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TH K2 II A CORO Kit | 300 W Peak Power | Kit 2 way 4 ohm | TH 1.5 II Violino + TH 6.5 Sax

TH K2 II A Coro is designed to transfer the precious musical message of the Thesis electronics with absolute fidelity, with the ambition to be absolutely transparent, leaving room only to the emotion evoked by the music. The search for the best acoustic result was based up on overcoming the intrinsic limits of traditional loudspeakers. Through a finite element simulation software (FEM) conceived by the Audison R&D team, a mathematical model was developed, which they used to create, with an intense prototyping activity, the ideal transducer.

The versatility of the TH 1.5 II and TH 6.5 II provides the ability for the user to set the crossover cut in a very wide range according to his preferences. This is possible thanks to the exceptional extension of the tweeter frequency response towards the medium frequencies (800 – 22 kHz) and to the very regular response of the woofer at medium-high frequencies (up to 4 kHz). Thanks to this versatility we have designed two cut-off options.

Technical Specs

Woofer Size 165 mm
Tweeter Size 38 mm
Woofer Voice Coil Diameter 50 mm
Crossover Type 34
Cone Material Woofer TPX®
Dome Material Tweeter
Power Handling - Peak 300 W
Power Handling - Continuous 150 W
Sensitivity 87 dB
Impedance 4 Ohm
Frequency Response 40 Hz ÷ 26 kHz
Woofer Cone Diameter 130 mm
Xmax Woofer 5.4 mm

Electric-acoustic Specs

Re Woofer 3.8 Ohm
Fs Woofer 55 Hz
Le Woofer mH @ 1 kHz 0.43
Vas Woofer 8.6 l
Mms Woofer 24.2 g
Cms Woofer 0.35
Bxl Woofer 8.2
Qts Woofer 0.43
Qms Woofer 5.3
Qes Tweeter 0.83
Spl Woofer 87 dB


Weight Woofer 1.25 kg
Weight Tweeter 0.355 kg


THG 1.5 II
THG 1.5 II
THG 1.5 II optional mesh grilles dedicated to TH 1.5 Violino can be defined with only one word: unique. They are made with finest steel without any compromise, to overcome the absolute.
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THG 6.5 II
THG 6.5 II
THG 6.5 II optional mesh grilles can be defined with only one word: unique. They are made with finest steel without any compromise, to overcome the absolute.
Read more


TH 1.5 II Violino


  • 34 mm CCAW single layer voice coil combining lightweight, stability at lower frequencies, and total absence of musical transients compression.
  • Extremely powerful custom N38 “H-grade” Neodymium magnet providing 1.67 T*m in the magnetic gap for superb dynamic response and very low distortion in the whole frequency range.
  • The exclusive air-loading system results in a resonance frequency below  800 Hz, for filter set-up, starting as low as 1.5 kHz – 12dB/Oct.
  • 38 mm natural silk dome optimized with extensive material characterization, laser vibrometer scanning, and Finite Element Analysis methods for a smooth and extended response.
  • Frequency response up to 26 kHz optimized for off-axis installation.
  • TH 1.5 II Violino Tuning System features two types of electro-acoustic load: bottom case or bottom disk according to targets of highest performance as well as the flexibility of in-car integration.
  • Full solid metal construction structure with each part exclusively designed and produced for the Audison TH 1.5 II.
  • FEM (Finite Element Method) optimized faceplate and front spokes for an improved dispersion pattern.

TH 6.5 II Sax

  • 50 mm mobile voice coil in CCAR (Copper Clad Aluminum Ribbon)  wound with flat wire to maximize the force factor and heat dissipation.
  • Low inductance of the mobile voice coil to optimize the emission in the medium-high band (2-3 kHz).
  • N48 “H-grade” neodymium magnet with superb thermal stability to  guarantee an optimal dynamic reserve in every situation.
  • Magnetic group geometry was designed using finite element simulation software to maximize efficiency by concentrating the magnetic field in  the gap.
  • The membrane is made of TPX®, a transparent material that reduces the frequency response irregularities in the mid-high band, leaving the speaker interior in full view.
  • Membrane geometry was designed using simulation software, to obtain a  smooth emission over all the listening angles.
  • The basket is made of a single piece of die-cast aluminum featuring four pairs of spokes to optimize heat transfer, nullify turbulent airflows and ensure maximum structural rigidity.
  • Hi-excursion suspension and spider, optimized with simulations of the loudspeaker multi-physical behavior.

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