Audison Thesis TH 3.0 II Voce - 3-inch Midrange for precise mids
The Audison Thesis TH 3.0 II Voce is a 3-inch midrange speaker for demanding front sound systems, delivering clean and linear mid-range frequencies. A powerful N38H neodymium magnet, a 30.5 mm CCAR voice coil, and the lightweight TPX cone ensure high efficiency and low distortion. With an impedance of 4 Ohms, 55 W RMS, and a working range of 110 to 5,700 Hz, it is ideally suited for active 3-way setups.
Technical Highlights
- Size: 70 mm (3 inches)
- Power handling: 55 W RMS, 110 W peak
- Impedance: 4 Ohms
- Frequency response: 110 – 5,700 Hz
- Magnet: Special Neodymium N38H
- Voice coil: Ø 30.5 mm, CCAR (Copper Clad Aluminium Ribbon)
- Linear excursion (Xmax): 3.3 mm
- Qes: 0.52
Electro-acoustic data
- D: 66.75 mm
- Re: 3.4 Ohms
- Fs: 100 Hz
- Vas: 1.01 l
- Mms: 4.3 g
- Cms: 0.59 mm/N
- BL: 4.2 T•m
- Qms: 5.5
- Qts: 0.48
- Le (Standard): 0.18 mH
- SPL: 85.6 dB
Dimensions & Weight
- Outer diameter (A): 84 mm
- Mounting cut-out (B): 73.5 mm
- Mounting depth (C): 45 mm
- Magnet depth (D): 37 mm
- Total diameter including mounting (E): 89 mm
- Flange thickness (F): 18 mm
- Weight: 0.25 kg
Construction Features
- 30.5 mm mobile CCAR flat-wire voice coil for high force factor and efficient heat dissipation.
- Aluminum demodulation ring for linearity at high excursion; reduces intermodulation distortion and coloration.
- Motor geometry optimized by finite element simulation – concentrated magnetic field in the air gap for improved efficiency.
- Transparent TPX cone to smooth the frequency response.
- Cone geometry designed via simulation for homogeneous dispersion.
- Optimized cone/space resolution to linearize midrange reproduction.
- One-piece die-cast aluminum basket with four pairs of spokes – high rigidity with free airflow.
- Suspension and spider designed for high excursion; multiphysically simulated.
- eID technology for traceability of each TH 3.0 II.
Installation & Compatibility
With an outer diameter of 84 mm, a mounting cut-out of 73.5 mm, and a mounting depth of 45 mm, the TH 3.0 II Voce can be easily integrated into doors, A-pillar pods, or dashboard positions. It reliably performs as a dedicated midrange from 110 Hz and is ideally suited for active 3-way systems. Clean control with a 4-ohm load and approximately 55 W RMS per channel is recommended.
