MTX Audio Thunder282, Thunder404, Thunder202 User Manual

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POWER

AMPLIFIER OWNER’S

MANUAL

POWER AMPLIFIER OWNER’S MANUAL

Introduction

CONGRATULATIONS...

ENGLISH

on your purchase of a new MTX Audio

 

 

Thunder Amplifier! MTX has long been the

 

industry leader in mobile enclosures and

 

speakers, and we have reached new heights

 

with the development of the new MTX

 

Thunder amplifiers. You couldn’t have chosen

 

a more reliable, powerful, or better perform-

 

ing amplifier. In fact, we back up every

 

Thunder amplifier with a three-year warranty

 

if installed by an authorized MTX Audio retail-

 

er (see the warranty statement).

Your new MTX Thunder amplifier was designed, built and thoroughly tested at our state-of-the-art electronics manufacturing facility. We manufacture every amplifier using the latest Intelligent Surface Mount Technology. Some of the advantages of the new design are its significant improvements to the amplifier’s electrical and mechanical properties. ISMT devices feature substantially shorter internal and external lead lengths. This reduces stray capacitance and inductance, which results in cleaner and more accurate musical reproduction with significantly less noise interference. The ISMT mounter produces amplifier boards with smaller and lighter components, which are more resistant to vibrations inherent in the automo-

tive environment.

A word about power ratings. It is important for you to know how they stack up. MTX has chosen the most honest, most conservative way to rate our amps. We show you the RMS power, at 12.5 volts, and dynamic power at 14.4 volts. However, we go above and beyond the call of duty. We test each amplifier. The technician records the “actual” power output, and records this number on your Certified Performance Certificate. The amplifier must meet or exceed the rated specification before we’ll ship it. No questions. No exceptions.

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

HOW TO USE THIS MANUAL

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. Sample installation diagrams may be found on our website:

mtx.com

If you have any questions, write or call us:

MTX Audio

4545 E. Baseline Rd. Phoenix, AZ 85042 602-438-4545 • 800-CALL MTX technical@mtx.com

mtx.com

Please take a moment to register your purchase on-line 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

Thunder Amplifiers are Covered by One or More of the Following United States of America Patents: #5,598,325, #5,631,608, #5,783,970

Acoustically Seamless Turn-On/Turn-Off

Adjustable Input Sensitivity

Anti-Shock PCB Mounting Design

High Powered Transformer

Intelligent Surface Mount Technology

Nickel-Plated, Heavy Duty Terminal Block Connectors

Patented PWM MOSFET Switching Power Supply

Real Time Computerized Protection Circuit

Unique Rubber Insulated Iso-Feet™

18dB/Octave Crossover

Bridgeable Circuit Design

Buffered RCA Output for Daisy-Chaining Multiple Amplifier

Color-Coded Wire Harness for Speaker-Level Input Installation

Patented Class A 100% Discrete Driver Circuit Topology

Patented Pure N-Channel Design

Smart-Engage™ Auto Turn-On for Easy Integration with Factory Head Units When Using Speaker Level Inputs

Speaker and Low Level Inputs

Input Select Switch Functions as a Built-In Y Connector (THUNDER404)

Specifications

THUNDER202

RMS Power measured at 12.5 Volts DC:

35 Watts x 2 into a 4 Ohm load with less than 1%THD 70 Watts x 2 into a 2 Ohm load with less than 1%THD

140 Watts bridged into a 4 Ohm load with less than 1%THD

Dynamic Power measured at 14.4 Volts DC:

50 Watts x 2 into a 4 Ohm load

100 Watts x 2 into a 2 Ohm load

200 Watts bridged into a 4 Ohm load

Signal to Noise Ratio: 100dB A-Weighted

Damping Factor: >200

Frequency Response: 20Hz-20kHz ± 0.25dB

Maximum Input: 2.5Vrms

Crossover: 18dB/Octave, 85 Hz, High Pass, Low Pass, or Full Range

Dimensions: 8" x 9.75" x 2.1" (20.4cm x 24.8cm x 5.3cm)

THUNDER282

RMS Power measured at 12.5 Volts DC:

45 Watts x 2 into a 4 Ohm load with less than 1%THD 90 Watts x 2 into a 2 Ohm load with less than 1%THD

180 Watts bridged into a 4 Ohm load with less than 1%THD

Dynamic Power measured at 14.4 Volts DC:

