecklist:  
-4channelhighsamplifier:  
HF  
STEREO  
INTERCONNECT  
RCA CABLE  
SUBWOOFER  
HF  
TO BATTERY +12v  
VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
5
HFi1000D / HFi1500D / HFi2000D / HFi2500D MONO AMPLIFIER APPLICATION  
Basic application  
These sub bass amplifiers can be used in any of the bi-amplification systems described in  
this manual, replacing the2channel amplifiers as pertheillustrations.  
Crossoverfrequencycontrolchecklist:  
LOW PASS:35Hzto250Hz  
SUBSONIC:15Hzto 35Hz  
BASSEQ:0to+10dB  
Interconnectcablechecklist:  
Connect the inputs to a suitable source, e.g. a head unit with good quality RCA cables.  
ConnecttheLINEOUTtotheinputs ofthesystem highs amplifier.  
Levelcontrolchecklist:  
Refertothesection “Settingupsystems after installation forbest performance”  
Use at least #12 gauge speaker wiring. The amps have dual speaker terminals,  
simplifying thehookup ofmultiple speakers.These amps aremono, 1channel, amplifiers  
which have multiple positive and negative connections for ease of wiring. The 2 positives  
arethesame internally andthe2negatives arethesame internally.  
Minimum final loudspeakerimpedance:1-Ohm.  
HFi1000D & HFi1500D  
MONO  
SUBWOOFER  
DESIGNATED  
MONO OUTPUT  
FROM HEAD UNIT  
BOOST  
HF  
HFR -3  
MIN MAXX  
TO BATTERY + 12 Volts  
VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
HFi2000D & HFi2500D  
MONO  
SUBWOOFER  
DESIGNATED  
MONO OUTPUT  
FROM HEAD UNIT  
BOOST  
HF  
REMOTE TURN-ON  
HFR -3  
MIN MAXX  
CHASSIS GROUND  
TO BATTERY + 12 Volts  
VIA FUSE  
PARALLEL MONO  
SUBWOOFERS  
2-OHMS EACH MINIMUM  
FULL RANGE  
STEREO LINE INPUT  
Y-ADAPTOR  
NOT USED  
Note: You can use the Radio/CD designated mono line output or a full range stereo line output.  
For full range stereo line output, you will need an optional “Y-Adaptor” as shown.  
6
7
SETTING UP SYSTEMS AFTER INSTALLATION FOR BEST PERFORMANCE  
HFi100.2 / HFi55.4 / HFi100.4  
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.  
2or3 way activesystems(all):  
Always start withthebass, or low frequency amplifier as areference, by turning its control uptothepoint wheredistortion is audible, andback it offsome.  
Nowadjust thelevel control for thehighs or tweeterchannels in a2wayactive system, tobalance thehighs tolows.  
In a 3 way active system, match the midrange level to the bass, and then the highs to the midrange and bass. It may be necessary to perform a few iterations of the midrange and highs level  
control settings toachieve asatisfactory sound balance.  
HFi1000D / HFi1500D / HFI2000D / HFi2500D  
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.  
Sit back and enjoy the music!  
8
TROUBLESHOOTING A SYSTEM  
Thekeytofindingtheprobleminamisbehavingsoundsystemistoisolatepartsofthatsysteminalogicalfashiontotrackdown thefault.  
DescriptionofthePROTECTsystembuiltintoallHifonicsamplifiers  
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  
LEDlighting upunderthefollowing conditions:  
1-Asort circuit ontheloudspeaker leads.  
2-Aninternal amplifier fault thatcauses aDCoffset ontheloudspeaker output.  
Shouldtheamplifier gointo protect mode, simply disconnect all RCAandspeaker leads, while keeping +12volt, powergroundandremote leads connected.  
1. Nowturntheamplifier back on, andif thediagnostic LEDlights, theamplifier has aninternal fault.  
2. Ifnot, plug theRCAcables back, andreset theamplifier. Ifit goes into diagnostic now, thefault lies in theinput, either withbadcables orsource unit.  
