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They are both Maxxsonics so its pretty similar in build quality. I have a DSC1500.1 and love it, for a 'budget' amp. The ONX1.1500 comes with a remote bass knob also...."MB QR-2 Wired remote bass level control included" MB Quart ONX1.1500D - ONYX Class D Monoblock Car Amplifier/Amp
