for children 5-110 lbs. / 0 to 99999 Months

Symphony DLX All-in-One Car Seat (Apex)


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Extended use from birth to booster

The Evenflo® Symphony™All-In-One Car Seat accommodates children ranging from 5-110 lbs. with the most innovation and value on the market. Symphony provides exclusive safety features like Quick Connector® technology; you simply Click, Click, Pull for a super-fast and super-snug installation! And with Infinite Slide™ Harness easily slides for an accurate fit every time. No reworking the harness as child grows! So parents can be sure children are properly secured every time.

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Trusted by Millions of Families for Nearly a Century

Made in USA with US & Global Components


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Peace of Mind:

Expiration: 8 years

Warranty: 90 days

Returns: 30 days


Installation Manuals: Browse »

FREE Video Support: Book Now »

Why You’ll Love it

Comfort, safety, and extended use, together in perfect harmony...

Rated a #1 Car Seat by a leading consumer magazine, the Symphony is an opus of car seat innovation. Evenflo pioneered the all-in-one car seat, which unlike typical convertibles, accommodates children from birth up to 110 lbs. Symphony car seats can be used rear-facing, forward-facing and as a belt-positioning booster, covering a wide spectrum of seating options. The Symphony embodies our passion to provide families with safer, more peaceful rides and are proudly made in the United States of America.

Product Details

Child Specs (5-110lbs)


  • Weight: 5 - 40 lbs. (2.3 - 18 kg.)
  • Height: 19 - 40 in. (48 - 102 cm.)
  • Fit: Top of child’s head is at least 1 in. below the top of the child restraint seat back.


  • Weight: 22 - 65 lbs. (10 - 29.4 kg.)
  • Height: 28 - 50 in. (71 - 127 cm.)
  • Age: At least two years of age.
  • Fit: The tops of child's ears are below the top of the child restraint headrest.


  • Weight: 40 - 110 lbs. (18 - 49.8 kg.)
  • Height: 44 - 57 in. (112 - 145 cm.)
  • Age: At least four years of age
  • Fit: The tops of their ears are below the top of the child restraint.

Product & Shipping Specs

  • Dimensions: 19.5" High x 21.5" Wide x 28" Long
  • Product Weight: 20
  • Package Width: 20.875
  • Package Weight: 25
  • Package Depth: 20.875
  • Package Height: 27.625


Safety Testing

At Evenflo, we continue to go above and beyond government testing standards for car seats.

  • Side Impact Tested:Meets Evenflo’s proprietary side impact standards.
  • Designed and tested for structural integrity at energy levels approximately 2X the federal crash test standard.
  • FMVSS 213: Federal Motor Vehicle Safety Standards for Child Restraint Systems
  • FMVSS 302: Federal Motor Vehicle Safety Standards for Flammability of Interior Materials
  • CMVSS 302: Canada Motor Vehicle Safety Standard
  • CMVSS 213: Canada Motor Vehicle Safety Standard
  • Certified For Use In Aircraft: When used with the internal 5-point harness this restraint meets FAA Inversion requirements for airplane use.
  • Evenflo Temperature Testing: All current Evenflo car seats are tested for product integrity at both high and low temperatures.

Use & Care

Use & Care

Read all instructions and warnings on the product, product labels, and instruction manuals before use. Consult your vehicle owner’s manual to determine proper placement of child restraint in your vehicle and familiarize yourself with your vehicle’s components.

Browse Instruction Manuals »

Cleaning Instructions
  • DO NOT lubricate or immerse in water any part of this child restraint, unless rinsing is permitted
  • Plastic and metal parts may be wiped clean with mild soap and water and dried with a soft cloth. Do not use abrasive cleaners or solvents.
  • Take care not to damage any labels.
  • The harness can be wiped clean with mild soap and water. Allow harness to air dry.
  • Machine wash the seat pad separately in cold water, delicate cycle. Tumble dry 10 to 15 minutes on low heat.
  • Periodically inspect and clean the restraint's crotch buckle of food, liquids, and other debris to ensure proper latching. Place the buckle in a cup of warm water and gently agitate the buckle back and forth. Press the red button several times while the buckle is in the water. Do not submerge the harness strap. To avoid damage to the buckle, do not clean the buckle with soap or detergents and do not use a lubricant.

