MTX Audio MXA4002 User Manual

INTRODUCTION

CONGRATULATIONS...

on your purchase of a new 2-Channel MTX Audio amplifier! MTX is one of the inventors of mobile audio, having designed the first-ever in-vehicle enclosed subwoofer system in the early 80’s. Our award-winning heritage speaks for itself, 14 Innovations Design and

Engineering Awards, more than 80 AutoSound Grand Prix Product of the Year Awards, more than 500 World Records or 1st Place Finishes in Sound Competitions. Also, MTX is the first USA audio Company to be awarded ISO9001 quality assurance certification.. MTX manufacturing methods are world-class, with more than 1,000,000 square feet of dedicated manufacturing facilities, using State-of-the-Art Intelligent Surface Mount, Rotational Molding, Robotic Assembly and CNC manufacturing equipment. What all this means to you, the music and audio fan, is that you couldn’t have chosen a more reliable, powerful, or better performing amplifier. The Audio Performance Dyno Certificate is your proof. Your amp will meet or exceed its rated spec, or it doesn’t ship. No compromises, no excuses.

All power ratings are not created equal. CEA 2006 Compliance ensures that the power of this amplifier is measured according to strict standards dictated by the Consumer Electronics Association.

We want to ensure you get continuous high performance from your MTX amplifier, so we recommend that you have it professionally installed by your authorized MTX dealer.

If you are installing this amplifier yourself, we recommend that you read the manual cover-to- cover before you install it. Familiarize yourself with the features and details on the input and output panels. Make sure you have all the equipment you need. Then follow the step-by-step installation instructions included.

If you have any questions, call us at 800-CALL MTX, or use our live help at www.mtx.com

MTX Audio

4545 E. Baseline Rd. Phoenix, AZ 85042

602-438-4545 • [e-mail]

Please take a moment to register your purchase online at mtx.com. Please also record the serial number of your amplifier in the space provided below and keep this manual for future reference, as well as your sales receipt as proof of ownership. (The serial number

of your amplifier is marked on the bottom of its metal chassis.)

Serial Number:

Date of Purchase:

FEATURES

•Patented state-of-the-art power supply and output stage

•High mass extruded aluminum heatsink for maximum thermal management and bulletproof reliability

•Adjustable HP/LP Crossover - 40Hz-350Hz, 12dB/oct for maximum system design flexibility

•Stereo Gain Control for precision matching between your amplifier and radio

•Fully adjustable Bass Boost - 40Hz, 0-18dB to enhance the low frequency experience in your vehicle

•Remote subwoofer level control included allows you to fine tune the bass from the driver’s position when you switch between different musical styles

•High Level Input with patented Smart Engage Auto Turn-on for easy installation with factory radios

•CEA 2006 Compliant. All power ratings are not created equal. CEA 2006 Compliance ensures that the power of this amplifier is measured according to strict standards dictated by the Consumer Electronics Association.

SPECIFICATIONS

		MXA2002	MXA3002	MXA4002	MXA6002
	RMS per channel
	@ 4Ω (≤ 1%	50 Watts	75 Watts	100 Watts	150 Watts
	THD+N)
	RMS per channel
	@ 2Ω (≤ 1%	100 Watts	150 Watts	200 Watts	300 Watts
	THD+N)
	RMS bridged
	channels @ 4Ω	200 Watts	300 Watts	400 Watts	600 Watts
	(≤ 1% THD+N)
	Signal to Noise	80 dBA	80 dBA	80 dBA	80 dBA
	Ratio
	Frequency	20Hz to 20kHz	20Hz to 20kHz	20Hz to 20kHz	20Hz to 20kHz
	Response	(-3dB)	(-3dB)	(-3dB)	(-3dB)
	Maximum Input	5V	5V	5V	5V
	Signal
	Maximum	100mV	100mV	100mV	100mV
	Sensitivity
	THD+N	<0.25%	<0.25%	<0.25%	<0.25%
	(Distortion)	(reference:1W	(reference:1W	(reference:1W	(reference:1W
		output)	output)	output)	output)

2

INSTALLATION

Disconnect the ground at the vehicle battery before proceeding.

