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<blockquote data-quote="Gordie" data-source="post: 8727284" data-attributes="member: 672651">Hello all,&nbsp;I have a pickup truck with a Pioneer DEH-80PRS with an Alpine amp (not sure of specs, 4 channel?) and recently upgraded to Focal speakers in the front, and have nothing fancy for speakers in the back since it&#039;s a pickup truck, and I have a small subwoofer.&nbsp;My question is that after I got my Focal speakers, the sound was very &#039;bright&#039;. I asked if the install shop could adjust this and I had to bring it back because apparently they needed to make adjustments to the amp?&nbsp; This is where I get confused as a novice as I&#039;m not certain why, or what they did to make the adjustment?&nbsp; I got my truck back and still the highest of the high notes are &quot;sissing&quot;? Is that the correct term?&nbsp; Does that make sense?&nbsp; What kind of adjustment has to be made to correct this?&nbsp; Is there nothing on the Pioneer deck that I can adjust myself??Thanks for any advice/suggestions!</blockquote>

[QUOTE="Gordie, post: 8727284, member: 672651"] Hello all, I have a pickup truck with a Pioneer DEH-80PRS with an Alpine amp (not sure of specs, 4 channel?) and recently upgraded to Focal speakers in the front, and have nothing fancy for speakers in the back since it's a pickup truck, and I have a small subwoofer. My question is that after I got my Focal speakers, the sound was very 'bright'. I asked if the install shop could adjust this and I had to bring it back because apparently they needed to make adjustments to the amp? This is where I get confused as a novice as I'm not certain why, or what they did to make the adjustment? I got my truck back and still the highest of the high notes are "sissing"? Is that the correct term? Does that make sense? What kind of adjustment has to be made to correct this? Is there nothing on the Pioneer deck that I can adjust myself?? Thanks for any advice/suggestions! [/QUOTE]

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