Evenflo Symphony™ DLX All-In-One Car Seat

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SYMPHONY DLX APEX is rated 4.6 out of 5 by 311.
Rated 5 out of 5 by from My Favorite Car Seat!! My family owns 6 different brands and styles of car seats. They range from an inexpensive, well-known brand to a top-of-the-line all-in-one. This Evenflo Symphony Elite in Porter is hands-down my absolute favorite car seat! And it’s all-in-one! We purchased two of this exact car seat for an extremely good price on sale. One is for our 3rd car or as back up or for grandma, and one is for our daily babysitter. There is more padding than any of the other cat seats we have; my 10 month old looks like she’s lounging in a comfortable recliner! The latch hooks/buttons make this car seat the easiest one to install with latch out of those we own. There is no shifting and moving and pushing to try to get the latch to click - it just hooks right in. The release button is not hard to push either. If you are looking for a luxury car seat for your little one without the luxury price tag, look no further! I 100% recommend this Symphony Elite convertible!
Date published: 2020-02-26
Rated 5 out of 5 by from Wonderful Car Seat Overall! I bought this for a friends baby shower and she absolutely cannot stop raving about how amazing it is! It's versatile, lightweight and very easy to install. Baby fits super comfortably which brings comfort to mom as well. The head padding is a wonderful accessory also. It's perfect for all ages of small human which eliminates the need for additional car seats. Great buy!
Date published: 2020-02-14
Rated 5 out of 5 by from Amazing quality car seat! I have no complaints about this car seat. It grows with your child through all stages of baby and toddlerhood. I am able to keep my almost 2 year old rear facing longer since purchasing this seat. The material wipes clean easily, and removes much easier than our previous car seats for washing. I most definitely recommend this seat if you are looking for quality and durability.
Date published: 2020-01-27
Rated 5 out of 5 by from We use this car seat for my oldest and we love it! It is so easy to install. We have used it for a few years now both rear and now forward facing and it has grown nicely with my oldest. We love that it has two cup holders as well.
Date published: 2020-01-18
Rated 4 out of 5 by from Great car seat but two small gripes I wanted to wait until my son was almost 5 to write an honest review about this products after years of use. I love this car seat. My son sweats alot so I was looking for something that had the material needed to keep him cool and help regulate his body heat. This was does it feel very comfortable and helped alot with keeping him cool especially when he did the head lean to the side thing. Very soft so I didn't have to sorry at all. Seat is made to be very adjustable according to growth. Rear facing and front facing and booster seat enabling which is a huggggeee plus. Now for my two gripes...1. Rear facing wasn't an issue but when time came to front face I found installation to be a bit challenging. I found a YouTube video and followed the instructions to the letter and still found it to be a bit loose than I wanted. What I did was have my girlfriend sit in the seat because she is only 110 lbs and use her as a counterweight to tighten the seat. It felt more secure that way and also there is a 3rd strap on the back of the car seat that also gets clamped to the back of your car/SUV as well. 2. Removing it to clean it is not too difficult but can be challenging for someone who isn't accustomed to doing it. It can be removed along with the headrest area and I wash it in cold water and I use dreft to avoid scents and I let it tumble dry on permanent press so as to not ruin the material and it is as good as new considering all the food he drops on it. Just putting it back you have to be careful not to forget to put back certain straps in certain areas which I did the first time. Otherwise you will have to remove rinse and repeat ....all in all I love this thing and if you can bypass these 2 issues this seat IS DEFINITELY it. The 2 gripes are the only reason it didn't get 5 but would still recommend
Date published: 2020-01-16
Rated 5 out of 5 by from I love this seat so much. Best seat we've ever used. The ease of the install is amazing, great for the parent on the go, especially one who is 5'1" and with no upper body strength who just can't install the other seats. This one is so easy. And my son loves it, it's so comfortable for him. And it buckles nice and easy. 10/10
Date published: 2020-01-10
Rated 5 out of 5 by from Very comfortable, dislike head rest I love this car seat so much, we had to get one for our daughter after trying this out for our son. We got the black and red one with a different infant insert though. This one I feel has a poorly designed infant insert, (it is easily removable, which is what we did) it has a bottom piece and a head piece rather than being one long insert, so the middle part where their back goes has no extra padding like their butt and head do, making their head tilt forward too far no matter how far back you tilt the car seat. We actually turned the head rest upside down so that the longer ends are facing up, and we put it behind her back, evening out her posture as if she was using a normal insert that is one piece...other than that, it is very comfortable and very well padded, we love it and wouldn’t go with anything else.
Date published: 2019-12-31
Rated 4 out of 5 by from This carseat has been working pretty well for us. I do have to say it's very bulky so might not work for smaller cars.
Date published: 2019-12-11
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