1. Connect the amplifier to the battery

For maximum amplifier performance, we suggest 4 gauge wire and a 1 Farad stiffening capacitor. A fuse or circuit breaker is required at maximum distance of 18” from the battery to protect the battery, the vehicle, and more importantly you. (see attached chart for proper fuse ratings) It is highly recommended that installation be carried out by an authorized MTX dealer or Circuit City.

2. Connect the amplifier remote turn-on

Connect the remote input terminal of the amplifier to the remote output terminal of the source unit (only if using RCA inputs) to establish amplifier remote on/off through the power on/off of the source unit. If the source unit does not provide a remote output, connect to a switched 12-volt source, e.g. ignition switch.

3. Connect the amplifier ground to the vehicle chassis

For maximum amplifier performance we suggest 4 gauge wire. Find a solid piece of metal and scrape the paint away where the ground will be attache (NO FACTORY BOLTS). Connect the ground cable to the amplifier at this point.

- NOTE -

For optimum performance and sound reproduction, prepare and secure the ground properly. Remove any surface material before securing to your chassis, ensuring a metal-to-metal

ground point.

4. Remote Gain Control

Included is a remote gain control, which is a volume control that is active with the low pass filter engaged. This control should be mounted near the driver in an easily accessed location. This is not a gain knob, this is a level control. The level control will attenuate the amp or increase its output to the level of the gain setting. It is used to adjust bass output between music sources or tracks(see picture below for connection location).

5. Connecting signal cables to the amplifier

There are two ways to supply the signal to our amplifiers. To get maximum performance, we suggest connecting a high quality RCA to the corresponding outputs at the source unit and inputs of the amplifier. If a source unit is being used without RCA outputs, use the high-level inputs for signal which will turn the amplifier on via our Smart Engage circuitry (Four-channel amps will only engage on the front high-level inputs).

6. Reconnect the battery ground to the vehicle battery

Double check all the previous installation steps. Make certain the wiring and component connections are securely attached to the amp +BATT, remote and ground. If everything is in order, complete the installation by reconnecting the battery ground to the vehicle battery.

4

WIRING DIAGRAM (CHARGING SYSTEM)

1 Farad Stiffening Capicitor

WIRING DIAGRAM (5.1 SURROUND SOUND EXAMPLE)

6

WIRING DIAGRAM (SINGLE 4-CHANNEL AMPLIFIER SYSTEM)

WIRING DIAGRAM (MULTI AMPLIFIER SYSTEM)

8

SYSTEM TUNING (INPUT GAIN ADJUSTMENT)

Located on the Input Panel, the objective of input GAIN adjustment is to match the output of the source unit with the input of the amplifier. The output voltage of individual source units can vary.Some source units have an output of 200 mV and others have 5 Volts or more. To cater to these variations, the amplifier has an adjustable gain level that ranges from 100 mV to 5 volts. Adjusting this control requires some experimenting. Basically, you want all the gain at the beginning of the system, NOT at the end (amplifier). Turn your source unit up and keep your amplifier gains at the minimum lowest possible setting

(counter-clockwise) with maximum output. This will give you the best sound and s ignal-to-noise ratio.

Besides better sonic reproduction, proper input gain also helps to prolong the reliability span of your amplifier by eliminating excessive internal temperature generated by

incompatible source unit output and amplifier input.

Note : Turning the input gain up does not indicate more power. Just more noise. The input gain control is not a power control. If everything is in order, complete the installation by reconnecting the battery ground to the vehicle chassis.

If the Remote Gain is used, connect the plug of the Remote Gain to the port on the panel of the amplifier.

1.Turn the Input GAIN all the way down (counter clockwise).

2.Set the volume control of the source unit to approximately 3/4 of its maximum output.

3.Turn the balance control of the source unit to its center position (flat).

4.Leave the tone (bass/treble) controls at their usual position.

5.Play a CD or tape track with great dynamic range.

6.Use the Bass Boost Control on the amp to enhance the bass performance (if desired), not the bass on the head unit.

7.To locate the optimum gain setting, ask the person assisting you to turn the Input GAIN control clockwise until audio distortion starts to develop. Turn the gain control back wards slightly to minimize the distortion.

8.If you constantly switch between CD/tape and radio, you will need further adjustment since radio output level differs from that of CD or tape. In this case, you need to locate a balanced gain setting which is best for both the output level of radio and the CD.