Unika PRO-STP Speaker Tester Debuts

Unika PRO-STP Speaker Tester.Waldlaubersheim, Germany (April 3, 2025)—It may look like a DI but Unika Pro has introduced the PRO-STP Speaker Tester with an onboard pink noise generator.

Inside the unit’s compact stand-alone enclosure, the pink noise generator is fitted with a rotary level control, a dedicated XLR output for sending Pink Noise to a mixer or powered speaker, and separate NL4 and NL8 sockets to test impedance and phase of passive speaker drivers directly.

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The individual pins on the NL4 and NL8 connectors are accessed by a bank of four toggle switches; a momentary Impedance Test push-button sends a 5VDC signal to the selected NL4 or NL8 pins to illuminate green, yellow or red LEDs indicating impedance measurements in the ranges 4, 8 or 16 ohms.  The 5VDC button can also be used to aid visual inspection of speaker cone polarity and identifying polarity errors.

The unit requires 4 x 1.5V AA batteries or a third-party 6V external PSU, which is not supplied.

Taiwanese manufacturer Unika was originally founded in 1985 as an OEM manufacturer, but created its own Asia-based brand in 2016, and in the EMEA through Mega Audio in 2018. As such, the PRO-STP Speaker Tester was originally designed as a custom-made unit for an Asian customer, but will now be available through Mega Audio in Waldlaubersheim, Germany.