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1996-2013 Hertz Mille 6.5" Speaker Upgrade

12.00 LBS


Product Info

The  coax tweeter concentric to the woofer of the MPX 165.3 coaxial speakers  allows for one single linear-phase emission point, for a natural timbre providing a detailed sound stage. Thanks to the “Center Tuning Duct” geometry, the tweeter resonance frequency is especially low and the employment of damping materials for the inside provides for a linear acoustic emission. The acoustic lens optimizes its off-axis response and the 36 mm diameter woofer generates deep and controlled bass frequencies.


Power Handling - Peak W


Power Handling - ContinuousW




Frequency response Hz

45 ÷ 21,5k

Sensitivity dB SPL


Woofer size mm (in.)

165 (6.5)

Tweeter size mm (in.)

25 (1)

Woofer Voice Coil Ø mm (in.)

36 (1.42)

Tweeter voice coil Ø mm (in.)

20 (0.8)

Woofer magnet

High density flux ferrite

Tweeter magnet


Woofer cone

Pressed-pulp cone with cotton fibers

Tweeter dome





  • CONCENTRIC COAXIAL TWEETER: built in the woofer voice coil, achieving one single point of emission, to re-create the virtual sound-stage like in live music performances.
  • TWEETER SUPPORT WORKING AS A REAR CHAMBER: sized for low Fs, to ensure a well damped high pass frequency roll-off, allowing low cut-off frequency crossover point.
  • 36 MM PURE COPPER WOOFER VOICE COIL: wound on a Polyamide former, for outstanding power handling and dynamic compression-free reproduction.
  • PRESSED-PULP CONE WITH COTTON FIBERS: combining stiffness and lightweight for a wide frequency response. Cone profile geometrically refined to perfectly match with the tweeter emission ensuring phase consistency in the crossover area.
  • “BOUNDARY FREE” RUBBER SURROUND: for improved efficiency and wider midbass frequency. (Logo Boundary Free)
  • OVER-SIZED FERRITE MAGNET: combined with very low carbon content iron plates, for low distortion at high power levels.
  • BASKET: low mounting depth, acoustically transparent aluminium alloy basket with elegant diamond cutting and featuring the aluminium Hertz logo.
  • ANTI-VIBRATION RUBBER MAGNET COVER: to damp spurious vibrations.

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Product Reviews

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  1. Great upgrade for my 2012 FLHX 5 Star Review

    Posted by on 12th Sep 2018

    I purchased these speakers based upon both the reputation of Hertz and Biketronics I'm very happy with them. Install was quick and simple following in the included instructions and using the supplied Biketronics adapter rings and hardware. I'm using an Aquatic HU and Rockford amp to drive them. The sound is very impressive, very loud with strong mids and highs. I'm now looking in to doing bag lids to add to this incredible sound.

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