We have all been there: the midnight snack that alerts the entire household with a door slam and a series of high-pitched “beeps” that feel like a security alarm. After putting both the Breville Smooth Wave and the Breville Compact Wave through their paces in my own kitchen, I’ve realized that Breville isn’t just selling microwaves; they are selling kitchen harmony.
This isn’t a “bigger is better” debate. It is a choice between a High-Performance Inverter that mimics a stovetop’s steady simmer and a Space-Optimized Workhorse that brings premium manners to a small counter. Here is my deep-dive into which of these “Quiet Luxury” machines belongs in your home.
The Key Difference: Breville Smooth Wave vs Compact Wave Microwave Oven
If you strip away the stainless steel, the true divide is found in the Magnetron Management.
- The Smooth Wave (Inverter Precision): Most microwaves are binary – they are either 100% on or 0% off. To give you “50% power,” they simply cycle on and off every few seconds. The Smooth Wave uses an Inverter to actually lower the output to 50%. It is a constant, gentle flow of energy. This is why it can melt chocolate without seizing it or defrost a steak without “cooking” the edges.
- The Compact Wave (Optimized Pulse): The Compact Wave uses the traditional transformer-and-capacitor method. It is highly efficient for its size, but it relies on those power pulses. To compensate, Breville has engineered the presets to be smarter, using lower power thresholds to minimize the typical “hot spot” issues of smaller microwaves.
Technical Comparison Table: Breville Smooth Wave vs Compact Wave Microwave Oven
| Metric | The Smooth Wave (BMO850) | The Compact Wave (BMO650) |
| Footprint Category | Full-Size Countertop | Small-Space Specialist |
| Raw Power | 1250 Watts | 900 Watts |
| Cavity Volume | 34 Liters (1.2 cu. ft.) | 25 Liters (0.9 cu. ft.) |
| Technology | Sensor iQ & Inverter | Food Menu & Transformer |
| Sound Profile | 50% Quieter Operation | 50% Quieter Operation |
| Internal UI | Hidden Shortcut Panel | External Direct Buttons |
| Turntable | 12.4″ Glass (Switchable) | 10.6″ Glass (Fixed) |
| Weight | 33.5 lbs | 25.1 lbs |
| Buy On Amazon |
Detailed Comparative Review: The User Perspective
Design: The End of the “Microwave Thud”
The first thing I noticed when unboxing these was the build quality. The Smooth Wave is a beast – it has the heft and finish of a professional oven. The Compact Wave, however, surprised me. Usually, “compact” is code for “flimsy,” but this unit feels incredibly solid.
The Soft Close Door is the star of the show. I tested this at 2:00 AM while the rest of the house was asleep. You can essentially “flick” the door, and it catches itself, gliding shut with a whisper. It’s a psychological shift; you stop bracing yourself for the noise. The Smooth Wave’s brushed stainless steel finish is more premium, while the Compact Wave’s silver fascia is easier to keep smudge-free.
Ease of Use: Logic vs. Layout
The Smooth Wave uses a dial-based system that I found much more intuitive than standard number pads. You spin the dial to set your time or weight, and the LCD screen gives you clear, high-resolution feedback. It feels like using a piece of high-end audio equipment.
The Compact Wave sticks to a more traditional button layout but optimizes it. The “Food Menu” is located on the front panel, giving you one-touch access to the things people actually use: Popcorn, Beverage, and Reheat. In my daily routine, the Compact Wave felt faster for a quick coffee warm-up, whereas the Smooth Wave felt more appropriate for preparing actual meal components.
Functions: The “Sensor iQ” Advantage
I ran a “Reheat Challenge” with a bowl of leftover mashed potatoes – a notorious microwave-killer.
- The Smooth Wave used its Sensor iQ. It actually waited until it detected steam before calculating the remaining time. The result? No dry skin on top and a perfectly hot center.
- The Compact Wave required me to guess the time. I used the “Reheat” preset, which used a lower power level. It took about 30 seconds longer, and while the potatoes were good, they weren’t as perfectly uniform as the Inverter-driven results.
