Very clean crisp sounding, not over powering def need to have a sub with these.

They sound great combined with an Alpine CDE-134 HD

I bought these alpines to replace some cheap polks in my wrangler. Wow, what a difference. These speakers scream without distortion. I am very very satisfied with this purchase.

I love these speakers! Running them off of a Sony 52x4 head unit. Installed in a wrangler. These speakers scream. Base is good. Highs are amazing. Originally installed some cheap Polk audio speakers on the roll bar and they were terrible. The alpines sound 100 times better! I was concerned that I would have to amp the new speakers but there is no reason to do so...

To start, these have nearly no bass. However the mid and highs are reproduced with amazing clarity with no distortion even at high volumes. I was particularly impressed with the high end where I find most speakers have a distorted sound. Not these, the highs all the way up to the highest frequencies are very clear. They are so clear that you can easily hear how bad SiriusXM actually sounds and hear the difference between low and higher bit rate encoded MP3s. But when you put in a 256kbps MP3 or a CD, these speakers shine and show off the clear reproduction of music.

I got these for the front doors because they were the largest coaxial that would fit without going with component. In retrospect I would have gone with the Alpine SPR-60C (potentially the SPS-610C would also be an improvement) and dealt with the component tweeters to match the Alpine SPR-60 (that has decent bass) that I installed in the back. In fact, I may end up upgrading to when I can afford it and include the Alpine KTP-445U "Power Pack" amp.

Also I am running off the Alpine head unit power, no Amp. These sound better at high volume so clearly the amount of power is a factor. I assume with even a modest amp these would sound that much better.

So they sound awesome, but go with 6-3/4" if you can, and the SPR-60 if you can afford it.

Very clear

The speakers lack clear highs and have essentially no bass. I have high end amp and head unit and the stock paper speakers were superior. I uninstalled the alpines and am returning them. I reinstalled the stock speakers and the improvement in sound was not subtle.

I installed these speakers in my 1998 Chevy Silverado Extended Cab to go with the Alpine CDE-124SXM deck and Alpine KTP-445 powerpack. The difference in sound between the stock speakers and the SPS-510s is like night and day. The highs are crisp and clear and the bass is deep enough for my liking. I can't say that the installation was easy, but it was not rocket science. The door panel removal tools are a definite need for this job. The instructions were clear and concise, but it would be really nice if the Crutchfield team put together a YouTube video.

My 98 Wrangler had stock audio throughout until I swapped the stock speakers for these Alpines. Of course, I was skeptical because the Jeep has the acoustic quality of a cereal box in a wind tunnel. (how much difference could there really be?)... A world of difference! I matched the speakers with a 133bt head unit .... Again skeptical..... But again pleasantly surprised. No dropped calls and real clarity in hearing the spoken word and in the reproduction of each possible modality....iPod, pandora over my Android, and CDs too.

Installed them into my 03 Subaru WRX. Install was a breeze and they sound nice! Yes these aren't the biggest speakers I could put in, but my wallet is also not the biggest. Pretty good back for you buck. Crutchfield included spacers and speaker adapters to work with my stock speaker plugs so that was good. Problem was that I knew for a fact that the speaker spacers wouldnt work too well. Instead I picked up a front/rear speaker spacer combo from IA Performance. This allowed me to instal the 5 1/4 speakers into a 4inch space AND they gave me necessary clips/plugs to securely remount my door panels to accommodate bigger speakers. Same with the front, thicker spacer from IA performance allowed door card to mount properly and have proper clearance. The other upgrades left for my audio is to get a subwoofer(s)/enclosure/amp.

was simple to replace stock speakers with the speaker brackets and speaker adapter harness that came included and have excellent sound coming from speakers

I am running these off my stock system in my 2004 cadillac cts and wow what a difference it made!. The only thing that i found a little funny was that the basket for the speakers is plastic and not metal like ones ive used in that past, but it does make them really light so thats nice too. And as always Crutchfield gets A+ for there great customer support.

I bought these as the first part to my multi-part soundsystem upgrade in my 2007 Subaru Impreza. The stock system is junk. I put these in with ease and there was an instant and very noticeable upgrade in quality. I am next going to replace the rear speakers and replace the headunit. Even with just these, it's made my long commute more bearable because the quality is so much better!

I expected the speakers to be great, which they are. The help on the installation is what really impressed me. I was unsure about how to remove the interior panels on my Corvette before installing the Alpine SPS-510 speakers. I called the "800" number and the service tech emailed me the instructions immediately. I proceeded to do the installation, which came out great. Lou V.

Speakers sound great. The fit nice and were eay to install. The only problem
is the speakers don't come with grills. Major problem if they are going to be
installed in an area where they might get damages. The only
catch.....Crutchfield does not sell the grill. You have to go online and buy from
somebody else.