 Almost a great buy Strengths: Great rotary sound, lightweight, portable, rugged enclosure; good for live performance
Weaknesses: Excessive noise hum from low-rotor simulator output; not acceptable for studio recording
Summary: The Pro-3X has a great design and meets the need for a lightweight, portable, and great sounding rotary speaker. The enclosure appears to be rugged, and the controls are well thought out, although a MIDI control input would be a nice added touch. However, the first unit I purchased exhibited an excessive amount of hum from the low-rotor simulator output, and was deemed to be defective by the manufacturer. This unit was returned for a replacement unit, which also exhibited an excessive amount of hum from the low-rotor simulator output. Motion Sound states that the peak-peak noise level of the low-rotor simulator output should not exceed 200 microvolts, but the actual measured noise output was in excess of 8 millivolts peak-peak. This amount of noise is probably not a problem in a live performance situation, but is not acceptable for studio recording. After returning the second unit, I decided not to pursue this product any further until the manufacturer addresses this quality issue.
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