70 Watts x 2 into a 4 Ohm load

140 Watts x 2 into a 2 Ohm load

280 Watts bridged into a 4 Ohm load

Signal to Noise Ratio: 100dB A-Weighted

Damping Factor: >200

Frequency Response: 20Hz-20kHz ± 0.25dB

Maximum Input: 3Vrms

Crossover: 18dB/Octave, 85 Hz, High Pass, Low Pass, or Full Range

Dimensions: 9.4" x 9.75" x 2.1" (23.9cm x 24.8cm x 5.3cm)

THUNDER404

RMS Power measured at 12.5 Volts DC:

35 Watts x 4 into a 4 Ohm load with less than 1%THD 70 Watts x 4 into a 2 Ohm load with less than 1%THD

140 Watts x 2 bridged into a 4 Ohm load w/less than 1%THD

Dynamic Power measured at 14.4 Volts DC:

50 Watts x 4 into a 4 Ohm load

100 Watts x 4 into a 2 Ohm load

200 Watts x 2 bridged into a 4 Ohm load

Signal to Noise Ratio: 100dB A-Weighted

Damping Factor: >200

Frequency Response: 20Hz-20kHz ± 0.25dB

Maximum Input: 2.5Vrms

Crossover: 18dB/Octave, 85 Hz, (Front) High Pass or Full Range, (Rear) High Pass, Low Pass, or Full Range

Dimensions: 11.5" x 9.75" x 2.1" (29.3cm x 24.8cm x 5.3cm)

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POWER AMPLIFIER OWNER’S MANUAL

Installation

Any deviation from the connection specifications recommended may cause serious damage to the amplifier, speakers and/or vehicle electrical system. Please double-check the connection before turning the system on.

1.Disconnect the vehicle’s negative battery connection.

2.Place your Thunder amplifier at the predetermined mounting location. Using a felt pen, mark the exact position of the mounting holes on the mounting surface. Set the amplifier aside. Use a sharp, precise blade to cut small circles in the carpet and padding around the four marks denoting your mounting holes to expose the metal underneath. Use a center punch to make an indentation in the metal to ensure that you drill the exact position for the screws. Drill the four holes as marked.

3.Temporarily mount your Thunder amplifier.

4.Run a power cable from the vehicle’s battery through the firewall and through the interior of the vehicle connecting one end to your Thunder amplifier’s +BATT terminal and connect the other end to the positive post on the battery.

Note: Install a circuit breaker/fuse within 18" of the battery. This effectively lowers the risk of severe damage to your vehicle should a short circuit ever occur in the audio system. Do not install the fuse in the fuse holder until all installation steps have been completed.

5.Find a good ground spot on the vehicle’s chassis and remove the paint to reveal bare metal at the contact point. Attach the ground wire to that contact point and connect the other end of the ground wire to the GND terminal of your Thunder amplifier.

6.Connect a Remote Turn-on wire from your source unit to your Thunder amplifier’s REM terminal (14 or 16 gauge wire). If your source unit does not have a dedicated Remote Turn-on lead, you may connect to the source unit’s Power Antenna lead.

7.Connect RCA cables from your source unit to your Thunder amplifier’s RCA input jacks. If RCA (low level) output is not available, connect the included speaker (high level) connector to the speaker wires from the source unit.

8.Connect your speakers to your Thunder amplifier’s speaker terminals using 12 gauge minimum speaker cable.

9.Double-check all the previous installation steps, in particular, the wiring and component connections. Securely mount the amplifier. If everything is in order, reconnect the vehicle’s negative battery connection and begin adjusting your amplifier.

Note: Be sure that the Gain Level on the amplifier is turned all the way down (counter clockwise) before proceeding with adjustments.

Common Oversights

The battery ground should remain DISCONNECTED at all stages of installation.

Do not begin drilling until you have put your Thunder amplifier aside. Using the amplifier as a drilling guide may cause irreparable damage to the amplifier and void your warranty.

Do not route any wires underneath or outside the vehicle body.

Route signal wires (RCAs from source unit, speaker wires, etc.) away from power wires (power, ground, etc.) to avoid ground loops and other sources of noise.

Adjusting the Gain

1.Turn the gain control on the amplifier all the way down.

2.Turn up the volume control on the source unit to approximately 34 of maximum.

3.Adjust the gain control on the amplifier until audible distortion occurs.

4.Adjust the gain control down until audible distortion disappears.

5.Follow steps 3-4 for other gain control settings if applicable.

