Audison Thesis TH K2 II P CORO Sax Violino 2 Way Passive Component Kit 150w RMS

The Audison Thesis TH K2 II P Coro is a 6.5-inch 2-way passive component speaker kit rated at 150W RMS (300W peak) at 4 ohms. It pairs the TH 1.5 II Violino 38mm silk dome tweeter with the TH 6.5 II Sax woofer and THX 2 II passive crossover, and sits at the top of Audison's Thesis range.

This is the passive version with the THX 2 II crossover. For the active version, see the Audison Thesis TH K2 II A Coro. Optional THG 1.5 II and THG 6.5 II steel mesh grilles are available separately.

Key specifications

• Configuration: 2-way passive kit — TH 1.5 II Violino tweeter + TH 6.5 II Sax woofer + THX 2 II crossover
• 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
• Tweeter level adjustment: -4, -2, 0, +1.5dB

Thesis

Thesis speakers were developed with the goal of being completely transparent — allowing only the musical signal to come through, with no colouration. Audison's R&D team used finite element simulation software (FEM) to build a mathematical model, then produced the ideal transducer through extensive prototyping.

The TH K2 II P Coro is designed to transfer the musical output of Thesis electronics with absolute fidelity. The wide frequency extension of the TH 1.5 II (800Hz–22kHz) and the smooth mid-high response of the TH 6.5 II (up to 4kHz) give the user a broad crossover point range. Audison has designed two cut-off options to take advantage of this.

TH 1.5 II Violino

• 34mm CCAW single-layer voice coil — lightweight, stable at lower frequencies, no musical transient compression.
• Custom N38 "H-grade" neodymium magnet producing 1.67 T*m in the magnetic gap for strong dynamic response and low distortion.
• Exclusive air-loading system gives 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 supports two electro-acoustic load types: bottom case or bottom disk, for best 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 voice coil in CCAR (Copper Clad Aluminium Ribbon) wound with flat wire to maximise force factor and heat dissipation.
• Low voice coil inductance to optimise output in the medium-high band (2–3kHz).
• N48 "H-grade" neodymium magnet with high thermal stability for consistent dynamic reserve.
• Magnetic geometry designed using FEM software to concentrate the magnetic field in the gap and maximise efficiency.
• TPX® transparent membrane reduces response irregularities in the mid-high band and leaves the speaker interior visible.
• Membrane geometry developed via simulation software for smooth off-axis emission.
• Die-cast aluminium single-piece basket with four pairs of spokes for heat transfer, turbulence reduction and structural rigidity.
• Hi-excursion suspension and spider, optimised through multi-physical loudspeaker behaviour simulations.

THX 2 II

• High-quality resistors, capacitors and inductors throughout — no compromises in construction.
• Compensation networks for both woofer and tweeter to optimise the load seen by the amplifier.
• Crossover filtering configured for a well-distributed vertical soundstage across the full height of the passenger compartment.
• Four tweeter emission levels (-4, -2, 0, +1.5dB) using the L-Pad technique.
• Mid-frequency level control (-3 to 0dB) centred at 900Hz.
• Bi-amplification option available.