Ergo VT12 • Frequency band 18 Hz - 23 kHz

Ergo VT32 • Frequency band 20 Hz - 20 kHz

Ergo VT11 • Frequency band 18 Hz - 22 kHz

Ergo VT28 • Frequency band 20 Hz - 20 kHz

Ergo VT105 • Frequency band 20 Hz - 20 kHz