Summary: This low profile speaker has very good high and mid range performance and good bass. I got this for my girlfriend's 09 sentry front doors and she can hear clearer vocals and better all around sound compared to the 20w factory speakers. The sentra's mounting setup didn't require low profile speaker as the application chart said, but otherwise happy with the speakers.
Pros: Good sound and easy installation.
Cons: Had to trim a couple tabs off the speakers to fit the door adapter.
Summary: These speakers are very low profile and fit into the rear factory speaker locations in my 1981 Corvette. The sound is good, but not exceptional. Perfect solution if you don't want to modify to fit deeper speakers, which is the case with most aftermarked speakers. I tried Polk Audo's and they wouldn't fit. These are a great compromise. Highly recommend if you have space problems and want an upgrade over factory speakers.
Summary: Perfect fit and great sound for my 2010 Nissan Sentra. Were the only speakers shallow enough to fit my car's 2.5 in front door panel depth without compromising sound quality. They sound great with my pioneer avh 3500. I'm very happy with this purchase.
Pros: Depth size, outstanding sound quality, good price
Cons: Now I have to buy better speakers for the rear to match the sound quality of these!
Summary: I do like the sounds from them after they are installed inside an enclosure. Before installing under a dashboard they sound very tinny, metal-like. The installation under the d ash was very difficult because the mounting-holes in the speaker did NOT align correctly with the mounting bolts on the car. the speaker 'holes' were about 1/8 inch off from the bolts. I needed to redrill and expand the existing screw-holes in the speaker to match-up with the car bolts.
Pros: sound is so far, so good
Cons: the 4-corner mounting-holes on the speaker do not align with all 4 bolts under the dash. I needed to re-drill (expand) 3 of the 4 speaker-holes to align and mount the speaker.