It was perhaps Benchmark that set a trend by equipping its compact, high-value DACs with a capable headphone amplifier. They became, in effect, an amalgam of DAC, headphone amplifier and simple preamp, and the HA-1 is from the same mould.
Much of its electronics derives from Oppo’s BDP-95EU and BDP-105 universal disc players [HFN May ’12 and Jan ’13]. The HA-1 uses the same ESS 9018 Sabre DAC and the same output circuitry but the headphone amp and preamplifier stages are new.
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’.
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.
This is the largest floorstander in Dynaudio’s Excite range: a new series of entry-level speakers from the Danish company, all designed to be easy to drive. And the X38 not only looks considerably more sleek than the 380 floorstander we tested from Dynaudio’s Focus series [HFN Jun ’13] but it comes at only half the price.
The X38’s twin long-throw woofers and midrange driver have supple rubber surrounds and one-piece cones formed for smooth dispersion. They are made of Dynaudio’s magnesium silicate polymer [MSP] for light weight and high rigidity, while the drivers’ chassis are die-cast aluminium, with neodymium magnets and large but lightweight voice coils.
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.
At the pinnacle of JBL’s loudspeaker range, the Everest is a monster of a speaker weighing 142kg and priced at a whopping £35k each, its 250-litre enclosure 1110mm wide to accommodate two 15in drivers side by side. While it doesn’t require an enormous listening space, a room does need to be adequately wide in order to space a pair apart satisfactorily.
The Everest has been JBL’s flagship ‘Project’ speaker for nearly three decades. Carried over from the out-going model are the speaker’s two horn-loaded beryllium compression drivers: the 100mm diameter 476Be high frequency unit and the 25mm 045Be-1 ‘UHF’ supertweeter, working up to a claimed 60kHz.
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.
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.
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.
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.
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