Features
Controls
Connections
Warranty

Features

CEA-2006 Compliant: CEA-2006 is a system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for determining an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured into a 4-ohm load, with 1% or less Total Harmonic Distortion plus noise (THD+N), and at a frequency range of 20 Hz to 20,000 Hz when applicable. Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4-ohms. CEA-2006 allows consumers to compare car amplifiers and receivers on an equal basis. The MTX Road Thunder RT604 under CEA-2006 regulations is rated at 60 watts RMS x 4 channels with an 80 dBA signal to noise ratio.

2-Ohm Stable: The RT604 is capable of handling load impedances down to 2-ohms in stereo; the amplifier is rated at 90 watts RMS x 4 channels into 2-ohms with no more than 1% THD+N.

Bridgeable: The front and rear sections of the amp are independently bridgeable; the bridged output is 180 watts x 2 channels at 4-ohms (or 180 watts x 1 and 60 watts x 2 if only one half of the amp is bridged).

Protection Circuits: The RT604 provides Thermal and Short-circuit protection.

Controls

Gain: The front and rear sections of the amp have independent gain controls. Each rotary knob is continuously variable from 100 mV to 6 V.

Crossovers: The crossovers are also independent for the front and rear amplifiers:

• Mode: front and rear 3 position switches; High Pass, Low Pass, Full Range
• High Pass: front and rear rotary controls; 40 Hz to 400 Hz
• Low Pass: front and rear rotary controls; 40 Hz to 400 Hz

Connections

Power/Ground/Turn-On Connections: The RT604 features set-screw terminals for the Power, Ground and Remote turn-on leads. The Power and Ground terminals will accommodate up to 4 gauge wire, the Remote turn-on terminal will accept up to 8 gauge wire.

Speaker Connections: The amplifier is equipped with four set-screw speaker terminals. The terminals will accommodate up to 8 gauge speaker wire.

Line Level Inputs: MTX recommends using the front and rear RCA type line-level inputs if possible.

Speaker Level Input: Use the included front and rear speaker level input harnesses if the connected radio has no preamp outputs.

Fuse: The amplifier is equipped with two ATO type 30 amp fuses; they're located under a cap on the bottom panel.

Warranty

5 Year Warranty Terms: This product carries a 5-Year Prorated Warranty with the following terms:

• Years 1-2: Products found to be defective in materials or workmanship during the first two years will be, at Mitek's option, repaired or replaced by Mitek at no charge. The warranty period does not renew, but continues on from the original date of purchase.
• Years 3-5: The purchase price of an item which becomes defective after the first two years and prior to the end of the warranty period will be prorated and credited toward the purchase of a new MTX product. The amount of proration is determined by dividing the original purchase price by the number of months in the warranty period (60), then multiplying the result by the number of months remaining in the warranty period.