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Amazon.com: PYLE-PRO Premium Direct Injection Audio Box - Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass - 1/4 Inch Impedance Transformer Connector to Balanced & Unbalanced XLR-PDC22 ,
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Use of Direct Injection (DI) box - SAundCheck - a blog by Sudeep Audio for the Indian music industry
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