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Dear Customer,
Congratulations on your purchase and welcome to the world’s finest brand
of car audio. Through years of critical testing procedures and hand
craftsmanship, MA Audio has created a wide range of products that reproduce
music with all the clarity and richness you deserve. The MA audio Digital
amplifier is responsible for numerous dB Drag, USAC & IdBL World
Records. This amplifier is more than capable of sending your subwoofers back
to the factory for repair, so please take caution when using this amplifier. Do
not let this would of caution make you afraid of using this amplifier, it is
solely stated for you to respect the power it can make.
For maximum performance we recommend you have your new MA
Audio product installed by an Authorized MA Audio Dealer. Please read
your warranty and retain your receipt and original carton for possible
future use.
To learn more about MA Audio products and the current World Records held,
please visit us on the world wide web at:
www.MaAudio.com
!!! CAUTION !!!
In order for this competition amplifier to perform correctly, a investigation
of the vehicle electrical system must be made to ensure proper safety
requirements are met. This amplifier can draw in excess of 400A of current
under normal operation. An aftermarket alternator and/or additional deep cycle
batteries are required in order to safely power this amplifier. Failure to do so
will result in destroying your vehicles electrical charging system. Please have
a certified MECP installer review the electrical charging system of your
vehicle before attempting to install this amplifier on your own. If you have any
questions about this precaution, please review your owner’s manual for more
information.
!! Attention !!
Continuous, excessive exposure to sound pressure levels in excess of 85 dB
can cause a loss in hearing. While Ma Audio sound systems are capable of
producing sound pressure levels greater than 85dB,they are also designed for
enjoyment at reasonable levels. Please observe all local sound ordinances
while listening to your Ma Audio sound system
Table of Contents
SPECIFICATIONS……………………………………………………………1
FEATURES & CONTROLS ...…………………………………………….....2
POWER CONNECTIONS………………………………….....………………3
RCA CONNECTIONS.............…………….…………………………….……4
SUBWOOFER CONNECTIONS…….……………………………………….5
SUBWOOFER WIRING DIAGRAMS………………………………….........6
TROUBLESHOOTING…………………………………………………….…8
WARRANTY……………………………………………....……………...…10
NOTES…………………………………...……………………………….….11
WARNING.......................................................................................................12
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SPECIFICATIONS
• Model HK-4000D
• RMS Power @ 14.4V
4 Ohm 50W
2 Ohm 3600W
• RMS Power @ 17.0V
4 Ohm 75W
2 Ohm 4000W
• Signal to Noise Ratio >96dB
• THD Level
4 Ohm 0.05%
2 Ohm 0.5%
• Frequency Response 10Hz - 350Hz
• 24dB Low Pass Filter 50Hz - 350Hz
• 24dB Subsonic Filter 15Hz - 50Hz
• Bass Boost Control at 45Hz 0 - 18dB
• RCA Input Sensitivity 0.2 - 8V
• Low level Input Impedance 22K Ohms
• Damping Factor 200 @ 4 Ohm
• Dimensions (W x H x D) 12.4” x 2.71” x 25.86”
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FEATURES & CONTROLS
RCA Line Input Jacks:
To be connected to a line driver, crossover or head unit via RCA Cables.
RCA Line Output Jacks:
For connecting additional amplifiers using a daisy chain effect.
Remote Socket:
External Remote Controller for Sub Level Control.
24dB Subsonic Filter Control:
P ermits a 24dB per octave high pass filter between 10-50Hz
24dB Low Pass Variable Control:
Adjustable low pass crossover frequency from 50Hz – 350Hz
0-18dB Bass Boost Control:
The Bass Boost control is used for a 0-18dB gain at 45Hz for extra bass punch.
Input Gain Level Control
For adjusting the output of the amplifier to the input of the source unit.
Adjustment range is from 0.2V to 8.0V
Power LED:
The Blue color LED indicates that the power is on.
Protection LED:
The Red color LED indicates fault condition of amplifier.
When a f ault condition occurs such as an overload, excessive heat or short circuit of speaker
terminals, the protection circuit is engaged to protect both the subwoofers and amplifier.
