Budget Component Reviews

Class-D audio amplifiers: What's the argument for them? Class-A audio amplifiers: What's the argument against them? Class-AB amplifiers: Why does everybody make them? Each of these amplifier output architectures has strengths and weaknesses. Each will interface more or less successfully with a given loudspeaker in a given room. Each has a distinctive sonic signature. Consequently, as knowledgeable audiophiles with a laundry list of system-building goals, we are required to choose the amplifier type that best suits our speakers, our room, and our individual musical-aesthetic predilections.

A visitor to stereophile.com named billmilosz commented: "Compared to these, everything else sounded like it was coming out of a cereal box." When I read that, I laughed out loud.

That reader was responding to my AXPONA report about Magnepan's new $650/pair Little Ribbon Speaker (LRS)—which I presume he also heard at the show.

I have reviewed several network-connected music servers in recent years, from Antipodes, Aurender, and NAD. All performed well but are relatively expensive, and their associated player apps didn't equal Roon's user friendliness in terms of interface, organization of the library, and inclusion and updating of metadata. So when Roon Labs introduced their own server, the Nucleus+, I first reviewed and then purchased it, along with a lifetime subscription to Roon. But at $2498 without an internal drive for storing music files, the Nucleus+ is still relatively expensive, and even Roon's less-powerful Nucleus costs $1398. I was still on the lookout for a server that would be more accessible to our budget-minded readers.

I keep getting older. By the time you read this, I will be genuinely old. When I was genuinely young, I bellyached, "Wires are the worst part of hi-fi—there's gotta be a way to get rid of them." I first made that statement when audio electronics and loudspeakers both still nestled inconspicuously in proper bookcases. Back then, people sitting on the sofa weren't forced to stare at diverse audio boxes and ungainly wires.

If you've ever dipped your toe into some form of high-performance motor sport, you know: The best race-car engines spin torque and exhale horsepower—with intoxicating ease. They're engineered to be responsive. Depress the clutch, toe the throttle, and watch the tachometer instantly pin itself. Engage the clutch—your chest contracts and your head gets light. Then later . . .

Back in your Ford Fiesta, its revving engine sounds distant, muffled. Your body can't feel the powerplant's power. In gear, the Ford feels soft and hesitant, not responsive.

The original PS Audio Sprout, which I reviewed in the May 2015 issue, showed newcomers an easier, smaller way to amplify music recordings in the home. At $599, the Sprout100 costs $100 more. It fixes a few of the old Sprout's weirdnesses: no power-on indicator light, no remote control, five-way binding posts that weren't really five-way. It also doubles the Sprout's class-D power output into 4 ohms, from 50 to 100Wpc (or 50Wpc into 8 ohms), and adds a few sonic and mechanical enhancements.

I got an e-mail last summer from my colleague Tyll Hertsens, editor of our InnerFidelity website. "Recently reviewed and really liked the new MrSpeakers Æon," he wrote. "They're a little rough-sounding as sealed headphones tend to be, but the tonal balance is superb. I got three in for review to make sure they're consistent. After measurements I asked [MrSpeakers'] Dan Clark if I could forward them to you because I like them so much and thought you should hear them. . . . I really think you may enjoy them."