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 with 1% or less
Total Harmonic Distortion plus noise (THD+N). Signal-to-Noise ratio is measured
in weighted absolute decibels (dBA) at a reference of 1 watt. CEA-2006 allows
consumers to compare car amplifiers and receivers on an equal basis. Measured
under CEA-2006 conditions the MTX Road Thunder RT250D is rated at 250 watts RMS
x 1 channel into a 2-ohm load and 150 watts RMS x 1 channel into a 4-ohm load,
the signal to noise ratio is 75 dB.
Mono-Block Amplifier: The MTX Road Thunder RT250D is designed
with specific features to power your subwoofer or subwoofers with a frequency
range between 20 to 200 Hz. This amplifier is not designed to power a full-range
Adaptive Class D Technology: While typical Class D amps tend
to generate high frequency energy that must be filtered to prevent harmonic
interference in the FM radio frequency range, Adaptive Class D Technology
directs the amp's switching energy away from FM radio ranges as the amp's load
and output increase. This improves the amp's overall signal-to-noise ratio and
eliminates interference generated by more common Class D amps.
Protection Circuits: The RT250D provides Thermal and
Gain: The rotary gain control is continuously variable from
250 mV to 5 V.
Bass Boost: The amplifier's bass boost is adjustable from
0-12dB at 40Hz.
Sub-Sonic Filter: This amp features a 12dB/octave Sub-Sonic
Filter, adjustable from 20 to 50 Hz. Ultra-low frequencies that cannot be reproduced
by the subwoofer do not become sound but unnecessary oscillations, which affect sound
by causing distortion. These frequencies also waste amplifier power and can cause
damage to the speakers. Setting the Sub-Sonic Filter between 20 and 50 Hz removes
the frequencies below the respective frequency to improve the performance of the
speakers by eliminating harmful distortion.
Crossover: The RT250D features a 12 dB/octave crossover,
continuously variable from 40 to 200 Hz to match the frequency response of your
connected subwoofer(s). The crossover is always engaged (it cannot be bypassed).
Remote Bass Knob: A wired External Bass Control (EBC) is
included with the MTX RT250D. The EBC connects to the amplifier using the supplied
17' RJ-25 cord, it's designed to mount under your vehicle's dash within arm's length
so its easily accessible to the driver. The approximate dimensions are:
- Width: 1-9/16" (2-5/8"
including the mounting tabs)
- Height: 3/4"
- Depth: 1-1/2" (2" including
the knob and wiring)
Power/Ground/Turn-On: The RT250D features set-screw terminals
for Power, Ground and Remote turn-on. The Power and Ground terminals will accommodate
up to 4 gauge wire (which MTX recommends), while the Remote turn-on lead will accept
up to 10 gauge wire.
Line Level Input: MTX recommends using the RCA type inputs
with a line-level signal when possible.
Speaker Level Input: The RT250D comes with two
speaker level to RCA adapters, making it easier to add an amplifier to a factory
radio or to an aftermarket receiver with no preamp outputs.
Speaker Connections: The amplifier is equipped with set-screw
speaker terminals; they will accommodate up to 8 gauge wire.
EBC: The RJ-25 port (phone type connection) is for the included
Fuse: The amplifier is equipped with one ATO type 30 amp
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