User guide
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Owner’s Manual - TH1200.1D
Installation & Mounting
MTX recommends your new THUNDER amplier be installed by an Authorized MTX retailer. Any deviation from
specied installation instructions can cause serious damage to the amplier, 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 amplier. Keep in mind there should be sucient air ow for
proper cooling. Mark the mounting holes from the amplier 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 amplier.
3. Install a positive (+) power cable from the vehicle’s battery through the rewall using a grommet or rewall
bushing to avoid cable damage from sharp edges of the rewall. Run the cable through the interior of the vehicle
and connect it to the amplier’s +BATT 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 7.87 in of the battery. This eectively 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 o or the
fuse is taken out of the fuse holder until 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 amplier.
6. Connect a Remote Turn-on wire from the source unit to the MTX amplier’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 amplier : 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 amplier.
• 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 amplier’s speaker terminals using the right gauge speaker wire. Your MTX
amp can drive a 1 ohm minimum load for max power.
9. Double check all previous installation steps, in particular, wiring and component connections. Once veried,
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 amplier should be turned all the way down (counter clockwise) before proceeding
with adjustments.