LiveAmp series
LiveAmp: Compact wireless EEG amplifiers for mobile EEG applications
LiveAmp is a wearable, 24 bit amplifier (available with 8, 16, 32 and 64 channels). As it is wireless and allows you to store your recorded data internally (i.e. on an exchangeable memory card), there are no mobility limitations. It is easy and intuitive to use and its technical specifications leave nothing to be desired.
Wireless
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- Easily connects to any Windows® based recording computer
- Wireless transmission range: up to 10 m indoors and up to 30 m outdoors
- Recording time: up to 3.5 h with internal battery (extendable via power bank)
Ultra lightweight & compact
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- Weight incl. battery:Â 60 g (8 – 32 channel versions), 120 g (64 channel version)
- Dimensions: 83 x 51 x 14 mm (8 – 32 channel versions), 140 x 83 x 18 (64 channel version)
Outstanding signal quality
The amplifier’s recording characteristics are comparable to high-end laboratory EEG systems, e.g.
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- 24 bit A/D conversion
- Sampling rate: up to 1 kHz at a noise level of less than 2 µVpp with CMR higher than 80 dB (at 50/60 Hz)
Flexibility
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- Can either be used as a referential EEG amplifier or set up as a combined referential and bipolar EEG amplifier
- Comes with a built in 3-axis accelerometer
- Can be used in combination with easy to prepare active electrodes (actiCAP slim/snap) for best data quality as well as gel-based passive electrodes (LiveCap)
- Also compatible with passive sponge-based electrodes (R-Net) or active dry electrodes (actiCAP Xpress Twist) when quick preparation times are crucial
Expandability
If you would like to add physiological signals to your mobile EEG setup, you can expand the amplifier system with a dedicated Sensor and Trigger Extension (STE) that offers 8 trigger in and 8 trigger out ports as well as connection possibilities for up to 8 sensors.
Independence
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- Offers the possibility to store recorded data on the recording computer via wireless transmission, internally (i.e. on an exhangeable memory card) or on the recording computer via a micro memory card
- Data can be recorded for several hours without interruption, which gives you the potential to record high quality data virtually anywhere, and under any circumstances
LiveAmp 8 and LiveAmp 16
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- Great match for MoBI (Mobile Brain/Body Imaging) and BCI (Brain-Computer Interface) applications when only a small number of EEG channels is needed
- 8 channel version: Can record a total of 8 channels, referential and/or bipolar
- 16 channel version: Can record a total of 16 referential channels with a maximum of 8 bipolar channels or 8 referential and 8 bipolar channels
LiveAmp 32
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- Great match for MoBI (Mobile Brain/Body Imaging), BCI (Brain-Computer Interface), Sports, Sleep and Cognitive State applications
- Can record either 32 referential channels or 24 referential and 8 bipolar channels
LiveAmp 64
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- Great match for MoBI (Mobile Brain/Body Imaging), BCI (Brain-Computer Interface), Sports, Sleep and Cognitive State applications
- Can record either 64 referential channels or 56 referential and 8 bipolar channels
- Allows to re-use existing actiCAP slim active electrode sets and actiCAP snap caps (i.e. by adding two LiveAmp 32 amplifiers and a 64-channel LiveAmp adapter to your lab’s equipment)
- Provides the added benefit of having two fully functional 32 channel LiveAmp amplifiers
| LiveAmp | Technical specifications |
|---|---|
| EEG/ExG channels | |
| Number/type of channels | LiveAmp 8: LiveAmp 8 can record a total of 8 channels, referential and/or bipolar. LiveAmp 16: LiveAmp 16 can record a total of 16 referential channels with a maximum of 8 bipolar channels or 8 referential and 8 bipolar channels. LiveAmp 32: LiveAmp 32 can record either 32 referential channels or 24 referential and 8 bipolar channels. LiveAmp 64: LiveAmp 64 can recorder either 64 referential channels or 56 referential and 8 bipolar channels. |
| Measurement range | ±341.6 mV |
| Input noise | < 2 μVpp (0.01 Hz to 65 Hz at 250 Hz sampling rate) measured with internal battery and shorted inputs |
| Input impedance | > 200 MΩ (at DC) impedance of EEG/ExG channels to GND |
| Differential input impedance | > 400 MΩ (at DC) impedance between two EEG/ExG channels or bipolar EEG/ExG channels |
