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The XCITE XTB40 is a vibrating speaker designed for low-frequency reproduction, with an architecture that optimises bass extension down to 25Hz. It features an extended excursion of 5.0mm Xmax for 2.5mm of linear displacement, enabling it to generate significant mechanical energy whilst maintaining distortion control, whilst the combination of a dual N42 neodymium magnetic circuit and a 4-layer voice coil increases sensitivity and driving precision.
This approach is further enhanced by an aluminium construction—comprising the chassis and voice coil former—which improves heat dissipation and stabilises performance under high power, whilst the steel suspension with optimised geometry channels magnetic forces and minimises unwanted distortion. Together, these features deliver enhanced usable bass performance, particularly when paired with a high-frequency driver such as the XT25, to extend the overall response whilst maintaining consistency across the entire spectrum.

Technical specifications
| Specifications | |
|---|---|
| Product type | Exciter |
| Frequency response | 25Hz-1kHz |
| Impedance | 8Ω |
| Rated power | 80W |
| Nominal voice coil diameter | 40mm |
| Thiele & Small | |
|---|---|
| Voice coil inductance (Le) | 0.32mH |
| Second voice coil inductance (Le2) | 0.45mH |
| Voice coil resonant frequency (Fs) | 143Hz |
| Magnet resonance frequency (Fs) | 29.9Hz |
| DC resistance (Re) | 7.26Ω |
| Voice coil moving mass (Mms) | 13.3g |
| Magnet moving mass (Mms) | 304g |
| Maximum linear excursion (Xmax) | ±2.5mm |
| Mechanical strength of the voice coil suspension (Rms) | 0.42Kg/s |
| Mechanical strength of the magnet suspension (Rms) | 3.77Kg/s |
| Mechanical quality factor of the voice coil (Qms) | 5.22 |
| Mechanical quality factor of the magnet (Qms) | 15.1 |
| Electromagnetic quality factor of the voice coil (Qes) | 0.48 |
| Electromagnetic quality factor of the magnet (Qes) | 2.38 |
| Total quality factor of the voice coil (Qts) | 0.44 |
| Total quality factor of the magnet (Qts) | 2.06 |
| General | |
|---|---|
| Dimensions | Ø65 x 31mm |
| Weight | 319g |
| Package | Sold by unit |
| Speaker Power (W RMS) | 80.0 |
| Speaker Type | Exciter |
| Impedance (Ω) | 8 |
| Loudspeaker diameter (mm) | 46.0 |
| Diaphragm type | N/A |
| Efficiency / Sensitivity (dB) | N/A |
| Max Linear Excursion (Xmax) (mm) | 2.5 |
| Lowest frequency (Hz) | 25 |
| Highest frequency (Hz) | 1000 |