www.mtx.com - www.mtx.eu.com
Owner’
s Manual - R
T250D
Installation & Mounting
MTX recommends your new RoadTHUNDER amplifier be installed by an Authorized MTX retailer. Any deviation 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 8" 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 connect using the included high-level speaker terminals and the
proper 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 2 ohm 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.
