Spectra S1 & Spectra S2 | Review, Set Up, and Settings!

The Spectra S1 and S2 have been staples in the breast pump world for years now. Anytime I look at a “best breast pump” list, there they are—usually right at the top. But it’s 2025, and we’ve got a lot of pumps on the market now. So, let’s dive in: Does the Spectra still hold up? I’ll walk you through the pros and cons, some unique features, and whether I’d still recommend it. Spoiler: It’s a solid pump that’s earned its reputation.

(This post was originally a video. Check it out, here!)

What’s the Difference Between the Spectra S1 and S2?

Let’s start with the basics. The Spectra S1 and S2 are identical except for two things:

  1. Color: The S1 is blue, and the S2 is pink.
  2. Battery: The S1 has a built-in rechargeable battery, while the S2 needs to be plugged in.

That’s it. Functionally, they’re the same pump. If you don’t think you’ll need a portable option, the S2 is typically a little cheaper. But honestly, I recommend the S1 with the battery feature—it’s just so much more convenient. You’d be surprised how often you’ll want to pick up your pump and go.

Suction Power and Efficiency

Okay, let’s talk suction because it’s a huge factor in any breast pump. I’ve tested a ton of pumps over the years (I think I’ve got around 100 in my closet right now), and the Spectra is still one of the most consistent performers.

  • Suction Strength: Single pumping can go as high as 300 mmHg, and double pumping sits around 220 mmHg. That little dip is totally normal when you pump both sides at once and still gives you plenty of suction to get the job done.
  • Customizable Settings: The Spectra lets you adjust both suction and cycle speeds. Stimulation mode has a cycle speed of 70 (perfect for initiating letdowns), and expression mode gives you a range from 38 to 54 cycles per minute. If you’re not sure where to start, try somewhere in the middle and tweak it as needed.

This pump has a vibration-style suction pattern, which many moms love. It mimics a baby’s natural nursing rhythm, and I think that’s a big reason it works so well. That said, if you’re sensitive to sensory inputs or prone to vasospasms, this might not be your favorite feature.

Design Details and Features

The Spectra has a lot of thoughtful design features that make it super user-friendly:

  • Built-in Night Light: Perfect for late-night pumping sessions.
  • Closed System: Keeps milk from backing up into the tubing, which is great for hygiene.
  • Flange Kit: The parts are pretty standard, and replacements are easy to find. I love that the tubing doesn’t need any special adapters—it’s just a simple, straightforward setup.

A little quirk worth mentioning: There’s a spot on the back of the pump meant to hold a flange, but it’s not super practical. I’ve seen moms use it for snacks instead—three Oreos fit perfectly in there. You do you!

Pros and Cons

Pros:

  • Reliable and high-quality
  • Customizable settings for suction and cycle speed
  • Closed system for better hygiene
  • Affordable replacement parts
  • Works well for single and double pumping

Cons:

  • Bulkier than newer wearable pumps
  • The S2 needs to be plugged in, limiting portability
  • Some Spectra flanges taper in a way that makes sizing or using inserts tricky

Is the Spectra Still a Top Pick in 2025?

In short, yes. The Spectra S1 and S2 are still near the top of my list. They may not be as sleek or portable as some of the newer wearable pumps, but their performance and reliability are hard to beat. If you’re a new mom, someone struggling with supply, or just want a pump you can count on, the Spectra is a safe and solid choice.



My Final Thoughts

If you’ve got a Spectra already, you’re in good hands. If you’re deciding whether to get one, I’d say go for it—especially the S1 if you can swing the slightly higher price for the battery. It’s not quite as trendy as some of the newer options out there, but it’s dependable, easy to use, and still gets the job done beautifully.

So, what do you think? Have you used the Spectra S1 or S2? Did you love it? Hate it? Let me know in the comments—I always love hearing your experiences. And if you’re still trying to decide on a pump, check out the quiz linked below to help you figure out the best option for your needs. Happy pumping!

Meet Allison Tolman, LPN, IBCLC!

She is the owner and founder of New Little Life, a company dedicated to providing objective information and support for pumping mothers. With 15+ years of experience in various pregnancy and postpartum fields including as an LPN, birth doula, childbirth educator, and IBCLC, her current research focuses on testing and exploring breast pumps to find the most practical way to help pumping mothers reach their goals as well as teaching lactation professionals to better understand the complex art of pumping. 

She runs a long-term coaching program to support working mothers who are pumping

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