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MTX Audio RTX Series 300W RMS 12" Midbass Speaker - RTX128 (Each)

MTX Audio RTX Series 300W RMS 12" Midbass Speaker - RTX128 (Each)


The MTX RTX128 mid-bass is a 30cm (12”) high output loudspeaker. With very little power, it reproduces a lot of sound. These mid-bass drivers handle 300W RMS with an efficiency over 96dB. Intended for SQL installations and open door sound systems. The sound is very powerful and live. It shines with a striking realism, softness and exceptional musicality. Despite its very high efficiency, it is never brutal or aggressive. Its large 2" / 50mm coil, its aluminium phase plug to fight against standing waves, its extra large magnetic structure (Ø134mm), its fabric suspension and its pressed paper cone are all assets that help with the sound quality and transducer performance. Please note, the RTX108 is sold by piece. You therefore need two RTX108 to do right-left stereo. You must also use two MTX RTX2BT tweeters for treble.

The RTX128 is a 12" driver designed to specifically produce mid-bass frequencies. This type of speaker is ideal for use in installations that include subs producing high amounts of low frequency bass. The mid bass driver fills in the sound frequencies that the subwoofer does not.

  • Features

    • Exceptional sound quality with an incredible musicality
    • 2" / 50mm 2” giant voice coil for more power handling
    • 134mm extra large strontium magnet for a better cone control and more power handling
    • Compressed paper cone for more efficiency, softness and high quality sound
    • Treated Cloth edge suspension for a better efficiency
    • Sold by piece
    • Design to play with MTX RTX654, RTX84 midranges and RTX2BT tweeters
  • Specifications

    • RMS Power : 300W
    • Max Power : 600W
    • Impedance : 8Ω
    • Frequency response : 66Hz - 5200Hz
    • Sensitivity : 96,0 dB/2,83v/1m
    • Midrange mounting depth : 11,71cm
    • Fs : 61Hz
    • Re : 5,50Ω
    • Z : 8Ω
    • Qms : 10,37
    • Qes : 0,77
    • Qts : 0,72
    • Vas : 52,9L
    • Mms : 51,44gr
    • Cms : 0,133mm/N
    • BL : 11,86N/A
    • Sd : 530cm2
    • Vd : 0,042L
    • Xmax : 0,8mm
    • Suggested x-over point : High pass 70Hz
    • Diameter : 30cm (12")
  • Find your local installation specialist

    If a DIY solution is not appealing we recommend using only a Car Audio Masters installation network partner to assist you with your installation. We have 3 key Audiocom CAM member locations in Western Australia and over 90 members are available Australia wide. To find your nearest CAM member to assist you with your installation, visit

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