Polk Audio MM521

Great sounding speaker

Overall this speaker has a nice warm sound that gets better and better. I have only had these for a week and they get better bass extension, although it isnt completely needed because I have a sub. I purchased these the 6.5 components, and the 6x9 polks as well they sound great together. I have a 12 inch kicker L7 solobaric and these speakers keep up the bass doesnt over power them.

Pros Great customer service and quick shipping clean sound, with crisp not overall bright highs perfect sounding.

Cons: none really they sound great

Polk MM521

I put these in my 2006 Harley Davidson Electra Glide Classic running the stock radio w/o an amp. They are a huge improvement over stock, and have amazing clarity and bass. They do get louder with use. I had to ziptie the crossovers to the fairing supports, which was no problem. I had to remove the little speaker covers, but the speakers look cool. I've washed the bike and they've been wet several times with no issues. I may try a small amp with them for more sound and clarity at speed! Highly recommend!

Polk Audio MM521 Speakers

I have used many brand marine stereo speakers and these are by far the best sounding speakers that I have used. Have installed about 300 stereos in golf carts and now this is the only speaker that I use.

MM521 = Great speakers.

I have these speakers in the fairing on my motorcycle. I have not heard better sounding 5-1/4" or smaller speakers. They play loud and clear, with great highs, and surprisingly good bass. They far surpass the stock speakers. Plus, they are waterproof.

Great Speakers!

I have to say I received great customer service. I ordered speakers for my 09 HD Street glide. They installed perfectly and sound great, so much better than the stock speakers. I would recommend these speakers to anyone.

Great sound and lightweight!

I purchased two pairs of these speakers and the sound is phenomenal. I bought them for a 2 seat roadster with a very loud cabin and they have done very well on only head unit power. As a plus, they're very lightweight but sturdy. I'd highly recommend them.

Polk is it

Awesome speakers for my topless Jeep, got rained on several times and NO problem.

pretty damm goof

Very tight sound, awsome looking speaker as well. Good bass level from such a small speaker.

MM521

This product is the standard everybody is trying to match. Great stuff

Polk Audio MM521

Works Great, I have had these installed for more than 6 months. Even though they have the correct size for a Plymouth Voyager, they are a little too tall. I got them mounted, but not recommended for this minivan...they sound spectacular though!