amp

I've long admired Pro-Ject turntables, but I was only vaguely aware of their electronics line so it was high time to check out one of their amplifiers. I requested their baby amp, the Stereo Box S ($299). It's the smallest power amp I've ever seen, a mere 4.1 by 1.4 by 4.8 inches, and the build quality of its all-metal chassis felt robust. The amp is available in silver or black finishes. A remote control adjusts volume and switches between two RCA inputs. The gold-plated speaker binding posts are really pretty small, and so … Read more

If you've been hit by a natural disaster recently, you know you can't put too high a price on mobile power supplies.

If your phone is dead and the grid is unreliable, JuiceCans are one way to keep communicating with loved ones.

This Indiegogo fundraising project centers on a stackable USB power pack called a JuiceCan. Add more packs to form a JuiceCane and you get more power. … Read more

Windows is so full of fonts that they'd fill a warehouse if they were cast-metal typesets, but it doesn't go out of its way to make them easy to manage. That's where tools like AMPsoft's AMP Font Viewer come in. Font Viewer can install and uninstall fonts, sample them, and organize them into categories. This lightweight freeware is compatible with nearly every version of Windows still in use, even 9x releases from the 1990s. Regular updates are logged on the program's Web site. We tried Font Viewer in 64-bit Windows 7 Home Premium SP1.

Font … Read more

I'm a lucky guy, I've heard most of the world's very best headphones: Sennheiser's HD 800 and their legendary Orpheus, the Audeze LCD 2 and 3, the Stax SR-007 ($2,600), SR-009 ($5,200), and now I'm spending quality time with Hifiman's flagship HE-6 planar magnetic headphones. I've long admired Hifiman's designs, starting with their very first model, the HE-5 back in 2009. The HE-6 looks nearly identical to Hifiman's current HE-4, HE-400, HE-5LE, and HE-500 headphones, but the HE-6 is heavier (502 grams), and it feels like it's built … Read more

John Seaber started JDS Labs in 2007 with the cMoyBB headphone amp, which is based on an open-source design. Seaber revamped the cMoy's power supply and volume control, added a DC power jack, and a special bass boost switch. The tiny amp sold well and got the company off the ground. The cMoyBB is still being made, in an Altoids tin box, and currently sells for $60. Seaber is 26 and has an electrical engineering degree from Missouri S&T University.

The JDS Labs Objective2 (02) sells for $144, and it's equally adept with full-size and in-ear … Read more

The Burson Soloist looks and feels like a scaled down high-end stereo power amplifier, but the Soloist is a headphone amp. The chassis is constructed from thick slabs of machined aluminum that dissipate the heat from the amp's Class-A electronics. The amp would appeal to Ferrari and Leica camera owners who appreciate no-holds-barred industrial design. The Soloist is the real deal.… Read more

It was just a few weeks ago when my buddy Tyll Hertsens was raving about Colin Shaw's Sicphones amplifier Kickstarter project. Hertsens never steers me wrong, so I contacted Shaw, and a few days later I received the amp. Hertsens was right. This design uses a newly available SemiSouth silicon carbide transistor, and the amp sounds amazing. If Shaw makes his Kickstarter goal he'll be able to sell amp kits for as little as $229, and assembled amps for $279! DIY-ers can spring for just $35 and get the Sicphones amplifier PC board, assembly instructions, and parts source … Read more

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Follow Steve Sphere Guttenberg on Twitter.

Bathroom break video: Steve Coogan impersonates Steve Hawking.… Read more

Some "portable" headphone amplifiers aren't all that small, but the Firestone Audio Fireye Mini is downright tiny.

It's just 1.5 inches by 1 inch by 0.5 inch, and the soft-rubber-shelled amp weighs almost nothing, so you can hang it off your iPod, iPad, iPhone or any device with a 3.5mm headphone output. Plugging in a headphone turns the Mini on and lights a bright blue LED, unplugging turns the amp off. Charge the Mini via the USB connection and it'll play for up to 24 hours. It's available in green, gray, purple, red, and white.

The Mini is no giant-killer, but it definitely bumped up the detail and resolution of my Monster Turbine Copper, Ultimate Ears UE-4, and vPulse in-ear headphones.… Read more