MTX Audio Car Amplifier TA2301 User Manual

TA2301 Owners Manual  
Introduction  
Thank you for choosing MTX to help reach your ultimate goal with your vehicle. Adding MTX amplifiers and  
matching MTX speakers and subwoofers with StreetWires connections will put you in a better position to  
hear, feel and experience all of the music the artist intended you to hear.  
Specifications  
Primary Ratings:  
Power Output: 150 Watts RMS x 1 Channel at 4 Ohms and 1% THD+N  
Signal-to-Noise Ratio (1Watt): 73dB  
Secondary Ratings  
Power Output: 300 Watts RMS x 1 Channel at 2 Ohms and 1% THD+N  
THD+Noise (Distortion) (1Watt): .5%  
Frequency Response (-3dB): 20Hz-120Hz  
Maximum Input Signal: 10V  
Maximum Sensitivity: 100mV  
Dimensions: 9-5/8” x 12-11/16” x 2-1/2” (245mm x 325mm x 65mm)  
Smart Engage Auto Turn-on (Patent No: US06556683)  
Patented Adaptive Class D Technology (Patent No: US06753729)  
Patented Power Supply (US05598325)  
Input Sensitivity Switch: 100mV-1V/1V-10V  
Crossover: Low @ 80Hz, 24dB or 120Hz, 24dB  
ThunderEQ Boost 12dB, Freq. 40Hz (Switchable)  
Remote Subwoofer Level Control  
Features  
1. Prizm EFX – All MTX amplifiers include backlit adjustment controls on top surface of product.  
Color – The backlit controls offer unlimited colors on the display -- from RED, GREEN, BLUE, or any color in  
between.  
EFX – You can switch Prizm EFX lighting to “pulsate” with beat of music.  
2. Xtant Technology Cooling (XTC) – thermal-regulated turbo-charged inner cooler, supplies fan forced cool  
air evenly and constantly through tightly packed, bonded fins. Fan speed is continuously variable and  
controlled by amplifier’s output load, temperature of heatsink and transformers. Exhaust of internal heatsink is  
strategically positioned to cool transformers to maintain maximum performance at all volumes.  
3. Bi-Level Inputs with Smart Engage – All MTX amplifiers feature RCA type input connections. All MTX  
amplifiers allow both high level and line level input into the RCA type input connections.  
Low Level Input – All MTX amplifiers feature RCA type input connections. Source units with an output  
signal level of 100mV–10V may be used. See “Input Sensitivity” for proper voltage level setting.  
High Level Inputs with Smart Engage – All MTX amplifiers allow high level inputs through RCA type input  
connections using provided high level adapters. Source units with an output signal level of 100mV–10V may  
be used. See “Input Sensitivity” for proper voltage level setting.  
Smart-Engage" Auto-turn-on: is an auto-turn-on circuit included within the amplifier. A remote turn-on  
wire is not necessary when connecting the amplifiers high-level input to a high-powered source unit (Car  
Stereo). The amplifier will automatically turn on when music is received through this type of connection.  
Note: Smart engage is only active on the left input.  
4. Input Sensitivity –The input sensitivity switch is used to set the proper input voltage range:  
X1 POSITION: 100mV – 1V (Typically for RCA Input)  
X10 POSITION: 1V – 10V (Typically for Speaker Level Input)  
 
