MTX TX665S picture


TX6 Separate speakers Ø16,5cm 6.5" 2-way 90W RMS 620W Peak 4Ω with aluminum frame, Ø30mm TSV TIL voice coil and Ø28mm silk dome tweeter


The MTX TX665S (6.5" 2-way separate 4Ω 90W RMS 620W Peak) are high-end coaxial speakers. They can handle a huge power and you can't imagine the sound quality they can produce. They are equipped with all the best: MTX aluminum chassis for optimal rigidity, aluminum phasing warhead to neutralize standing waves, pressed paper membrane for more musicality, detail and warmth, magnet giant for incredible power handling, extra-large 30mm diameter TSV TIL coil for detail at all levels and power handling thanks to better cooling, phenomenal neodymium magnet tweeter and 28mm silk dome in diameter for a soft and dynamic sound, external passive filter with esoteric components (ultra musical polypropylene capacitors, unsaturated air coils), rubber suspension to handle large deflections while remaining reliable.
The TX665S shines with exceptional construction. Its sound quality is breathtaking (It is at the level of TX8). Its price remained at the T6/TX6 level.


  • Exceptional construction and sound quality, esoteric level
  • Treated paper cone coated with glass particles for more musicality
  • Top level TSV TIL 30mm voice coil for efficient cooling and a burst response
  • Extra large strontium magnet (90x40mm) for a better control and more power handling
  • Die-cast aluminum frame for more rigidity and less vibration
  • Ø28mm neodymium tweeter with exceptional quality silk dome for more details
  • Passive filter with esoteric components: Air coils and polypropylene capacitors
  • Aluminum phase plug to eliminate standing waves
  • Soft and musical listening with a very deep, precise bass and a detailed midrange


  • 2-way separate speakers
  • Diameter: 16,5cm (6.5")
  • Peak power: 620W 3000 cycles
  • RMS power: 90W
  • Sensitivity: 93.5dB/2.83v/1m
  • Impedance: 4Ω
  • Response: 40Hz - 28000Hz
  • 28mm silk dome tweeter with neodymium magnet
  • Woofer depth: 66mm
  • Ø28mm silk dome tweeter
  • Grils included

Recommended efficient associations

RFL4120 RFL5300 TX480D TX2275 TX2450 amplifiers


  • Best results with RFL4120 or RFL5300 class-AB amplifiers (those using Sanken grade Hifi transistors).
  • Best used at the front. For the rear, the TX669C will be perfect.
  • Very good results with the passive x-over. The tweeter 6dB/Oct soft slope opens up the stagin and make an easy connexion with the woofer.
  • Its clarity and power handling allow it to be combined with one or two 30cm 12" or 38cm 15" subwoofers.


MTX wants you to enjoy your hearing for a long time. Excessive exposure to loud volumes can damage your hearing. The United States Department of Labor recommends not exceeding the following recommendations:

  • 90dB: maximum 8 hours / day
  • 92dB: maximum 6 hours / day
  • 95dB: maximum 4 hours / day
  • 97dB: maximum 3 hours / day
  • 100dB: maximum 2 hours / day
  • 102dB: maximum 90 minutes / day
  • 105dB: maximum 60 minutes / day
  • 110dB: maximum 30 minutes / day
  • 115dB: maximum less than 15 minutes / day
  • 120dB: immediate danger, 0 minutes / day





It is essential to use the passive x-overs to obtain the best sound quality and to protect the speakers. Be careful, without a x-over, the tweeters burn.

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What the press says about it...

Car&Hifi (DE)

"Test Winner"

"Price/Performance ratio: outstanding"

"The TX665S is very cheap and really good"

"very high build quality"

"The TX665S woofer scores with a large 30mm TIL voice coil, an aluminium phase plug and a coated paper cone"

"MTX is also generous ... with an extra-large 28mm silk dome tweeter"

"The crossover is among the best in the test, with large air-core coils and MKP capacitors"

"In terms of measurements, we love the TX665S"

"The bass driver has an exemplary amplitude response and comparatively low distortion"

"The bass driver runs cleanly and can also be loud"

"The sound quality is right and fun"

"The x-over is exemplary : core-less coils made of thick wire, proper polypropylene capacitor and a level adjustment without tiny computer jumpers"

"At MTX the mid-bass unit runs exemplary with smooth amplitude response"

MTX around the world

MTX - Mitek Europe

23 rue des Apennins 75017 Paris
Tel : +33 1 42 28 72 52 -
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