Nimbus has several advantages over Positive Grid’s Spark 2:
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Power: Nimbus outputs 70W stereo vs. Spark 2’s 50W mono — about 40% more wattage.
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Speakers: Nimbus uses Powerbass S-4002 drivers with tweeters for a wider frequency range.
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Processing: Nimbus has roughly 5x Spark’s DSP power for smoother performance.
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Flexibility: Effects can be reordered or duplicated — Spark 2 has a fixed chain.
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Inputs: Nimbus offers 2 x combo XLR / quarter-inch inputs versus Spark 2's single quarter-inch input.
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MIDI Support: Nimbus works with any MIDI controller; Spark 2 is limited.
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Openness: Nimbus supports third-party and user-contributed plugins; Spark is closed.
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Price: Nimbus offers competitive pricing, especially for early backers.
Overall, Nimbus delivers more power, flexibility, and openness at a similar size.