A variety of amplifiers are compatible with EEGer. Because of this, it can be difficult to determine which amplifier is the right choice for use with EEGer. Below is a short comparison of the most popular amplifiers available and how they compare to one another.

Neurobit Optima 2 & Optima+ 4

The Optima 2 is one of the newest amplifiers added to EEGer, and also the one recommended most highly by our support team. Despite its low price compared to other amplifiers, the Optima 2 is remarkably accurate and well-constructed. This amplifier is a great choice for Home-Use, as a backup or replacement, or for getting started with a clinical license.

The four-channel version, the Optima+ 4, includes the same features and quality of the Optima 2 with additional peripheral inputs for use with other biofeedback software.


  • Fast and accurate impedance readings.
  • Great build quality; feels sturdy and reliable.
  • Low price compared to other models of amplifier.


  • Requires EEGer4 440s or later.
  • Physical power button can be confusing to users familiar with plug-and-play devices, but still easy to get working.

Pocket Neurobics U-Wiz, Q-Wiz, and U-Wiz 4

The U-Wiz is a small, low-cost amplifier with great reliability. This amplifier is great for travel due to its small size and robust design, but availability can be limited depending on region.

There are two four-channel amplifiers by Pocket Neurobics that are compatible with EEGer, the Q-Wiz and U-Wiz 4. The U-Wiz 4 is identical to the two-channel version but features additional electrode inputs and some welcome design improvements. It is priced between the two-channel U-Wiz and the larger four-channel Q-Wiz, which features additional inputs for other biofeedback software.


  • Accurate and consistent signal response times.
  • Small size allows for more flexibility when traveling or in small spaces.


  • Provides impedance measurements on a per-channel rather than per-electrode basis.
  • Can have an ‘offset’ on impedance measurements, making them slightly different than what would be observed with other amplifiers.

Phoenix A202 & A404

The A202 has been used alongside EEGer for many years, making it the easiest amplifier to use and troubleshoot. While no longer in production, working preowned A202s and A200s can be a good choice.

The A404 is the four-channel variant of the A202 and features the same quality of the A202 in a slightly larger enclosure.


  • FDA-Cleared device.
  • Input-specific impedance measurements.
  • Easy to troubleshoot.


  • No longer under active production, meaning new models are not available.
  • Old revisions can have a higher-than-average failure rate, which can make purchasing preowned A202s challenging.

ThoughtTechnology ProComp2 & ProComp Infiniti

The ProComp2 is one of the original amplifiers compatible with EEGer. Using proprietary cables and connectors, this amplifier has a high-cost and can be difficult to configure and troubleshoot.

The four-channel version of the ProComp Infiniti, which includes additional input channels compared to the ProComp2.


  • Small size allows the amplifier to be easily clipped to the client, allowing for shorter electrodes.
  • Compatible with other forms of biofeedback when used with ThoughtTechnology’s software.
  • Sturdy storage case for the amplifier and its components.


  • High cost, including proprietary cables and connectors that can be as expensive as an entire amplifier.
  • Components can be fragile or easy to damage and due to the number of parts, lengthy troubleshooting can be needed to identify the problem.
  • Including the batteries and power switch, there are many possible points of failure compared to a plug-and-play device.
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