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<blockquote data-quote="XORstatus" data-source="post: 7475675" data-attributes="member: 635541">I think I know whats going on but I wanted to run it by all of you EXPERTS to validate my conclusions.I recently Installed new speakers in my car, I have a volvo s60, I use a stock HU because I like the look of an all stock car.However I recently installed after market speakers, 4 to be exact.&nbsp; The two rear speakers are alpine co-axle speakers capable of 40 watts rms per. The two front speakers are alpine 610C&#039;s which are component speakers.The speakers that I removed were stock volvo speakers and their impedance is 6 ohms,&nbsp; the new alpine installs are all 4 ohms, im pretty sure.The problem is at moderately high volumes, NOT loud but not quiet either the speakers begin to crack and the audio they produce becomes distorted.The HU is rated @ 40 w per channel I&#039;m assuming @ 6 ohm b/c the speakers that I removed were.&nbsp; &nbsp; &nbsp; The alpine 610C&#039;s are rated 80 rms,&nbsp; DUE TO THIS fact I dont believe the speakers are being over driven.Two assumptions:1) The difference of impedance is causing the HU amp to distort at low volumes .2) The alpine crossover is not installed, I didn&#039;t install the crossover because I didn&#039;t think there was a need to. The stock volvo system hand a 6.5 and a 1 inch tweeter in the door, It was my assumption that the power and signal is interpreted and delegated appropriately form the HU. However I could be very wrong.Do you guts agree that one of these issues may be the culprit?</blockquote>

[QUOTE="XORstatus, post: 7475675, member: 635541"] I think I know whats going on but I wanted to run it by all of you EXPERTS to validate my conclusions. I recently Installed new speakers in my car, I have a volvo s60, I use a stock HU because I like the look of an all stock car. However I recently installed after market speakers, 4 to be exact. The two rear speakers are alpine co-axle speakers capable of 40 watts rms per. The two front speakers are alpine 610C's which are component speakers. The speakers that I removed were stock volvo speakers and their impedance is 6 ohms, the new alpine installs are all 4 ohms, im pretty sure. The problem is at moderately high volumes, NOT loud but not quiet either the speakers begin to crack and the audio they produce becomes distorted. The HU is rated @ 40 w per channel I'm assuming @ 6 ohm b/c the speakers that I removed were. The alpine 610C's are rated 80 rms, DUE TO THIS fact I dont believe the speakers are being over driven. Two assumptions: 1) The difference of impedance is causing the HU amp to distort at low volumes . 2) The alpine crossover is not installed, I didn't install the crossover because I didn't think there was a need to. The stock volvo system hand a 6.5 and a 1 inch tweeter in the door, It was my assumption that the power and signal is interpreted and delegated appropriately form the HU. However I could be very wrong. Do you guts agree that one of these issues may be the culprit? [/QUOTE]

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