| Common-mode rejection (CMR) | > 80 dB (at 50/60 Hz) |
| Signal coupling | DC (there is no high pass filter in amplifier hardware) |
| Low pass filter in amplifier | Third order sinc filter with -3 dB frequency depending on the sample rate: - 1,000 Hz: 262 Hz - 500 Hz: 131 Hz - 250 Hz: 65 Hz |
| A/D conversion | 24 bit |
| Resolution | Approx. 40.7 nV / bit (= 2*341.6 mV / 224 bit) |
| Acceleration sensor | Built-in 3-axis acceleration sensor Three separate channels (x, y, z) Measurement range: ±2 g Resolution: 1 mg/bit, 12 bit Error: ±0.2 g (±10% of full scale) |
| Hardware sampling rates | Select between 250 Hz, 500 Hz and 1,000 Hz. Note: Maximum wireless bandwidth cannot always be guaranteed due to external interference |
| Sampling Rate = 1000 Hz | EEG/ExG channels: Up to 32 channels (this incl. AUX and acceleration) |
| Sampling Rate = 500 Hz | EEG/ExG channels: 32 channels or more (this incl. AUX and acceleration) |
| Data Storage | |
| Data storage | - On recording computer via wireless transmission - On micro memory card - On recording computer and on micro memory card |
| Card type | Micro SD® card, class 10 |
| Size of memory card | 32 GB |
| Maximum file size on memory card | 4 GB |
| Data format on internal memory card | Proprietary format; can be converted to generic Brain Products data format with converter software provided by Brain Products |
| Wireless transmission | |
| Wireless data transmission | In 2.402 - 2.480 GHz ISM band worldwide no restrictions for using this ISM range |
| Radio frequency output power | Max. 13 dBm (approx. 20 mW) |
| Wireless transmission range | Indoor: Up to 10 m (depending on environment) Outdoor: Up to 30 m |
| Electrodes | |
| Compatible electrodes | - Passive Ag/AgCl based electrodes - Active actiCAP electrodes |
| Impedance measurement | Available for passive and active electrodes and integrated in amplifier |
| Impedance measurement range | Up to 500 kOhm |
| Battery and power supply | |
| Power supply | Built-in rechargeable battery; Capacity: 1,000 mAh |
| Current consumption | Max. 250 mA |
| Charging time | Approx. 4 hours at 500 mA (for example, USB port of a computer) |
| Uninterrupted recording time with built-in battery (when fully charged) | - 3 hours (wireless data transfer only and passive electrodes) - 4.5 hours (storage on memory card only and passive electrodes) |
| Dimensions and weight | |
| LiveAmp 8, 16, 32: Dimensions (W x D x H) | 83 mm x 51 mm x 14 mm |
| LiveAmp 8, 16, 32: Weight | Approx. 60 g (incl. built-in battery) |
| LiveAmp 64: Dimensions (W x D x H) | 140 mm x 83 mm x 18 mm (incl. connectors: 25 mm) |
| LiveAmp 64: Weight | Approx. 120 g (incl. built-in battery) |
| Further data | |
| Built-in trigger/marker input | Yes, 3-pin 2.5 mm phone jack; TTL compatible; active low |
| LED indicators | Battery/status LED: green, yellow, red Wireless LED: blue |
| LiveAmp USB adapter | |
| USB communication | Data rate: 12 MBit/s USB 2.0 compatible |
| Input and output voltage | 5 V |
| Maximum power transfer | 5 W |
| Galvanic isolation | 2,500 VDC |
| Dimensions (W x D x H) | 40 mm x 30 mm x 20 mm |
| Weight | Approx. 30 g |
| Cable length | Approx. 50 cm, not detachable |
| System requirements | |
| Operating system | Windows® 7, 32 and 64 bit Windows® 8.1, 64 bit Windows® 10 |
| USB port | USB 2.0 or higher |
| LiveAmp Firmware | LiveAmp 64: Both LiveAmps should be running firmware version 4.60 or later. |
| Software requirements | LiveAmp 8 and 16: BrainVision Recorder version 1.21.0201 or later LiveAmp 32: BrainVision Recorder version 1.21.0001 or later LiveAmp 64: BrainVision Recorder version 1.21.0303 or later |
| Miscellaneous | |
| Suitable for use in MR scanner room | No |
| Medical device | No |
| CE marking | Brain Products GmbH confirms the compatibility of this product according to the Directive 2014/53/EU (RED) of the European Parliament and the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment. The Brain Products GmbH confirms the RoHS compliance of this product according to the Directive 2011/65/EU of the European Parliament and the Council of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (recast published in the Official Journal of the European Union on 1 July 2011) as well as all its amendments up to and including the Commission delegated directive (EU) 2015/863 of 31 March 2015 (published in the 0fficial Journal of the European Union on 4 June 2015). |
| FCC compliance (USA) | Yes |
| IC compliance (Canada) | Yes |
| MIC compliance (Japan) | Yes |
Getting started
Quick introduction to LiveAmp
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Tutorial video on actiCAP slim/snap with LiveAmp
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