These speakers were purchased and installed by professionals. It was the crossovers that were bad. So I had to replace and get a different crossover as it was a set and to keep the whole infinity it was annoying that it was brand new and we found we needed a new part even though this set is brand new and was complete. Not as much . Once you use a different crossover, the speakers sound amazing in a 2005 Mercedes C240. I had to add an amplifier to the system. I used a 1500 watt amp.
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