Parallel Mode:
This Digital Amplifier has a Parallel Mode (Strapped)
This function is used to generate an extreme amount of output power by combining two
amplifiers together to power the same voice coil.
MAS TER AMP - When using this option, the master amp has control over the slave amp.
SLAVE AMP - When using this option, the slave amp has no control.
The slave amp only role is for increasing total output power.
Power Connection:
Connects +12V DC power wire from battery source to amplifier.
Ground Connection:
Connects the Ground wire of amplifier to the chassis ground.
Remote Connection:
Connects the remote wire allowing the amplifier to be turned on/off by the head unit.
Speaker Terminal:
It allows the co nnection of a speaker to the amplifier.
External Remote Accessory:
Used for remote subwoofer level control via harness from amplifier
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Power CONNECTIONS
The +12V and Ground wires must be 0 AWG or larger. Using smaller wire than 4 gauge will
cause excessive heat and melt the wire insulation. In addition, the +12V remote control wire must
between 12-16AWG.
!!! CAUTION !!!
In order for this competition amplifier to perform correctly, a investigation of the vehicle
electrical system must be made to ensure proper safety requirements are met. This amplifier can
draw in excess of 400A of current under normal operation. An aftermarket alternator and/or
additional deep cycle batteries are required in order to safely power this amplifier. Failure to do
so will result in destroying your vehicles electrical charging system. Please have a certified
MECP installer review the electrical charging system of your vehicle before attempting to install
this amplifier on your own. If you have any questions about this precaution, please review your
owner’s manual for more information.
+12V Power
This wire is connected directly to the positive battery terminal of a battery. Ensure that the +12V
cable is fused with a minimum of a 300 amp in line fuse. The +12V wire must be 0 AWG or larger
Ground
This connection must be completed using spade lug with insulating sleeve. This wire is the
electrical ground and must be fastened securely to the vehicle’s chassis. The best method is to use
a threading sheet metal screw or a existing large factory bolt. Ensure that all paint coating or other
insulation is remove d from bolt area. Always use the least amount of cable as possible. The
Ground wire must be 0 AWG or larger.
Remote
Many aftermarket head units have a remote turn on lead for turning on amplifiers. If your head
unit does not have a remote turn-on lead, please contact the manufacturer of your head unit for
other options when installing additional amplifiers.
Caution
The +12V and Ground wires must be 0 AWG or larger. Using smaller wire than 4 gauge will
cause excessive heat and melt the wire insulation. In addition, the +12V remote control wire must
between 12-16AWG. Always connect the +12V wire first followed by the Ground wire and finally
the remote wire. Furthermore the +12V wire must always be fused at the battery for protection
against possible damage.
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RCA CONNECTIONs
Speaker CONNECTION
Amp Configuration
WIRING SUBWOOFERS
When using a single amplifier to power one subwoofer, the Positive and negative terminal of the
Subwoofers voice coil is connected the positive and negative terminal of the Amplifier.
CAUTION
Always check your speaker load with a multi-meter before hooking up to the amplifier.
These digital amplifiers are only 2 ohm stable. Any Impedance (load) smaller than 2 ohm will
damage the amplifier. Such Damage is not covered under warranty either, so pay strict attention to
what connections are made to the amplifier.
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TROUBLE SHOOTING
SYMPTOM
NO SOUND.
CHECK POINT
Is the power LED illuminated?
CURE
1. Check fuses in amplifier.
2. Be sure Turn-on lead is connected.
3. Check signal leads.
4. Check gain control.
5. Check Tuner/Deck volume level.
6. Clean contacts on fuse holders.
CHECK POINT
Is the Overload LED illuminated?
CURE
Check for speaker short or amplifier overheating.
SYMPTOM
AMP NOT SWITCHING ON.
CHECK POINT
No power to power wi re.
CURE
Repair power wire or connections.
Check point
No power to remote wire with Head Unit on.
CURE
Check connections to radio.
Check point
Fuse broken.
CURE
Replace Fuse.
SYMPTOM
NO SOUND IN ONE CHANNEL.
CHECK POINT
Check Speaker Leads.
CURE
Inspect for short circuit .
Check for open Connection.
CURE
Check Speaker Leads Reverse Left and
Right RCA inputs to determine i f it is
occurring before the amp.
