Thunder Marine WET75.4 - Receiver MTX Audio - Free user manual and instructions

Frequently Asked Questions - Thunder Marine WET75.4 MTX Audio

USER MANUAL Thunder Marine WET75.4 MTX Audio

OWNER'S MANUAL WET SERIES AMPLIFIERS

PRODUCT INFORMATION

Model#

Serial #

Dealer's Name

Date of Purchase

INTRODUCTION

Thank you for purchasing this MTX Audio Hi-Performance marine grade amplifier. Proper installation matched with MTX speakers and subwoofoers provide superior sound and performance for endless hours of enjoyment on your boat wherever the current takes you. Congratulations and enjoy the ultimate audio experience with MTX!

FEATURES

• Compact Size
  Double Sided PCB
• Surface Mount Components
  MOSFET Design
  LPF and HPF Crossover
• Adjustable Bass Boost
• Noise Free Design
• Short, Thermal, and High/Low Voltage Protection
• Conformal Coated PCB
• Plexiglass Cover for Controls
• Stainless Steel Hardware
  Rubber Gaskets Around RCA Connectors

CONTROL FUNCTIONS

1. Speakers - Connect speakers/subwoofoers to these terminals. Be sure to check wire for proper polarity. Never connect the speaker cables to the chassis ground.
2. +BATT (+12 Volt Power) - Connect this terminal through a FUSE or CIRCUIT BREAKER to the positive terminal of the vehicle battery or the positive terminal of an isolated audio system battery. WARNING: Always protect this power cable by installing a fuse or circuit breaker of the appropriate gauge within 18 inches (45cm) of the battery terminal connection.
3. Remote Turn On - This terminal turns on the amplifier when (+) 12 volt is applied to it. Connect it to the remote turn on lead of the head unit or signal source.
4. GND - Run an equal gauge wire from the Ground (GND) terminal on the MTX amplifier to the negative terminal on the battery. Use the shortest distance possible. It is always a good idea to replace the factory ground at this time with a cable equal or larger than the new amplifier power cable. CAUTION: Do not connect this terminal directly to the vehicle battery ground terminal or any other factory ground points.
5. RCA Input Jacks - These RCA input jacks are for use with source units that have RCA outputs. 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.

6. Gain Control - The Gain control will match the amplifier's sensitivity to the source units signal voltage. The operating range is 5V to 200mV. NOTE: This is NOT a volume control.

7. Low Pass Filter Control (Mono Block) - This control is used to select the desired low pass x -over frequency. The frequency can be adjusted from 40Hz to 220Hz for all bass mono models.

8. Subsonic Filter Control (Mono Block) - This control can filter out unwanted low frequency from 20Hz (OFF) to 50Hz. This function should only be used with vented enclosures.

9. Bass Boost Level Switch (Mono Block) - This switch can boost bass level by 0dB, 6dB, or 12dB. The boost frequency is centered at 50Hz.

10. High Pass Filter (Full Range) - This controls the frequencies played for the front channels. Low frequencies can be cut off from OFF to 200Hz. At OFF position, no low frequencies cut off, meaning full range.

11. X-Over Mode and Frequency Control (Full Range) - These controls allow control over the frequencies played for the rear channels. There is an option for Low Pass, Full Range, or High Pass. In LP or HP mode, the crossover frequency can be tuned from 50Hz to 750Hz.

12. Power Indicator - This LED will light up when the amplifier is working properly.

13. Protection Indicator - The Red LED will light up and flash if there is a fault presented to the amplifier. Please disconnect the amplifier and resolve the fault before reconnecting the amplifier.

PANEL LAYOUT

4-Channel Amplifier Panel Layout

PANEL LAYOUT

2 Channel Amplifier Panel Layout

WET75.2

PANEL LAYOUT

Mono Block Amplifier Panel Layout

WET500.1

WIRING DIAGRAM

See page 26 for amplifier wiring diagrams.

INSTALLATION AND MOUNTING

MTX recommends your new Thunder Marine WET Series amplifier be installed by a 12 volt installation specialist. Any deviation from specified installation instructions can cause serious damage to the amplifier, speakers and/or vehicle's electrical system. Damage caused from improper installation is NOT covered under warranty. Please verify all connections prior to system turn on.

1. Disconnect the vehicle's negative battery cable.
2. Determine the mounting place for your MTX amplifier. Keep in mind there should be sufficient air flow for proper cooling. Mark the mounting holes from the amplifier to be drilled. Before drilling make sure all vehicle wires, gas lines, and gas tank are clear and will not interfere with installation. Drill the desired holes and mount the MTX amplifier.
3. Install a positive (+) power cable from the vehicle's battery. Run the cable through the vehicle and connect it to the amplifier's (+BATT) terminal. Do not connect to the battery at this time. NOTE: Use only proper gauge wire for both positive and negative connections.
4. Install a circuit breaker or fuse within 18 inches of the battery. This effectively lowers the risk of severe damage to you or your vehicle in case of a short circuit or accident. Make sure the circuit breaker is switched Off or the fuse is taken out of the fuse holder until all connections are made. Now connect your positive power cable to the positive battery terminal of the battery.
5. Grounding - Run an equal gauge wire from the Ground (GND) terminal on the MTX amplifier to the battery compartment. Once installation is complete you will attach this cable to the negative battery terminal on the battery in step 9.
6. Connect a Remote Turn-On wire from the source unit to the MTX amplifier's (REM) terminal. If the source unit does not have a dedicated Remote Turn-On lead, you may connect to the source unit's Power Antenna lead.
7. Supply the signal to your MTX amplifier by connecting the signal cables using high quality RCA to the corresponding outputs at the source unit and inputs of the amplifier.
8. Connect your speakers to your MTX amplifier's speaker terminals using the correct gauge speaker wire. Your MTX Thunder Marine amp can drive a 2 minimum load for optimum power.
9. Double check all previous installation steps, in particular, wiring and component connections. Once verified, reconnect the vehicle's negative battery cable, turn the circuit breaker On or place the fuse in the fuse holder.

