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Positive Grid reveals Spark Pearl, a limited white-tolex edition of the Spark amplifier | Guitar.com | All Things Guitar
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Positive Grid Spark Guitar Amplifier, Electric, Bass and Acoustic Guitar Combo Amp (Spark) - GUITARMACIST.COM
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Easily Learn and Jam with Spark, the Smart Amp and App that Features Intelligent Technology - Bass Magazine - The Future of Bass
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Positive Grid Unveils Spark Smart Guitar Amplifier and App Featuring Intelligent Technology and Voice Control | audioXpress
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