Phono Preamp Reviews

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American Hybrid Technology phono preamplifier

Just as the Trappist Monks of Digital Audio are once again grabbing at the bellpulls to ring the death knell of analog, another fine piece of gear pops up dedicated exclusively to LP playback: the American Hybrid Technology Phono Stage. To one of the Analog Committed, this is good news. That the unit sounds as wonderful as it does is even better news. Anything else? Pull up a pew, Brother.

The Mod Squad Phono Drive phono preamplifier

Thomas Alva Edison may have had a fully equipped laboratory, with a team of assistants slaving every day over ideas to be adopted when ripe as those of the great inventor, but the image of American ingenuity which rings true to me is of the lone tinkerer, working alone and mixing a generous dose of good ol' Yankee know-how with the sweat of his brow—a lot of it. These days, with the faithful PC and a hardworking CAD program at his side to do the math, the lone tinkerer seems to be thicker on the ground than ever, to judge by the humongous numbers of small companies selling high-end hi-fi components as revealed in Stereophile's readership survey (see p.5). Whether these loners will ever rise above their origins depends, among many other things, on their ideas being truly worthwhile.

Nagra VPS phono preamplifier

Not that many years ago, it seems, every sound crew in Hollywood and around the world recorded production sound using a compact, open-reel analog tape recorder made by Nagra. The first iteration of the Swiss-made machine appeared in the early 1950s. Shortly thereafter, with the addition of an inaudible recorded tone that allowed easy syncing to picture, the Nagra recorder became the industry standard, and remained so through the 1980s. To this day, Nagra's line of audio products retains the look of those early recorders.

AQVOX Audio Devices Phono 2Ci phono preamplifier

The German company AQVOX Audio Devices has produced an innovative moving-coil/moving-magnet solid-state phono preamplifier, the Phono 2Ci, that's as intriguing for its technology and performance as it is for its relatively low price: $1400. The zero-feedback, op-amp–free circuit uses a compact switch-mode power supply that's built into the chassis and features conventional voltage gain for moving-magnet cartridges via its RCA jacks, and current gain for moving-coil cartridges through the balanced XLR inputs. Rear-panel switches select between RCA or XLR inputs and offer a convenient ground lift. Either the single-ended or the balanced outputs can be used with either input. Unfortunately, the tight spacing of the RCA input and output jacks, which are mounted on the circuit board, will somewhat limit your choice of cables: Pairs of thick-barreled plugs will have difficulty fitting.

Expressive Technologies SU-1 moving-coil step-up transformer

What's this? A review of a $3000 moving-coil step-up transformer in this digital day and age? Yep. Although the market for such a product is small, the fact that the Expressive Technologies SU-1 step-up transformer enters previously uncharted state-of-the-art territory warrants these pages of editorial space. Furthermore, LP playback appears to be alive and well at the upper end of the high-end spectrum, a market segment addressed by the SU-1 (footnote 1).

Krell KPE & KPE Reference phono preamplifiers

The Krell">http://www.stereophile.com/solidpreamps/694krc2">Krell KRC-2 can be regarded as a remote-controlled successor to Krell's successful KSL preamplifier of a few years back. The outboard Krell Phono Equalizer (KPE) is a separate box powered from the KRC-2. Priced at $850, it contains a printed circuit board very similar, in fact, to the $499 unit that can be fitted within the KRC. The KPE and KRC phono stages are well-designed universal units; if someone has the need for a stand-alone phono equalizer of Krell KRC standard, a separate power supply may be purchased for the KPE. It is also an advantage to be able to locate the KPE head amplifier in a hum-free zone near the LP turntable.

Simaudio Moon LP5.3 phono preamplifier

Simaudio's Moon LP5.3 MM/MC phono preamplifier ($1400) is silly good! It has single-ended RCA inputs and both single-ended and true balanced-differential outputs. It also offers a wide range of adjustments for gain (54, 60, and 66dB), resistive loading (10, 100, 470, 1k, and 47k ohms), and capacitive loading (0, 100, and 470pF), all accomplished via a series of internally mounted jumper banks. You can even choose RIAA or IEC equalization. Removing the top plate to get to the adjustments reveals boards filled with high-quality parts for the well-isolated power-supply and signal-handling circuits.

ASR Basis Exclusive phono preamplifier

"Everybody's gotta get into the act!" Jimmy Durante used to say. That's what's happening with phono preamplifiers—they just keep being built, and I keep getting them for review. Up for evaluation in next month's column are new models from Perreaux, Musical Fidelity, Graham Slee, and a Chinese one, Ming Da. You can bet there'll be more.

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