MTX Audio TA3404 - Manual (Page 3)

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 source unit
to amps 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 adaptor cables and connecting the bare wire ends to the
vehicle’s rear speakers wiring. Connect the left negative speaker wire to the green with black stripe wire on the
supplied high level RCA adaptor. 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 channels of a
4-channel amplifier, 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 and/or poor overall sound quality.
These amps will have eight speaker terminals, front left and right positive and negative and rear left and right
positive and 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 Front and Rear (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.
No front and rear gain matching is required if the Dual Mono feature is on. Use the rear gain control only for
adjusting the gain for all channels.
• 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. The Dual Mono feature is must be on. Use the rear gain control only for adjusting
the gain for all channels.
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.
1. +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.