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TROUBLE SHOOTING continued...
SYMPTOM
AMP TURNING OFF AT MED/HIGH VOLUME.
CHECK POINT
Check Speaker load impedance.
CURE
Inspect that speaker load impedance recommendations are
followed. Check wiring configuration for speakers.(To Verify
proper load impedance, use an OHM meter to measure the total
load for each channel of the amplifier.
SYMPTOM
SYSTEM PROTECTION LED IS LIT
CHECK POINT
Temperature Shut -down.
CURE
Check for proper air ventilation
Change amplifier location
CHECK POINT
Speaker output shorted.
CURE
Check speaker wiring
Check for blown speaker by disconnecting
one at a time and check for LED change.
??Need More Technical Support??
Please Visit The Technical Support Page at:
www.MaAudio.com
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LIMITED WARRANTY INFORMATION
• Length of Warranty
1 year on Video Products 2 years on Electronic Products 2 years on Speakers
• What is covered
Warranty applies only to MA Audio products sold to consumers by Authorized MA Audio
Dealers in the United States of America or its possessions. Products purchased by consumers
from Authorized MA Audio Dealer outside of the USA are covered only by that country’s
distributor.
• Who is covered
This warranty covers only the original purchaser of MA Audio product purchased from an
Authorized MA Audio Dealer in the United States. For a list of Authorized Internet Re tail Stores
go to http://www.MAAudio.com. In order to receive service, the purchaser must provide MA
Audio with a copy of the receipt stating the customer name, MA Audio Authorized dealer name,
product purchased and date of purchase. Products found to be defective during the warranty
period will be repaired or replaced (with a product deemed to be equivalent) at MA Audio’s
discretion.
• What is Not Covered
1. Damage caused by accident, abuse, improper operations, water, or theft.
2. Any cost or expense related to the removal or reinstallation of product.
3. Repair Service performed by anyone other than MA Audio’s Repair Department.
4. Any product which has had the serial number defaced, altered, or removed.
5. Any product purchased outside the United States.
6. Any product not purchased from an Authorized MA Audio Dealer.
• Limit on Implied Warranties
Any implied warranties including warranties of fitness for use and merchantability are limited
in duration to the period of the express warranty set forth above. Some states do not allow
limitations on the length of an implied warranty, so this limitation may not apply. No person is
authorized to assume for MA Audio any other liability in connection with the sale of the product.
• How to Obtain Service
1. Please call (310) 223-0400 for MA Audio Customer Service.
Customer Service hours : Monday-Friday, 8am-5pm Pacific Standard Time.
2. Obtain a RA # (Return Authorization Number) from Customer Service.
3. Obtain a “Cashiers Check” or “Money Order” for $9.00 per item for return postage.
(No personal Checks will be accepted)
4. Once you receive your return authorization number from our Warranty Department,
please print this number LARGE on the outside of the packaging.
5. No products will be accepted without a Return Authorization number.
6. Please include the following items with the returned product:
a. Copy of the Original Receipt of purchase (Required)
b. Cashiers Check or Money Order for $9.00 per item
c. Return Address for shipment .
7. Ship to:
MA Audio
Warranty Department
18601 South Susana Road
Rancho Dominguez, CA 90221
RA#:_______________
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noteS
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WARNING
Investigate the layout of your automobile thoroughly before drilling or cutting any
holes. Use extreme care when you work near the gas tanks, gas or hydraulic lines,
and electrical wiring. Always make sure the power amplifier is securely mounted.
Mounting the amplifier securely to the automobile will prevent damage to the car or
injury to a person, particularly in the event of an accident.
Don’t mount the system so that the wire connections are unprotected or are subject
to pinching or damage from nearby objects.
The +12 VDC power wire must be fused at the battery positive terminal
connection. Before making or breaking power connections at the system power
terminals, disconnect the + 12V wire at the battery. Confirm your head unit and/or
other equipment is turned off while connecting the input RCA jacks and speaker
terminals.
If you need to replace the amplifier fuses, replace it only with a fuse identical to
that supplied with the system. Using a fuse of different type or rating may result in
damage to this system which isn’t covered by the warranty.
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