2. Speaker Wire Connections –  
When installing the speaker wires, please take proper measures to protect them. For example, when  
connecting the door speakers, the speaker wire should run from the amplifier’s output terminals, under the  
carpet and through the factory rubber boot (loom) that protects the wires in the inner door jam. If the factory  
boot cannot be used, take other measures to protect these wires. Sometimes the door has to be completely  
removed to use the factory boot. If this is something that you do not feel comfortable doing, please ask a  
professional to help you.  
When connecting the speaker wires to the amplifier please observe the printed polarity markings on the  
amplifier’s StreetWires connector. Failing to wire the speakers in proper phase could result in a loss of bass  
response and/or poor overall sound quality.  
These amps will have two PARALLELED speaker terminals, a positive and negative for a single woofer and  
OPTIONAL second set of positive and negative terminals for a two woofer configuration. These amps can  
drive a minimum of a 2-ohm load.  
Note: Please pay attention and make sure the speakers or woofers are the correct IMPEDANCE (OHMS) BEFORE  
attaching to the amplifier.  
3. Power Terminals – When installing the power wires, please take proper measures to protect them as best you  
can. For example, when running the power cable from the vehicle’s battery through the firewall, use a firewall  
bushing for protection. Continue running the power wire through the interior of the vehicle under the carpet  
and to the amplifier. If this is something that you do not feel comfortable doing, please ask a professional to  
help you. Be sure to lay the power wire away from all signal cables.  
When connecting the power wires to the amplifier please observe the printed markings on the amplifier’s  
StreetWires power connector. Failing to wire the power cables properly could result in amplifier damage.  
+12V: This is the main power input for the amplifier and must be connected directly to the positive  
terminal of the car battery for the amplifier to operate properly. It is important that a main fuse is installed a  
maximum of 18” from the battery.  
GND: This is the ground connection for the amplifier and must be connected directly to the metal chassis  
of the vehicle for the amplifier to operate properly. A properly grounded amplifier can be run harder and  
longer then a poorly grounded amplifier. The ground on the amplifier should be as short as possible and  
be connected directly to the vehicle’s metal chassis. Do not connect to Factory bolts of ANY kind. When  
attaching the ground to the chassis, sand all the paint away from the contact point, a grounding block like the  
StreetWires GT4 should be used whenever possible, this piece of equipment has 5 times the surface area a  
normal screw has.  
The gauge of the power and ground wire is often an overlooked aspect of amplifier installation. The more  
power the amplifier receives, the more power it will produce. Power cables have a natural resistance, and  
will lose voltage by the time the power makes its way to the amplifier. The larger gauge (diameter) wire will  
hold more voltage over longer runs. Also by having a larger diameter ground wire, the amplifier can run  
more efficiently. MTX recommends using a minimum of 8 gauge power and ground cables to get the best  
performance.  
REM: This connection turns the amplifier on and off and needs to be connected to a remote Turn-on wire  
from your source unit if you are using a low level input connection.  
Note: When numerous amplifiers are used in the same system, look into using a relay with a separate power wire  
connected to an alternative power source to take the strain off the source unit. Normal source units can only  
keep a constant 12 volts to 2 maybe 3 amps. This wire should also be run on the away from the RCA cables.  
Double check all the previous connection installation steps, in particular, the speaker and power wiring.  
Securely mount the amplifier. If everything is in order, reconnect the vehicles negative battery connection and  
begin following the feature setup and adjustment steps.  
 
