Steve Guttenberg

Performance
Build Quality
Comfort
Value

AT A GLANCE
Plus
Big on comfort
Lifetime warranty
Timbrally rich
Minus
Lacks mic and phone controls

THE VERDICT
The Koss Pro4s doesn’t sound like your daddy’s Koss, not by a long shot. It’s the best new Koss in ages.

Koss was founded in 1958, so it’s as old-school American hi-fi as you can get, and I’d bet lots of older audiophiles have fond memories of their Pro4AA headphones from back in the day. Koss still makes that headphone, and sound-wise, it’s about as subtle as a 1970 Chevelle SS 396 muscle car. As for this new Pro4S, it’s closer to a new Camaro—the sound is far more refined. The sharply sculpted, cast-aluminum ear cups are the first clues; the handsome design has a contemporary look and feel.

Krell's new Resolution Series speakers are all about pure hedonistic pleasure. Think of them as the speaker equivalent of a fire-breathing, 500-horsepower Dodge Viper SRT/10. But hold on a sec: The Resolutions are more than an exercise in brute force engineering. Their manifest also includes incredible precision, hyperclarity, and ultra-low distortion. Forget the Viper; the Resolutions are closer to a Porsche 911 GT3.

Performance
Build Quality
Comfort
Value

AT A GLANCE
Plus
UE’s tip-fitting system ensures a perfect fit
User-replaceable cables
Sweet, nicely detailed sound
Minus
Premium pricing

THE VERDICT
The Ultimate Ears UE900s look, feel, and sound right, they’re big on transparency, without shortchanging body and soul.

I was in for a big surprise when I opened the Ultimate Ears UE900s box. The headphone not only comes with a generous selection of sizes and types of ear tips, UE’s color-coded, systematic fitting process makes it easier than ever to achieve the perfect fit. This ensures maximum isolation from external noise and the full bass potential of the UE900s.