The World’s First TRUE MEMS Microspeaker for:




Replacement of Voice Coil Technology


Full Bandwidth Speaker replaces single dynamic driver systems

Unsealed or Multi-Driver

Tweeter replaces 1 or more balanced armatures


Montara, the industry’s first TRUE MEMS speaker, eclipses early hybrid-MEMS speakers by implementing the entire speaker (actuator and membrane) in silicon, reducing package height and eliminating driver matching and calibration due to inherent variability in traditional membrane assembly.

Through the combination of design innovation and monolithic capacitive piezo-MEMS manufacturing, Montara delivers a new level of performance, size, energy efficiency and uniformity not possible with traditional voice coil or hybrid MEMS approaches.

Sound Quality
  • Full bandwidth (20Hz-20kHz) with flat frequency response at 115dB SPL (sealed)
  • 0.5% THD (300Hz @ 94dB SPL)
  • Better SPL/mm3
  • Highly uniform and reliable semiconductor process
  • Eliminates driver matching and calibration
Low Latency
  • <50µs group delay (mechanical latency) enables improved ANC of non-stationary noise
  • Near-zero phase delay increases maximum noise suppression of stationary noise
  • Monolithic piezoMEMS 10,000g mechanical shock resistance
Longer listen times
  • Montara’s capacitive vs. current-driven architecture reduces driver power consumption
  • IP58 water immersion and dust resistance without special membrane
  • World’s First SMT-ready microspeaker
  • Replace multiple balance armature drivers with a single chip
Small size
  • 50mm3
  • <1mm thickness


 Montara XSM-2300
Montara (Standard)
Montara XSM-2300
Montara (Side-Firing)
Resonant Frequency (fres @ 30Vpp)>20kHz>20kHz
Acoustic Performance (IEC 60318-4 Coupler)
SPL @ 20Hz / 30Vpp115dB115dB
SPL @ 250Hz / 30Vpp115dB115dB
SPL @ 1kHz / 30Vpp115dB115dB
SPL @ 5kHz / 30Vpp115dB115dB
THD @ 300Hz/94dB SPL0.5%0.5%
Group Delay (100Hz-2.6kHz)<50µs (15µs mean)<50µs (15µs mean)
Phase Delay (60Hz-2.6kHz)2°±1°2°±1°
Energy Consumption w/white noise @ 94dBMontara: 26µW
Montara+AMP: 11.52mW
Montara: 26µW
Montara+AMP: 11.52mW
Energy Consumption w/pink noise @ 94dBMontara: 26µW
Montara+AMP: 11.7mW
Montara: 26µW
Montara+AMP: 11.7mW
Package Dimensions5-lead LGA, metal cap (6.05x8.4x0.985mm)5-lead LGA, metal cap (6.1mm ɸ (diameter), 6.05(W)x1.0(H)x8.4(L)mm)

All specifications are preliminary and subject to change.