Feature Setup and Adjustments  
1. Selecting The Input Sensitivity Range – Before you turn on your system, you must select the proper input  
sensitivity range on your amp using the button labeled INPUT SENS located in the GAIN CONTROL section of  
the control panel.  
Setting for aftermarket Source Units: Refer to your aftermarket owner’s manual for line level output  
specification. If the specification is not available, please follow the instructions listed below.  
X1 POSITION: 100mV – 1V (Typically for RCA Input)  
Setting for factory (OEM) Source Units: To check the amount of voltage that is present from the source  
unit, take a multi meter, or a volt/ohm meter, on the A/C setting, (range from 100mv up to 10 volts) attach the  
positive and negative leads directly to any exposed speaker. It will not matter if the polarity is correct, it will  
read the same amount of voltage.  
X10 POSITION: 1V – 10V (Typically for Speaker Level Input)  
Note: It is important not to have the amp set up to receive a low voltage signal and give it a high voltage signal.  
Doing this can cause damage to the amp.  
2. Adjusting The Mono Gain Control – Before you start setting your amp gains, be sure to defeat all “EQ’s” (“off”  
position). You want to set the gain levels properly BEFORE applying any equalization.  
Start with the source unit’s volume around ¾ of the way up, and the gain on the amp all the way down  
(counterclockwise). Slowly increase the gain clockwise until the speaker starts to distort. Immediately  
decrease gain until the distortion goes away. This will be a good reference point on the volume control to  
where the signal starts to distort. Remember every CD will be different, use common sense and constantly  
listen for obvious distortion and adjust volume accordingly. The gain on the amp has nothing to do with how  
much power the amp can produce, just how fast the amp puts out max power. Just like in an automobile, full  
throttle is very rarely needed.  
3. Adjusting the Low @ 80Hz, 24dB or 120Hz, 24dB Selectable Low Pass X-over Frequency Switch–  
Setting For Subwoofers: First set the electronic crossover by selecting the “80Hz” position or the “120Hz”  
of the X-OVER switch. By selecting the “80Hz” setting, the amp crosses the signal over at 80Hz with a 24dB/  
Oct roll off. Meaning the signal tapers off fairly quickly at frequencies over 80Hz. By selecting the “120Hz”  
setting, the amp crosses the signal over at 120Hz with a 24dB/Oct roll off. Meaning the signal tapers off fairly  
quickly at frequencies over 120Hz.  
4. Adjusting The Fixed ThunderEQ – Depress the BASS BOOST button located in the PROCESSOR section of the  
control panel to supply 12dB of a 40Hz bass boost to enhance the low frequency response of your system.  
Depress the BASS BOOST button to achieve a smooth flat response on in the low frequency range.  
5. Remote Subwoofer Level Control (Remote Sub) – Lets say the amplifiers gain is set at half way, when the  
remote subwoofer level control is plugged in, you now have external control of the gain from zero – half way.  
The installation of this level control is NOT necessary to get full power from amplifier.  
Note: One Remote Subwoofer Level Control can control two or more amplifiers using a mini plug Y adaptor.  
6. Prizm EFX – Now that you have completed adjusting all your amplifier settings, you can set the lighting effects  
to you personal taste.  
Selecting Colors: You can change the backlit colors simply by turning the Pot labeled PRIZM COLOR  
located in the MTX PRIZM EFX section of the control panel left or right. Starting at the most counter clockwise  
position, the colors range from RED, GREEN, BLUE, and RED again or any color in between making the  
combination unlimited.  
Selecting The EFX Feature: You can switch Prizm EFX lighting to “pulsate” with beat of music. Simply  
Depress the button labeled PRIZM EFX located in the in the MTX PRIZM EFX section of the control panel to  
turn this feature on or off.  
 
Trouble Shooting  
Read this if you want to be a do-it-yourselfer or give us a call at 800-CALLMTX.  
PROBLEM  
CAUSE  
SOLUTION  
No LED indication  
No +12V at remote connection  
No +12V at Power connection  
Insufficient ground connection  
Blown power fuse  
Supply +12V to terminal  
Supply +12V to terminal  
Verify ground connection  
Replace fuse  
LED on, no output  
Volume on head unit off  
Speaker connections not made  
Gain control on amplifier off  
Signal processing units off  
All speakers blown  
Increase volume on head unit  
Make speaker connections  
Turn up gain  
Apply power to signal processor  
Replace speakers  
Output distorted  
Balance reversed  
Bass is weak  
Head unit volume set too high  
Amplifier gain set too high  
Lower head unit volume  
Lower amplifier gain  
Speakers wired L + R reversed  
RCA inputs reversed  
Wire speakers with correct orientation  
Reverse RCA input  
Speakers wired out  
phase  
Not using MTX woofers  
Wire with correct of phase  
Buy MTX woofers  
Blowing fuses  
Excessive output levels  
Amplifier defective  
Lower volume  
Return for service  
 

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