The Smooth Wave also features the “A Bit More” button. It sounds like a gimmick until you use it. When the timer ends and you realize your soup needs just a tiny bit more heat, one press adds a perfectly calculated increment without making you start a new cycle.
Maintenance: The “Sound Suite” Experience
Both models allow you to enter the “Sound Suite.” I hate the standard “BEEP BEEP BEEP” of appliances. On both Brevilles, I was able to change the end-of-cycle sound to a much more pleasant chime, or mute it entirely.
Inside, the Smooth Wave has a slight advantage for cleaning because you can turn the turntable off. If you have a spill in a large rectangular dish that doesn’t rotate, it’s much easier to manage. The Compact Wave is smaller, which means there are fewer “corners” for splatters to hide in, but the 900-watt power means it doesn’t get as steam-cleaned from spills as the 1250-watt unit does.
Breville Smooth Wave Oven (The Perfectionist)
Pros:
- True Inverter: The only way to cook delicate foods without scorching.
- Massive Power: 1250 watts means significantly shorter wait times.
- Sensor iQ: True “Set and Forget” technology that actually works.
- Premium Aesthetic: Real brushed stainless steel that matches high-end kitchens.
Cons:
- Countertop Real Estate: It is deep – check your measurements before buying.
- Investment: You are paying for the technology, not just the box.
Breville Compact Wave Oven (The Efficiency King)
Pros:
- Urban Friendly: Perfect for apartments, offices, or secondary bars.
- Soft Close Luxury: You get the best feature of the expensive model for less.
- Simplified UI: No learning curve; the buttons are exactly where you expect.
- Lightweight: Easy to move or store in a pantry when not in use.
Cons:
- No Inverter: Not ideal for delicate melting or large-scale defrosting.
- No Interior Shortcuts: You lose the handy “inside-door” menu of the Smooth Wave.
The Verdict: Which “Wave” Should You Ride?
The choice between these two depends entirely on your Culinary Ambition.
I recommend the Breville Smooth Wave (BMO850) if:
The microwave is a core part of your meal prep. If you use it to defrost meat for dinner, melt butter for baking, or reheat complex meals like casseroles or pasta, the Power Smoothing Inverter is a non-negotiable upgrade. It treats food like an oven would, just faster.
I recommend the Breville Compact Wave (BMO650) if:
Space is your primary constraint but you hate “cheap” appliances. If you primarily use your microwave for tea, popcorn, and quick leftovers, you don’t need the 1250-watt inverter. You want the Soft Close silence and the reliable Breville build quality without losing 20 inches of counter space.
My Personal Take: If you have the space, the Smooth Wave is the one. The Sensor iQ technology isn’t just a bell or whistle – it genuinely changes the quality of the food. It’s the first microwave I’ve owned that I actually trust to “cook” rather than just “burn.”
Frequently Asked Questions
Can the Compact Wave fit a 12-inch pizza?
It can fit most standard 10.5-inch dinner plates. A true 12-inch pizza might struggle to rotate on the turntable. For larger items, the Smooth Wave is the better bet.
Does “80% quieter” refer to the fan or the door?
The 80% specifically refers to the Soft Close door mechanism compared to a standard “push-button” microwave latch. However, both units are also roughly 50% quieter in actual operation (the fan and magnetron) than entry-level microwaves.
How does “Smart Reheat” work?
In the Smooth Wave, the Sensor iQ measures the humidity levels inside the cabin. When food heats up, it releases steam. The sensor detects the rate of steam increase to determine when the food has reached a core temperature of approximately 165°F.
Is the “Child Lock” hard to deactivate?
No, it’s a simple long-press of the dedicated button. It is designed to be “toddler-proof,” not “adult-frustrating.”
Why would I want to turn the turntable off?
On the Smooth Wave, if you have a large, heavy rectangular lasagna dish that would hit the sides if it rotated, you can turn the motor off. The Inverter technology helps ensure the food still heats relatively evenly even without the rotation.