6.The amplifier is now calibrated to the output of the source unit.

Typical Speaker

Wiring Configurations

Stereo Amplifier

Bridge Mode Application

Impedance Requirement

4 ohm bridge minimum

2 ohm stereo minimum

 

 

8 ohm

 

 

 

4 ohm

 

 

 

8 ohm

 

 

 

4 ohm

 

 

 

 

 

 

 

 

 

 

 

 

 

+

- - +

 

 

+

- - +

 

 

L

L R R

 

 

L

L R R

 

 

 

AMP

 

 

 

AMP

 

Two 8 ohm Speakers

Two 4 ohm Speakers

 

 

 

 

 

 

 

not

OK ok

Troubleshooting Guide

Read this if you wanna be a do-it-yourselfer or give us a call at 800-CALLMTX.

PROBLEM

CAUSE

No LED indication

No +12V at remote connection

 

No +12V at Power connection

 

Insufficient ground connection

 

Blown power 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

Output distorted

Head unit volume set too high

 

Amplifier gain set too high

Balance reversed

Speakers wired L + R reversed

 

RCA inputs reversed

Some balance reversed

Some Speakers wired L + R

 

reversed

 

Some RCA inputs reversed

Bass is weak

Speakers wired out

 

of phase

 

Not using MTX woofers

Blowing fuses

Excessive output levels

 

Amplifier defective

SOLUTION

Supply +12V to terminal Supply +12V to terminal Verify ground connection Replace fuse

Increase volume on head unit Make speaker connections Turn up gain

Apply power to signal processor Replace speakers

Lower head unit volume

Lower amplifier gain

Wire speakers with correct orientation

Reverse RCA input

Wire speakers with correct orientation

Reverse appropriate RCA inputs

Wire with correct phase

Buy MTX woofers

Lower volume

Return for service

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MTX Audio Thunder282, Thunder404, Thunder202 User Manual

POWER AMPLIFIER OWNER’S MANUAL

1.RCA Input Jacks – These RCA input jacks are for use with source units that have RCA or Line Level Outputs. An independent set of jacks are provided on the Thunder404 for front and rear stereo inputs. A source unit with a minimum level of 200mV is required for proper operation. The use of high quality twisted pair cables is recommended to decrease the possibility of radiated noise entering the system.

2.Input Select 2CH/4CH – This switch, found on the Thunder404, is used to match the amplifier’s input to the source unit’s output so all four channels of the amplifier are driven. If your source unit has 2 outputs (left and right) connect them to the amplifier’s front channel inputs, and place the input select switch in the 2CH position. If your source unit has 4 outputs, (left front, left rear, right front, right rear) connect them to the amplifier inputs and place the input select switch in the 4CH position. In the 4CH position, the fader on your source unit will operate.

3.Speaker Level Inputs – This input will allow the amplifier to operate from source units with speakerlevel outputs. Output speaker leads from the source unit should be tied directly to the wire harness provided with the amplifier.

Wire harness color codes:

 

Grey/Black = Source units right negative (-)

White/Black = Source units left negative (-)

Solid Grey = Source units right positive (+)

Solid White = Source units left positive (+)

With the Smart-Engage™ auto-turn circuit, a remote turn-on wire is not necessary when connecting the speaker-level input wire harness to a high powered source unit. The amplifier will automatically turn on when music is received.

4.RCA Output – These RCA outputs allow for a signal to be sent to other amplifiers in a daisy-chain configuration. The RCA outputs on all Thunder amplifiers will send a full-range signal to additional amplifiers.

5.Gain Controls – These controls are used to match the input sensitivity of the amplifier to the particular source unit that you are using. The controls are factory set to 1Vrms. Note that the Thunder404 has a separate gain control for front and rear channels.

6.Crossover Select – This switch controls the type of crossover configuration that you desire. Thunder 2-channel amplifiers include a defeatable 18dB/Octave 85Hz crossover that is high pass/low pass or full range selectable. The Thunder404 4-channel amplifier includes a defeatable 18dB/octave 85Hz crossover that is high pass or full range for the front channels, and high pass, low pass or full range for the rear channels.

Input Panel Layout

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POWER AMPLIFIER OWNER’S MANUAL

1. Fuses – For convenience, all amplifiers utilize ATC type fuses. For continued protection in the event that a fuse blows, replace the fuse only with the same value.

