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The release of a 5,120x2880-pixel wallpaper image indicates that Apple could bring high-resolution Retina displays to its iMac line of desktop all-in-one computers and external monitors.

The 3.3MB "OSX_hero_2x" image shows the blue and green ocean wave that's featured in the upcoming OS X Mavericks version of Apple's operating system. Its width and height are exactly double that of of the 2,560x1,440-pixel screen on the current 27-inch iMac.

Marvin Scharle of German Web site design firm Conclurer flagged the high-res Mavericks wallpaper on Twitter.

As Apple has spread its Retina displays across … Read more

Did you switch to Android and end up missing the iPhone's contacts app? Hi Contacts aims to give you the best of both worlds. It's nowhere near as smooth as the default app on Androids or iPhones, though. That lack of convenience will ruin it for most users.

The app is designed to look exactly like the contacts viewer on iPhones. It is a good double and even mimics the iPhone's contact cards seamlessly. It does add banner ads that get in the way big time, though. You can get rid of them for a fairly steep $… Read more

Hi SMS offers a nice skin for your texts, but it doesn't have many of the features you probably need from iPhone's app. It's a decent way to transition from it, though.

As you might have guessed, this app is designed to look exactly like iPhone's text-messaging inbox. There is one thing keeping it from doing that exactly--the ads. They're nowhere near as bad as some apps, but they wouldn't appear in an iPhone app. They tend to get in the way if you have a smaller phone, too. Since Hi SMS is only … Read more

I've said it many times: the very best audio is frighteningly expensive, and so are the world's best cars, cameras, clothing, boats, and so forth. The good news is there are really pretty spectacular finds at the other end of the audio rainbow. I love it when I come across an over-performing budget-priced speaker, and lately, I've found quite a few. Here's a newly revised list of standout designs.

Since this list covers a broad range of speaker types, there's no ranking order; each one is exceptional in its own right. I have spent time … Read more

PSB Speakers is one of my all-time favorite brands. Its little Alpha B1 monitor ($299 a pair) is excellent, and a couple of years ago I was blown away by the Imagine Mini ($759 a pair), an even smaller but bona fide high-end speaker.

Small speakers are great, but the lucky folks with huge living rooms who like to occasionally play movies and music nice and loud need big speakers. And since it's been a while since I spent quality time with a PSB tower I requested a pair of Image T6s ($1,298 a pair).

The 40.… Read more

When you pedal a bicycle, the kinetic energy is channeled into propulsion, but what if it could be used in other ways? Architect Michael Strain isn't the first to think of using pedal power to charge your gadgets -- in fact, there are products on the market that already allow you to harness that excess energy -- but his concept bike, has a few other tricks up its suspension.

The bike, called Levitation and designed for the 2013 Hi-Macs Annual Design Contest, looks like a more low-tech Tron Cycle. It features an on-board generator and battery that stores the power collected while cycling. The power can then be used in two ways: charging small gadgets via the USB port on the bike's handlebars, or sending it into your home's power supply via a drain cable to alleviate grid usage. … Read more

The Wilson Alexia speakers and Dan D'Agostino electronics in the Innovative Audio room at the New York Audio Show stopped me in my tracks. I heard a lot of great gear at the show, but the sound in that room was closer -- a lot closer -- to the sound of the real thing than anything else. The system had a "this is happening now" quality that takes you back to the recording session, proof that cutting edge high-end gear is getting better all the time. Yes, ubergear prices are in the stratosphere, but there were plenty … Read more

Subwoofers are used in most home theater systems, but subs can also radically improve the sound of stereo systems -- and not just the ones with small speakers. Subs can provide a foundation to the sound that few speakers can muster on their own. So adding a sub is not just about adding more and deeper bass; rather, a properly integrated subwoofer can improve the overall sound of the system.

Subwoofer connection to a two-channel system differs from the methods used in home theaters. AV receivers feature bass management to direct the low bass frequencies to the sub and the … Read more