Hi-Fi News Staff

Hi-Fi News Staff  |  Jan 22, 2015  |  0 comments
Schiit products benefit from a Scandinavian nomenclature – Asgard, Bifrost, et al – so, should this stunning little Magni headphone amplifier prove tempting, you needn’t approach the salesman with the embarrassing request, ‘Do you stock Schiit?’ As its company founders are seasoned designers of [quote], ‘fully balanced differential power amplifiers, fully discrete I/V conversion stages, audiophile D/A converters, relay-switched stepped attenuator volume controls in preamps, etc,’ they could have launched Schiit with whatever product genre they liked. Being savvy, they chose headphone amps. Schiit works with ‘simple, discrete circuit topologies’ for the analogue sections, while its DAC products feature ‘innovative bit-perfect management systems’. It also uses Class A amplifier designs ‘where practical – and single gain stages when possible’.
Hi-Fi News Staff  |  Jan 22, 2015  |  0 comments
Teac’s HA-501 is a Japanese product of the old school, with no-nonsense looks and a quality of fit and finish that belies its £700 asking price. Teac highlights a number of aspects of the 501’s circuit design. First that it operates in Class A, as evinced by the case running warm to the touch. Second, dual mono construction is clear when you remove the top plate to reveal two identical circuits side by side on the main PCB.
Hi-Fi News Staff  |  Jan 22, 2015  |  0 comments
This tall floorstander takes its place as the top model in Elac’s Line 400 series. All use the JET 5 tweeter, Elac’s development of a concept patented by Dr Oskar Heil called the Air Motion Transformer (AMT). In the Heil AMT, the moving element is a very light plastic membrane that carries a fine metal track to conduct the audio signal. Suspended between powerful magnets, this membrane moves when current flows.
Hi-Fi News Staff  |  Jan 22, 2015  |  0 comments
Here’s a stylish new Meridian product right in the mainstream: a headphone amp/USB DAC with optional outboard PSU. It wouldn’t be a Meridian, though, without having some novel features. The cases are interlocking aluminium extrusions, double-skinned to enhance screening, and having no visible fasteners holding it together – clever. The PPS power supply is not dedicated to the PHA headphone amp but provides five 12V/500mA DC outputs on mini-DIN sockets, each incorporating dual-stage linear voltage regulation, for powering other Meridian products as well.
Hi-Fi News Staff  |  Jan 20, 2015  |  0 comments
We ran the scoop review of MF’s debut Nu-Vista unit over 15 years ago [HFN Aug ’98]. Now the company has this new nuvistor-equipped integrated amp, having recently found a company to make the requisite tube bases. Blessedly, it eschews gadgetry offering just a remote, a switchable display of input and level, home theatre pass-through for one of the four line inputs and extra speaker terminals for bi-wiring. The Nu-Vista 800 has a fascia machined from solid aluminium and sides fitted with attractive heatsink extrusions – it even comes with spikes for the feet and with cups too, to protect floor finishes.
Hi-Fi News Staff  |  Jan 20, 2015  |  0 comments
Ifyou’re old enough to remember Audio Research gear circa-1972, the new SP20 will tug at your heartstrings. This preamp’s fascia designer has revived the distinctive sectioned faceplates of the SP3 – the whiff of retro is much appreciated. Suffice it to say, gone are the days of a half-dozen toggle switches, mechanical push-buttons or old-school rotaries. The SP20’s buttons are limited to power on, mute and a choice of output to ‘speakers’ (power amp) or headphones, but not at once.
Hi-Fi News Staff  |  Jan 20, 2015  |  0 comments
At last, Levinson’s flagship No53 monoblock amplifiers [see HFN Jan ’11] now have a Reference-status preamplifier with which they may be rightly partnered. The No52 is a two-chassis component designed with meticulous attention to detail both in its topology and in features that offer comprehensive system configurability. The rationale of this approach is to isolate the pure analogue audio circuitry from any possible source of pollution: it physically separates the power supply and microprocessor-driven controls from the audio electronics contained in the larger chassis. Volume control is via a precision ladder resistor network with fine gain adjustment in 0.
Hi-Fi News Staff  |  Jan 20, 2015  |  0 comments
Like the hardy perennials of audio horticulture, the standard valve amplifier circuits keep coming up fresh year after every year. And there’s been a new flowering in the family of beam tetrode tubes that started with the venerable KT66. This is the new Tung-Sol KT150, and the first manufacturer to feature it is Icon Audio, showing this tube off to good advantage in its MB90 MkIIm monoblock power amp. Built in Icon’s factory in China but finished and tested in Leicester, the MB90 MkIIm looks solid and handsomely-proportioned.
Hi-Fi News Staff  |  Jan 20, 2015  |  0 comments
Krell’s new iBias range is claimed to be more efficient, or less power-hungry, than pure Class A. Paul Miller suggests that iBias is a modern take on the popular sliding bias circuits of the 1980s. So what is the motivation for it? Statements from the company suggest that Krell is doing its part to modernise the high-end, to increase its appeal to audiophiles who are not comfortable with bulky intrusions into their living spaces in a manner acceptable in the past. And yet nothing differentiates the Duo 300, physically, from hundreds of other ball-buster amps.
Hi-Fi News Staff  |  Jan 20, 2015  |  0 comments
User-friendly features are a major aspect of the current VTL Signature Series, including the power amp reviewed here. Based on four 6550 output tubes per channel, it has newly-designed output transformers, a larger power supply, and the Signature Series control electronics. When running, the tubes can be seen discreetly glowing through the smoked glass front window. (Our sample was fitted with KT88s, an option that adds £200 to the price.

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