What Is a Preamp, and Do I Really Need One?

Every audio system requires amplification. In a traditional hi-fi set-up, the loudspeakers are always “passive”—which is to say, they don’t produce their own power. Instead, they must receive an amplified audio signal from an external source, aptly called an amplifier, in order to do their thing. Even in a more modern, self-contained audio system (like…

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Best Used Cars: 10 Top Picks for August 2025

By looking at how cars performed in our tests when new and reviewing detailed reliability data, CR can point car shoppers to models that promise the best overall ownership experience. But it’s important to note that great new cars don’t always make great used cars, especially when factoring in depreciation and long-term reliability.  We pick…

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How to Choose the Right Size Generator

To determine the size generator you need, make a list of the appliances you want to power and add up their wattages. And here’s a tip: If you’re considering a portable generator, don’t spring for one that produces a lot more power than you’ll be using. “There’s no need to go larger unless you want…

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How to Increase Your Laptop’s Battery Life

If you only do one thing, do this. The biggest power hog in your laptop is, by far, the screen. The brighter it is, the more power it consumes. Unless you’re working under direct sunlight, you probably don’t need it at its highest setting. Lowering the brightness is as simple as tapping a function key…

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10 Tips to Get the Most Out of a Tank of Gas

3. Minimize travel. If you can delay errands or other activities, you’ll preserve the gas that you purchased and reduce overall consumption for the region, helping in some small way to reduce gas scarcity.  4. Obey speed limits. When you drive, follow the speed limits and drive smoothly. Your driving habits can play a significant…

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3 Best Rowing Machines of 2025, Lab-Tested and Reviewed

CR’s testers assess rowing machines to evaluate their construction quality, their ability to accommodate a range of body sizes and shapes, ease of use, and potential safety risks to users. To evaluate a machine’s ergonomics, we had five men and five women row on each machine, to see how it fit various users and to…

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