Caution: The power fuses on the amp are for protecting the amp against overdrive. To protect the vehicle’s electrical system, an additional fuse is required within 18" of the battery on the 12V+ cable.

Thunder202 – 20 Amp

Thunder282 – 30 Amp

Thunder404 – 25 Amp x 2

2. Power Terminal – 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. See the chart below for recommended cable sizes for each amplifier. Use caution when running this cable through the car. Try to avoid the input RCA cables, antenna cabling, or other sensitive equipment as the large amount of current flowing through this cable can induce noise into your system. It is also very important to have a tight connection to ensure maximum performance.

Thunder202 – 10 Gauge

Thunder282 – 10 Gauge

Thunder404 – 8 Gauge

3.Ground Terminal – A good quality ground is required for your Thunder amplifier to operate at peak performance. A short length of cable the same gauge as your power cable should be used to attach the ground terminal directly to the chassis of the car. Always scrape or sand any painted surfaces to expose bare metal where the ground wire will attach.

4.Remote Terminal – All Thunder Amplifiers can be turned on by applying 12 volts to this terminal. Typically this voltage is supplied by a wire from the source unit marked “remote” or “electric antenna”.

5.Speaker Terminals – As shown in the wiring diagrams, be sure to observe speaker polarity through the system. Failing to wire the speakers in proper phase could result in a loss of bass response and/or poor overall sound quality. Caution: Thunder amplifiers are not recommended for loads below 2 ohms stereo or 4 ohms bridged.

6.Power LED (top of heatsink) – A lighted LED indicates that power has been applied to the amplifier. +12V from the battery to the +BATT terminal and +12V from a switched ignition or remote lead from a head unit. An unlighted LED indicates power has been removed or the amplifier has overheated. In the case of the overheat condition, the amplifier will turn back on after it cools down.

Output Panel Layout

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POWER AMPLIFIER OWNER’S MANUAL

Introduction

FRANÇAIS

(voir la garantie).

 

FELICITATIONS...

 

vous félicitant de votre achat d’un nouveau

 

amplificateur MTX Audio Thunder! MTX a été

 

depuis longtemps un leader dans l’industrie

 

d’enclos mobiles et speakers, et nous

 

sommes arrivés à un nouveau sommet avec

 

le développement des nouveaux amplifica-

 

teurs MTX Thunder. Vous n’auriez pas pu

 

choisir d’amplificateur plus fiable, plus puis-

 

sant ou meilleur. En effet ; nous garantissons

 

pendant trois ans chaque amplificateur

 

Thunder s’il est installé par un vendeur agréé

Votre nouvel amplicateur MTX Thunder a été conçu, construit et testé dans notre usine électronique de dernier cri. Nous fabriquons chaque amplificateur en employant la Technologie Surface Mount le plus récent et intelligent. Quelques advantages du nouveau dessin sont les perfectionnements aux propriétés mécaniques et électriques de l’amplificateur. Les mécanismes SMT ont de substantiellement plus courtes longueurs internes et externes. Cela réduit l’inductance et la capacitance égarées, qui résulte en une reproduction musicale plus pure et plus exacte avec considérablement moins d’intervention du bruit. Le SMT mounter produit des cartes d’amplificateur avec plus petits et plus légèrs composants qui sont plus résistants aux vibrations inhérentes dans l’environnement automobile.

Un mot au sujet d’évaluations de puissance. C’est important de savoir comment elles s’y comparent. MTX a choisi la méthode la plus honnête et la plus conservatrice d’estimer les ampères. Nous vous montrons la puissance RMS, aux 12,5 volts et la puissance dynamique aux 14,4 volts. Cependant ; nous allons au-delà l’appel de devoir. Nous testons chaque amplificateur. Le technicien enregistre la puissance de sortie ‘actuelle’, et puis il note ce nombre sur votre Certificat de Performance Attesté. L’amplificateur doit satisfaire ou dépasser les spécifications d’évaluation avant d’être envoyé. Pas de questions. Pas d’exceptions.

Nous voulons tout faire pour assurer que vous obtenez la haute performance continue de votre amplificateur MTX Thunder, donc nous vous recommandons de l’avoir installé professionellement par votre vendeur agréé.

