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The Audikom EX25Q‑4 is a exciter speaker designed to directly transform rigid surface into acoustic emitter, leveraging 25 mm voice coil and 20 W RMS admissible power to generate structured sound restitution despite absence of traditional diaphragm. Four-arm transmission architecture extends contact zone with support, enabling more homogeneous diffusion while favouring extended response toward spectrum lower end according to mechanical properties of surface used.
Intended for discrete integrations, furniture, panels, glass or composite structures, it combines 4 Ω impedance and high-field neodymium motor, enabling maintenance of good sensitivity level while remaining exploitable with compact amplifiers. This approach extends into its pre-applied 3M VHB adhesive fastening system, ensuring efficient mechanical coupling with support, guaranteeing optimal energy transfer, while spring terminals facilitate rapid integration in embedded systems or invisible audio installations.

Technical characteristics
| Specifications | |
|---|---|
| Product type | Tactile exciter |
| RMS power | 20W |
| Impedance | 4Ω |
| Voice coil diameter | 25mm |
| General | |
|---|---|
| Resonance frequency (fS) | 224 Hz |
| DC resistance (RE) | 4.3Ω |
| Voice coil inductance (LE) | 0.25mH @1kHz |
| Total quality factor (QTS) | 0.69 |
| Additional diaphragm mass due to air load (MMS) | 1.75g |
| Force factor (B·l) | 3.86 Tm |
| Mechanical suspension compliance (CMS) | 0.0003 mm/N |
| General | |
|---|---|
| Dimensions | Ø101.44 x 24.7mm |
| Package | Sold individually |
| Speaker Power (W RMS) | 20.0 |
| Speaker Type | Exciter |
| Impedance (Ω) | 4 |
| Loudspeaker diameter (mm) | N/A |
| Diaphragm type | N/A |
| Efficiency / Sensitivity (dB) | N/A |
| Max Linear Excursion (Xmax) (mm) | N/A |
| Lowest frequency (Hz) | N/A |
| Highest frequency (Hz) | N/A |