MTX Audio TA3404 User 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.