COMMENT UTILISER CE MANUEL

Si vous installez cet amplificateur vous-même, nous vous recommandons de lire ce manuel de la première à la dernière page avant de l’installer. Familiarisez-vous avec les caractéristiques et les détails des panneaux entrée-sortie. Vérifiez que vous avez tout l’équipement dont vous avez besoin. Puis suivez les instructions d’installation point par point qui se trouvent. Vous pouvez trouver des échantillons des diagrammes d’installation sur le Web à notre site :

mtx.com

Si vous avez des questions, écrivez ou téléphonez-nous à :

MTX Audio

4545 E. Baseline Rd. Phoenix, AZ 85042 602-438-4545 800-CALL MTX technical@mtx.com mtx.com

Caractéristiques

Les amplificateurs Thunder sont couverts par un ou plusieurs des brevets suivants aux États-Unis : n° 5 598 325, n° 5 631 608, n° 5 783 970

Mise sous tension/hors tension acoustiquement transparente

Réglage de sensibilité d’entrée

Dispositif anti-choc de montage de carte

Transformateur de forte puissance

Technologie intelligente de montage en surface

Barrettes de raccordement nickelées

de haute qualité

Alimentation MLI brevetée à commutation par MOSFET

Circuit de protection à numérisation en temps réel

Pieds Iso-Feet™ isolés en caoutchouc

Filtre 18 dB/octave

Conception de circuit compatible

Sortie RCA tamponnée pour la configuration en chaîne de plusieurs amplificateurs

Faisceau de fils à codage couleur pour l’installation d’entrée au niveau haut-parleur

Topologie discrète brevetée de circuit de hautparleur 100 % classe A

Conception brevetée à canal N pur

Mise sous tension automatique Smart-Engage™ facilitant l’intégration avec les appareils sources montés en usine lors de l’utilisation des entrées haut-parleur

Entrées haut-parleur et bas niveau

Fonctions de commutation de sélection d’entrée en tant que connecteur en Y intégré (THUNDER404)

Specifications

THUNDER202

RMS Power measured at 12.5 Volts DC:

35 Watts x 2 into a 4 Ohm load with less than 1%THD 70 Watts x 2 into a 2 Ohm load with less than 1%THD

140 Watts bridged into a 4 Ohm load with less than 1%THD

Dynamic Power measured at 14.4 Volts DC:

50 Watts x 2 into a 4 Ohm load

100 Watts x 2 into a 2 Ohm load

200 Watts bridged into a 4 Ohm load

Signal to Noise Ratio: 100dB A-Weighted

Damping Factor: >200

Frequency Response: 20Hz-20kHz ± 0.25dB

Maximum Input: 2.5Vrms

Crossover: 18dB/Octave, 85 Hz, High Pass, Low Pass, or Full Range

Dimensions: 8" x 9.75" x 2.1" (20.4cm x 24.8cm x 5.3cm)

THUNDER282

RMS Power measured at 12.5 Volts DC:

45 Watts x 2 into a 4 Ohm load with less than 1%THD 90 Watts x 2 into a 2 Ohm load with less than 1%THD

180 Watts bridged into a 4 Ohm load with less than 1%THD

Dynamic Power measured at 14.4 Volts DC:

70 Watts x 2 into a 4 Ohm load

140 Watts x 2 into a 2 Ohm load

280 Watts bridged into a 4 Ohm load

Signal to Noise Ratio: 100dB A-Weighted

Damping Factor: >200

Frequency Response: 20Hz-20kHz ± 0.25dB

Maximum Input: 3Vrms

Crossover: 18dB/Octave, 85 Hz, High Pass, Low Pass, or Full Range

Dimensions: 9.4" x 9.75" x 2.1" (23.9cm x 24.8cm x 5.3cm)

THUNDER404

RMS Power measured at 12.5 Volts DC:

35 Watts x 4 into a 4 Ohm load with less than 1%THD 70 Watts x 4 into a 2 Ohm load with less than 1%THD

140 Watts x 2 bridged into a 4 Ohm load w/less than 1%THD

Dynamic Power measured at 14.4 Volts DC:

50 Watts x 4 into a 4 Ohm load

100 Watts x 4 into a 2 Ohm load

200 Watts x 2 bridged into a 4 Ohm load

Signal to Noise Ratio: 100dB A-Weighted

Damping Factor: >200

Frequency Response: 20Hz-20kHz ± 0.25dB

Maximum Input: 2.5Vrms

Crossover: 18dB/Octave, 85 Hz, (Front) High Pass or Full Range, (Rear) High Pass, Low Pass, or Full Range

Dimensions: 11.5" x 9.75" x 2.1" (29.3cm x 24.8cm x 5.3cm)

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