3. If the amplifier seems fine with RCAcables 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.  
Amplifierheatsink overheating  
Theamplifiers will shut downwhentheheatsink temperature reaches 80degrees centigrade, andturnback ononce theunit has cooled downbelow thatpoint.  
Causesofoverheating:  
1-Inadequatecooling - relocate or remount toprovide better natural airflow over thefins.  
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 outputpower  
1-Check thatlevel controls have beenset upproperly.  
2-Make sure thatthebattery voltage, as measured attheamplifier’s +12volt andgroundterminals, is 11volts or more.  
3-Check all +12volt andgroundconnections.  
Fusesblowing  
1-Theuse ofloudspeaker impedances below therecommended minimums will drawmore current - check.  
2-Ashort onthemain +12volt cable from thebattery tothevehicle chassis will cause themain fuse toblow.  
3-Ifanamplifier fuse blows continually, withonly +12volt, groundandremote leads connected, theamplifier may befaulty.  
Systemdoesnotturnon  
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, theheadunit’s +12volt andremote leads tolocalize theproblem.  
Noiseproblems  
System noise can bedivided into twocategories, hiss, andelectrical interference.  
Hiss, orwhite 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 forbest performance”  
2-Anothermajor problem thatcan cause excessive hiss, is anoisy headunit -unplug theamplifier input RCAcables, andif thehiss level reduces, thesource unit is atfault.  
Electricalinterference  
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 thenoise is still present, check thespeaker leads, if not, plug theRCA’s back, andinvestigate thesource driving theamplifier, onecomponent atatime.  
Atickingorwhine thatchangeswith engineRPM:  
1-This problem could becaused by radiation pickup ofRCAcables tooneartoafuel pump or adistributor, forinstance, - relocate cables.  
2-Check thattheheadunit groundis connected straight tothevehicle chassis, anddoes notuse factory wiring for ground.  
3-Try tosupply theheadunit withaclean +12volt supply directly from thebattery +, instead ofusing asupply from thein dash wiring/fusebox.  
Aconstantwhine:  
This type ofnoise can bemore difficult topinpoint, butis usually caused by some kind ofinstability, causing oscillations in thesystem.  
1-Check all connections, especially forgoodgrounds.  
2-Make sure thatnospeaker leads areshorting toexposed metal onthevehicle chassis.  
3-RCAcables arenotorious fortheir problematic nature, so check thatthese aregood, in particular theshield connections.  
We have also provided several videos that will help you with your battery,  
9
Maxxsonics Limited Warranty  
As the manufacturer of Maxxsonics, MB Quart, Autotek, Crunch and Hifonics car audio  
products, Maxxsonics USA Inc. Warrants to the original consumer purchaser the amplifier  
to be free from defects in material and workmanship for one (1) Year from date of purchase.  
All other parts and accessories of the system are warrantied to be free from defects in  
material and workmanship for one (1) year from date of purchase. Maxxsonics will  
repair or replace at it’s option and free of charge during the warranty period, any system  
component that proves defective in materials and workmanship under normal installation,  
use and service provided that the product is returned to the authorized Maxxsonics dealer  
from where it was purchased. A photo copy of the original receipt must accompany the  
product being returned.  
Valid purchase receipts will contain the name and address of the authorized reseller.  
Any damage to the product as a result of misuse, abuse, accident, incorrect wiring,  
improper installation, alteration of date code or bar code labels, revolution, natural  
disaster, or any sneaky stuff because someone messed up, repair or alteration out side  
of our factory or authorized service centers and any thing else you have done that you  
should not have done is not covered.  
This warranty is limited to defective parts and specifically excludes any incidental  
or consequential damages connected therewith. This warranty is not to be construed  
as an insurance policy.  
Warranty on installation labor, removal, re-installation and freight charges are not the  
responsibility of Maxxsonics USA Inc.  
