Hello,Thanks for shopping the Crutchfield web site. I'm Niles, and I'm glad to help. In answer to your question about adding new speakers to your 2009 Smart fortwo, I recommend the Pioneer Premier TS-A633P 6 ½" speakers for your application due to the fit, a fit in your budget, and a wider frequency response than the other two speakers you were considering. Please note that we unfortunately do not have a set of MasterSheet installation instructions created for your vehicle. However, if you have any questions after your purchase of a "new" product, you're entitled to call our toll free Product Support line for expert assistance. It's like having a professional installer on call. I have created your own online shopping cart with the gear we've discussed, where you can add, delete, or adjust the quantities as needed. You can also click on the items in your cart to find out more about them. When you're ready, you can complete your purchase by checking out at:http://www.crutchfield.com/I-rXYEc555/EmailCart.asp?emType=3&emKey=484890 You will need to remove the car door panels in order to access the speaker locations. To make this easier, I recommend using a door panel removal tool. I have added it to your online shopping cart. When you're ready to make your purchase, you can do so from our web site. Please enter my name, Niles, as your Advisor as you fill out our Complete Online Order Form. If you prefer, you can also call me, toll free, at the phone number below. Thanks for your e-mail. Please let me know whenever you need anything else. Crutchfield Advisor,A visitor to our site would like us to e-mail them an expert recommendation aboutCar Speakers - All Car Speakers. This person is interested in these Brands:No Brand Preference,And their price range is:$60 - $100Install# 10799 -- 2009 Smart fortwo Hatchback with 2 speakersFor speaker location: No Speaker Location Selected I plan to drive these speakers with:factory radio/audio systemI usually listen to my music:moderate-to-loudThe musical style that most closely resembles my musical preference is:Rock/Pop, Alternative, Jazz/Classical, Share with communityThe visitor added this personal message:rear mount inside door using factory front grills. looking at polk 651, pioneer TS-A633P and infinity 6022si. any others?
NilesCrutchfield Advisor1-800-388-2911-ext 3154