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Installation & Mounting
MTX recommends your new RoadTHUNDER amplifier be installed by an Authorized MTX retailer. Any devia-
tion from specified installation instructions can cause serious damage to the amplifier, speakers and/or vehicles
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, brake 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 through the firewall using a grommet or firewall
bushing to avoid cable damage from sharp edges of the firewall. Run the cable through the interior of the vehicle
and connect it to the amplifier's (+12V) 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 20cm 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 circuitbreaker is switched off or the fuse
is taken out of the fuse holder untill all connections are made. Now connect your positive power cable to the
positive battery terminal of the battery.
5. Grounding - Locate a proper ground point on the vehicle's chassis and remove all paint, dirt or debris to reveal
a bare metal surface. Attach the ground wire to that contact point. Connect the opposite end of the ground wire
to the (GND) terminal on the MTX amplifier.
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. Connecting signal cables to the amplifier : There are two ways to supply the signal to your MTX amp.
• To get maximum performance, we suggest connecting a high quality RCA to the corresponding outputs at the
source unit and inputs of the amplifier.
• If a source unit is being used without RCA outputs, use the included high-level amplifier's speaker terminals
using the right gauge speaker wire.
8. Connect your speakers to your MTX amplifier's speaker terminals using the right gauge speaker wire. Your MTX
amp can drive a 2Ω minimum load for max 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.
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