Warranty products damaged as a result of insufficient or improper packing materials  
are not covered by this limited warranty and such damaged product will be returned  
“as is” at the expense of the owner.  
10  
OEM Integration  
Accessories  
MX-1 Premium High To Low Level Converter  
MX-3 Bass Controller  
* Converts High Level OEM speaker wires to Ultra Clean RCA  
Low Level Outputs  
* High Level Inputs: Accepts all types of High level Inputs  
including floating ground and high voltages up to 30 volts.  
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects  
music signals from the OEM wires and activates the MX-1. As  
an option, the module also offers a remote turn-on wire.  
* Parametric Bass EQ: Features Bass Boost, adjustable Band  
Width (wide & narrow), Low Pass and Subsonic Filter.  
* Clipping Indicators: Visually indicates audio signals Pre-Clip,  
Soft Clip and Hard Clip  
* Balanced Line Output: Ultra clean DIN variable high voltage  
output for driving mono amps.  
* Remote Output: Driver circuit to turn on amplifier when  
module activates.  
* Parametric Bass EQ: Provides a wide array of subwoofer output signal  
shaping controls to enhance bass response and sound quality including  
Bass Boost, adjustable Bandwidth (wide and narrow), Low Pass and  
Subsonic Filter.  
* Accepts a wide range of incoming music signal levels while  
accommodating all types of head units and signal processors and  
controlling the output level to the amp to maximize a signal strength up to  
9 volts.  
* Clipping Indicators: Visual clipping indicators provide indication of  
damaging clipped signals to help protect the subwoofer(s) and amplifier.  
Includes pre-clip, soft-clip and full-clip indications.  
* Music Shaping: Shapes the music signal to achieve deep bass notes as  
low as 15Hz.  
* Bass Remote: Features for subwoofer Level control with built-  
in clipping indicators.  
* Input & Output Level Control: Allows for gain matching both  
radio and amplifier audio signals.  
* Bass Remote: Included bas Remote features built-in clipping indicators  
allows direct bass control from in-dask or under-dash.  
MX-2 Deluxe High To Low Level Converter  
MX-4 Add A Sub High To Low Level Converter  
* Converts High Level OEM speaker wires to Ultra Clean RCA  
Low Level Outputs  
* Converts High Level OEM speaker wires to Ultra Clean RCA Low Level  
Outputs  
* High Level Inputs: Accepts all types of High level Inputs  
including floating ground and high voltages up to 30 volts.  
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects  
music signals from the OEM wires and activates the MX-2. As  
an option, the module also offers a remote turn-on wire.  
* High Level Inputs: Accepts all types of High level Inputs including  
floating ground and high voltages up to 30 volts.  
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects music  
signals from the OEM wires and activates the MX-4. As an option, the  
module also offers a remote turn-on wire.  
* Remote Output: Driver circuit to turn on amplifier when module * Remote Output: Driver circuit to turn on amplifier when module activates.  
activates.  
11  
Accessories  
5V  
ON  
SLAVE  
3V  
7V  
OFF  
MASTER  
35Hz  
250Hz  
1V  
9V  
15Hz  
35Hz  
TEST TONE  
65Hz  
RED - CLIP  
GREEN - 9V  
MODE  
LOW PASS  
FILTER  
OUTPUT  
LEVEL  
SUBSONIC  
FILTER  
24 dB/OCT  
24 dB/OCT MAXX-LINK  
MLX-100  
9V  
0.2V  
0
180  
0dB  
+10 dB  
30Hz  
100Hz  
INPUT  
LEVEL  
PHASE  
BOOST  
BANDWIDTH  
FREQUENCY  
PARAMETRIC BASS EQ  
-6dB  
BYPASS  
NORMAL  
RED - CLIP  
GREEN - 9V  
-20dB  
0dB  
LEVEL  
12  
PART#: A1109  

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