Portable Ultrasonic Power Amplifier
part # 70101, 70103
Power amplifier for ultrasound playback through third-party D/A converter products such as National Instruments DAQ devices or USB audio interfaces (suited for setups that require custom software for controlling the playback procedure). The amplifier can be powered either from a computer via USB (5 VDC) or from a separate AC/DC adapter (12…36 VDC).
Power Amplifier, front view
Power Amplifier, back view
| Number of channels | 1 |
| Output power | 1.5 W (USB powered) or 10 W (with external 36 VDC power supply) |
| DC bias voltage for electrostatic speakers | 200 V (not available in Model B, # 70103) |
| Frequency range | 1 … 180 kHz |
| Slew rate | 8 V/µsec |
| Overload indicator (red LED) | yes |
| Volume adjustment potentiometer | yes |
| Speaker output connector | 4-pole speakON connector |
| Physical power connectors | B-type USB socket (5VDC) or 2.1 mm coaxial power socket (12…36VDC) |
| Supply current | max 500 mA (drawn from USB) or up to 1 A from an external 12…36 VDC supply |
| Housing | compact aluminium enclosure |
| Physical dimensions (W/H/D) | 85 x 35 x 190 mm |
| Weight | 330 g |
Functional principle of the Portable Ultrasonic Power Amplifier