NOTE: Gain Levels on the amplifier should be turned all the way down (counter clockwise) before proceeding with adjustments.

INSTALLATION

For proper performance and safety, MTX recommends installing an inline fuse per the owner's manual instructions according to the following.

WET500.1 60A Fuse
WET75.2 30A Fuse
WET75.4 60A Fuse

TROUBLESHOOTING

Problem Cause Solution
No LED Indication	No +12V at Remote Connection Supply	+12V to Terminal
	No +12V at Power Connection Supply	+12V to Terminal
	Insufficient Ground Connection Verify	Ground Connection
	Blown Power Fuse Replace Fuse
Power LED On, No Output	Volume on Source Unit Off Increase Volume on Source Unit
	Speaker Connections Not Made Make	Speaker Connections
	Gain Control on Amplifier Off Turn Up Gain
	Signal Processing Units Off Apply Power to Signal Processor
	All Speakers Blown Replace Speakers
Output Distorted	Head Unit Volume Set Too High Lower Head Unit Volume
	Amplifier Gain Set Too High Lower Amplifier Gain
Balance Reversed	Speaker Wire L & R Reversed	Correct Speaker Wire Orientation
	RCA Inputs Reversed Reverse RCA Inputs
Bass is Weak	Speakers Wired Out of Phase	Wire Speakers with Correct Phase
	Not Using MTX Subwoofer	Buy MTX Subwoofer
Blowing Fuses	Excessive Output Levels	Lower the Volume
	Amplifier Defective	Return for Service

SPECIFICATIONS

Model WET500.1 WET75.2 WET75.4
Description 500 W RMS Mono 2x	75 W RMS 4 x 75 W RMS
RMS Power at 14.4V
1Ω Load NA NA NA
2Ω Load 500 W RMS 2x 100W RMS	S 4 x 100 W RMS
4Ω Load 300 W RMS 2 x 75 W RMS	S 4 x 75 W RMS
Features
Input Level 0.2 - 5V 0.2 - 5V 0.2 - 5V
Frequency Response 20Hz - 220Hz	15Hz - 25kHz	15Hz - 25kHz
Low Pass Filter (LPF)	40Hz - 220Hz	50Hz - 750Hz (Rear)	50Hz - 750Hz (Rear)
High Pass Filter (HPF)	NA	50Hz - 750Hz (Rear)	10Hz - 200Hz (Front) 50Hz - 750Hz (Rear)
Subsonic Filter	20Hz - 50Hz	NA NA
THD at 4Ω, 1W	<0.3%	<0.05%	<0.05%
Signal-to-Noise Ratio	>75dB	>78dB	>78dB
Bass Boost	0 - 6dB - 12dB Switchable	NA NA
Best Efficiency at 4Ω	>80%	>60%	>60%
Minimum Load	2Ω	2Ω	2Ω
External Bass Control (EBC) Optional Remote	Yes NA	NA
Low Voltage Protection	Yes, Protect <8V	Yes, Protect <8V	Yes, Protect <8V
Short Circuit Test @ Max Power	Pass	Pass	Pass
Overheat Protect Temperature	Protect at 80°C / 176°F	Protect at 80°C / 176°F	Protect at 80°C / 176°F
Components & PCB	SMD Parts / Double Sided FR-4 PCB	SMD Parts / Double Sided FR-4 PCB	SMD Parts / Double Sided FR-4 PCB
Dimensions
Height	2.25" (56.5mm)	2.25" (56.5mm)	2.25" (56.5mm)
Width	6.31" (160mm)	6.31" (160mm)	6.31" (160mm)
Length	9.02" (229mm)	9.45" (240mm)	12.21" (310mm)

INFORMACION DEL PRODUCTO

Número de modelo

Numero de série

THUNDER1000.1 - Fusivel 100A WET500.1 - Fusivel 60A WET75.4 - Fusivel 60A

SOLUTION DE PROBLEMAS

INFORMATIONS SUR LE PRODUIT

Modèle

NOTE: Equivalent parallel woofer load cannot be less than the minimum load rating. The two negative terminals are paralleled inside the amplifiers, as are the two positive terminals. These are monoblock amplifiers, not multi-channel amplifiers. The minimum load for the WET500.1 amplifier is 2Ω.

WET75.4 Amplifier Wiring (4-Channel Mode)

WIRING DIAGRAM

WET75.4 Amplifier Wiring (3-Channel Mode)

WIRING DIAGRAM

WET75.2 Amplifier Wiring (2-Channel Mode)

NOTES:

CN535

©2014 Mitek Corporation. All rights reserved. MTX is a trademark of Mitek Corporation. Designed and Engineered in the U.S.A.

Due to continual product development, all specifications are subject to change without notice.

MTX Audio, 4545 East Baseline Rd. Phoenix, AZ 85042 U.S.A.

MTX004714 RevB 4/14 21A10167-AW0014695