MTX Audio TA7804 specifications Installation Mounting, Connections

Disconnect the vehicle’s negative battery connection. Any deviation from the recommended connection procedures may cause serious damage to the amplifier, speakers, and/or vehicle electrical system. Please double check the connections before turning the system on.

Installation

Mounting

Place your Thunder amplifier at the predetermined mounting location. Use a felt pen to mark the exact position of the mounting holes on the mounting surface. Set the amplifier aside. Then with a sharp, precise blade 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.

Note: Please use common sense and make sure that all vehicle wires, gas lines, brake lines, etc. are clear and will not interfere with the installation. ALWAYS WEAR PROPER SAFETY GLASSES.

Connections

1.Bi-Level Inputs (Low/High Level Input) with Smart Engage™ – Both a low and high level signal can be used. Be sure to lay the signal wire away from all power cables and vehicle computers. Use high quality twisted pair interconnect cables to decrease the possibility of radiated noise entering the system.

•Using RCA Connections: If the source unit has RCA outputs, simply attach a signal cable from the source unit to the amp’s RCA input. This will provide signal to the amp.

•Using Speaker Level Connections: If the source unit does not have RCA outputs, a high level signal can be used instead by taking the supplied high level RCA adapter cables and connecting the bare wire ends to the vehicle’s rear speaker wiring. Connect the left negative speaker wire to the green with black stripe wire on the supplied high level RCA adapter. Connect the left positive speaker wire to the solid green wire. Do the same for the right speaker connection using the purple wire. Now plug the RCA connectors located on opposite end of the supplied high-level RCA cables into the amp’s inputs. When connecting the front channel, use the included grey and white high level RCA adapter cables. The grey wire is used for the front left and the white wire is used for the front right.

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 or poor overall sound quality.

These amps will have eight speaker terminals: front left positive, front left negative, front right positive, front right negative, rear left positive, rear left negative, rear right positive, and rear right negative.

•Stereo (4-channel) Connection: This configuration is typically used with full range or high frequency speakers. Each channel can drive a minimum of a 2 ohm load.

•Front Stereo/Rear Bridged (3-channel) Connection: This configuration is typically used with full range speakers connected to the front outputs and subwoofer(s) connected to the rear outputs. Each front channel can drive a minimum of a 2 ohm load. The rear bridged configuration can drive a minimum of a 4 ohm load.

•Bridged (2-channel) Connection: This configuration is typically used with subwoofers. Both the front and rear outputs can be bridged individually and each can drive a minimum of a 4 ohm load.

•Dual Mono (1-channel) Connection: This configuration is typically used with subwoofers. All channels can be combined for max power (both the front and rear outputs can be bridged together) and 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 – Please take proper measures during installation to protect the power wires 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. Run 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.