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Settings, Power and Speaker connections :

TX2275

TX2450

Thank you for purchasing an MTX Audio TX2 amplifier. Proper installation matched with MTX speakers and subwoofers provide superior sound
and performance for endless hours of waking the neighbors. Congrats and enjoy the ultimate audio experience with MTX !

Thank You !

Specifications :

• 4-Channel Class-AB wide range amplifier
• CEA2006 certified Power Output :
  - 4x75W RMS @2Ω and THD+N ≤1%
  - 4x50W RMS @4Ω and THD+N ≤1%
  - 2x150W RMS bridged @4Ω and THD+N ≤1%
• Crossover :
- High pass 12dB/oct, variable from 50Hz to 120Hz
  - Low pass 12dB/oct, variable from 50Hz to 120Hz
• Signal-to-Noise Ratio (1 Watt) : > 73dB
• THD+Noise (Distortion) (1 Watt) : ≤ 0,2%
• Frequency Response (±1dB) : 10Hz-60000Hz
• Maximum Input Signal : 6V
• Maximum Sensitivity : 200mV
• Dimensions : 220x135x52mm
• High level inputs
• Optional EBC remote control (EBC-1)

• 2-channel Class-AB wide range amplifier
• CEA2006 certified Power Output :
  - 2x110W RMS @2Ω and THD+N ≤1%
  - 2x75W RMS @4Ω and THD+N ≤1%
  - 1x220W RMS bridged @4Ω and THD+N ≤1%
• Crossover :
  - High pass 12dB/oct, variable from 50Hz to 120Hz
  - Low pass 12dB/oct, variable from 50Hz to 120Hz
• Signal-to-Noise Ratio (1 Watt) : > 74dB
• THD+Noise (Distortion) (1 Watt) : ≤ 0,18%
• Frequency Response (±1dB) : 10Hz-60000Hz
• Maximum Input Signal : 6V
• Maximum Sensitivity : 200mV
• Dimensions : 180x135x52mm
• High level inputs
• Optional EBC remote control (EBC-1)

Adjusting the gain
1. Turn the gain control on the amplifier all the way down (counter clockwise).
2. Turn up the volume control on the source unit to approximately 3⁄4 of maximum.
3. Adjust the gain control on the amplifier until audible distortion occurs.
4. Adjust the gain control down until audible distortion disappears.
5. The amplifier is now calibrated to the output of the source unit.

X-Over Switch (X-Over) :
In “LP” position, the active low pass (LP) x-over is turned on. Use this position for subwoofer application.
In “HP” position, the active high pass (HP) x-over is turned on. Use this position for speaker application.
In “Off” position, the x-over is turned off. The amp is in wide range mode.

X-Over Frequency Control (Frequency) : Used to select the desired x-over frequency. The frequency is adjustable from 50Hz to 120Hz.

Speaker level inputs (High Inputs) : This input will allow the amplifier to operate from source units with speaker-level outputs. Output speaker
leads from the source unit should be tied directly to the wire harness provided with the amplifier.
Note : When speaker level inputs are used, a remote turn on wire mustbe used to switch the amplifier on and off.

External Bass Control Port (Remote) - The Subwoofer Level Control Remote (EBC) plugs directly into this port, while the EBC itself can be placed
anywhere in the vehicle for on demand bass adjustments. Attention, the EBC is optional. You can purchase it separately (Reference : EBC-1).

PowerOn LED (Power) : The LED illuminates green when the amp is switched on.

Protection LED (Protec.) : The LED illuminates red when the amp is in short circuit or thermal protection.

Ground Terminal (GND) : A proper ground is required for your amplifier to operate at peak performance. A short ground cable the same diameter
as the power cable should be used to attach the ground terminal directly to the chassis of the vehicle. Always remove paint, dirt or debris to
expose bare metal where the ground will be attached.

Remote Terminal (REM) : The amplifier can be turned on by applying 12 volts to this terminal. Typically this voltage is supplied by a wire from
the source unit marked “remote” or “power antenna”.

(+12V) Power Terminal (12V) : This is the main power input for the amplifier and must be connected directly to the positive terminal of the
vehicles battery for proper operation. Use caution when installing (+12) power cable in the vehicle. Avoid running this cable parallel with RCA
cables, antennas, or other sensitive equipment due to massive currents that can induce noise into the audio system. It is also very important to
have a tight, secure connection for maximum performance. MTX recommends using 8~10mm2 power wire with the MTX TX2275 and TX2450.

Speaker Terminals (Speaker Output) : Connect speakers to these terminals. Ensure correct polarity, positive-to-positive (+/+) and negative-to-
negative (-/-). Reversing the polarity strongly degrades the bass level and the sound quality.
Bridge Mode :
TX2275 : When bridging the amplifier, use the Ch.1 positive terminal and the Ch.2 negative terminal only.
TX2450 : When bridging the amplifier, for the two first channels, use the Ch.1 positive terminal and the Ch.2 negative terminal only. For the two
following channels, take the Ch.3 positive terminal and the Ch.4 negative terminal.
Warning : do not bridge the amplifier with an impedance lower than 4Ω.

RCA Inputs (Input) : These RCA inputs are used with source units that have RCA or Line level outputs. (Source units need a minimum level of
200mV output for proper operation of the amplifier).
MTX recommends only high quality twisted pair cables (such as MTX ZNX) to decrease the possibility of radiated noise entering the system.

Gain Control (Gain) : The gain control matches the input sensitivity of the amplifier to the source unit being used. The operating range varies
from 200mv to 6V.

TX2275

TX2450