I bought this is used but very good condition off of amazon. I give it 4 stars because when it worked it worked great. But it did give me 2 issues within 2 weeks. One it would go into protect at high volumes. And 2 shortly after installation channel 2 died and started producing volts that ultimately killed my speaker. I was a 12 volt installer for the last 2 years so it was not a novice install issue. I had 4 matching jbl speakers at 4 ohm running 75 watts A piece. Sound quality was crisp and clean. Would buy again but would have to be new. I think I just got a lemon.
