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LANZAR Parametric Equalizer Subwoofer - Gain Control & Bluetooth Wireless Audio Connectivity Blue Light Illumination, Version: 4.0, Range: Up to 32 ft Simple Pairing, Black (HTG50EBTH) - Walmart.com
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Pyle Parametric Equalizer with Subwoofer - 5 Volt RMS Pre-Amp Output W/ Subwoofer Gain Control - Walmart.com
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Massive Audio TRI-XO 3 Channel Active Crossover w/ Subwoofer Control & Gain NEW 623169650130 | eBay
Setting the Gain on Your New Amp | Did you just pick up your first subwoofer amp and not sure where to start with setting the gain? We have you covered! Check
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