Audison Thesis TH K2 II A CORO Sax Violino 2 Way Active Component Kit 150w RMS

The Audison Thesis TH K2 II A Coro is a 6.5-inch 2-way active component kit, pairing the TH 1.5 II Violino 38mm silk dome tweeter with the TH 6.5 II Sax woofer, rated at 150W RMS (300W peak) at 4 ohms. It is part of the Audison Thesis range and is designed for actively processed systems driven by a DSP and separate amplifier channels.

This listing is the active version. For a passive set with crossovers, see the Audison Thesis TH K2 II P Coro. Optional THG 1.5 II and THG 6.5 II steel mesh grilles are available separately.

Key specifications

• Configuration: 2-way active kit — TH 1.5 II Violino tweeter + TH 6.5 II Sax woofer
• Woofer: 165mm, TPX cone, 50mm voice coil
• Tweeter: 38mm natural silk dome
• Power handling: 150W RMS / 300W peak
• Impedance: 4 ohm
• Sensitivity: 87dB
• Frequency response: 40Hz–26kHz

TH K2 II A Coro: 2-way 4 ohm kit, 300W peak power, TH 1.5 II Violino + TH 6.5 II Sax

Thesis

The Audison Thesis range was developed with the goal of achieving complete acoustic transparency, drawing on principles inherited from the HV Venti. Using finite element simulation software (FEM) developed by the Audison R&D team, a mathematical model was created and refined through extensive prototyping to produce the ideal transducer.

The TH K2 II A Coro is designed to reproduce the musical signal from Thesis electronics with complete fidelity. The TH 1.5 II and TH 6.5 II together offer a wide crossover point range: the tweeter covers 800Hz–22kHz and the woofer responds cleanly up to 4kHz, giving two factory-recommended cut-off options and flexibility for user adjustment.

TH 1.5 II Violino

• 34mm CCAW single-layer voice coil — lightweight, stable at lower frequencies, with no musical transient compression.
• Custom N38 "H-grade" neodymium magnet delivering 1.67 T*m in the magnetic gap for strong dynamic response and low distortion across the full frequency range.
• Exclusive air-loading system achieves a resonance frequency below 800Hz, allowing filter set-up from as low as 1.5kHz – 12dB/Oct.
• 38mm natural silk dome, optimised using material characterisation, laser vibrometer scanning, and finite element analysis for a smooth, extended response.
• Frequency response up to 26kHz, optimised for off-axis installation.
• TH 1.5 II Violino Tuning System offers two electro-acoustic load options — bottom case or bottom disk — for maximum performance or flexible in-car integration.
• Full solid metal construction, with every part exclusively designed and produced for the TH 1.5 II.
• FEM-optimised faceplate and front spokes for improved dispersion pattern.

TH 6.5 II Sax

• 50mm CCAR (Copper Clad Aluminium Ribbon) mobile voice coil wound with flat wire to maximise force factor and heat dissipation.
• Low voice coil inductance to optimise mid-high band emission (2–3kHz).
• N48 "H-grade" neodymium magnet with high thermal stability for consistent dynamic reserve.
• Magnetic group geometry designed using FEM simulation to concentrate the magnetic field in the gap and maximise efficiency.
• TPX® transparent membrane reduces frequency response irregularities in the mid-high band and leaves the speaker interior visible.
• Membrane geometry designed using simulation software for smooth, wide-angle emission.
• Single-piece die-cast aluminium basket with four pairs of spokes to optimise heat transfer, eliminate turbulent airflow, and ensure structural rigidity.
• Hi-excursion suspension and spider, optimised through multi-physical loudspeaker behaviour simulations.