Instruct: Classify Amazon reviews into positive or negative sentiment
Query: big improvement

I bought a pair to replace the stock speakers in a 2008 Ford Escape. The vehicle has the "audiophile" package, but the speakers always sounded bad. These are a huge improvement. They were somewhat easy to install: I couldn't get the inside door panel all the way off due to the locking mechanism, but even with the door panel still attached at that point, I was able to remove the old speakers and install the new ones. They fit right in---no adjustments needed. it was just a matter of splicing and crimping the old wire to the new speaker wire. My only regret is that I didn't get a pair for the back seat. They sound really good. The bass is deeper and the acoustics are better.well worth it.