Alpine MRV-1507

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I replaced the outputs in the right channel all 8 of them4x IRF540N4x IRF9540I also replaced Q427,428 KTA1220A'S in the right channel..When i power the amp up it idles fine ..On the right channel i get 3.98 volts measured directly across speaker terminals..On the Left channel i get 1.30 volts measured directly across speaker terminals..Are the pots VR401 and VRr402 for the DC offset or does anyone have any ideas on why i have DC voltage across the speaker terminals?
 
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