Sonic Lens SL20 Bench Tests

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All tests of the Upstate Audio SL20/20-2 Sonic Lens run on our APx525 system garnered stellar results. Taking the top off of the unit reveals a power supply built for the long haul, providing enough headroom for the most demanding audio tasks and beyond. In fact, the power supply takes up nearly two-thirds of the SL20/20-2’s internal real estate and, according to designer Matt Lesko, is over-built using large components because of their reliability.

Interchannel crosstalk was subterranean at -126 dB.

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Frequency response through the unit was razor flat (less than 0.2 dB) to the limits of our test system between 10 Hz to 80 kHz (at 1kHz ref. level).

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Interchannel phase deviation was a miniscule 0.002 degrees

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Using a variety of gain and fine-tune adjustments, we were able to take the unit up to +25.5 dBu before the onboard overload light shined.

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The signal-to-noise ratio tested consistently left and right at +91.6 dB.