Outboard DACs

After collecting an EISA Award last year for a complete headphone system featuring a stack of four mini-sized separates – the Staccato, Tradutto, CH-Amp and PSU-3 [HFN Oct '22] – EarMen has doubled back with this minimalist ST-Amp. This is a book-sized, do-it-all unit combining a DAC and dedicated headphone amp, aimed at head-fi enthusiasts looking for a quick and effective path to high-quality desktop listening. So while the ST-Amp moniker might suggest it's simply a more affordable alternative to the aforementioned CH-Amp, it's really a different beast altogether.

Given that most of today's digital components seem to be multifunctional – streamer DACs, DAC/headphone amps and the like – it's unusual to find a product as simple in its operation as its design. Yet that describes the latest arrival from German manufacturer SPL, the £2499 Diamond DAC, available in silver, black or red like all the company's products. A back-to-basics DAC? Well, almost...

The product catalogue of Hong Kong's Lumin, neatly divided between four network players, three network transports, and one-off power amp and streaming amp options, deserves the description 'small but perfectly formed'. That would also be an apt way of looking at its T3, a network player/DAC possessing a neat, easy-to-accommodate design and a feature roster designed to satisfy the needs of the performance-hungry streaming audio enthusiast. In essence, it takes much of what's offered by Lumin's flagship one-box P1 [HFN Jul '22], but trims the spec. (and size) down to a price point of £4195, almost half that of its bigger brother.

ARose by any other name? As has happened in the past, Korean manufacturer HiFi Rose has launched a new version of an existing model – in this case its RS250 network player – with worthy specification changes and a suffix to set the two apart. But there's a mild inconsistency here, for when the company upgraded the RS150 [HFN Jun '21] to the current version, due to a DAC chip change forced upon the company by the 2020 fire at AKM's semiconductor plant in Japan, it became the RS150(B), selling for £3899, but the revised RS250 is now the £2349 RS250A, available in either silver or black finishes.

Boulder's founder and chief engineer Jeff Nelson gained his first audio engineering experience with studio mixing desks and the design of a professional cartridge tape unit. This led to a constructive interchange with the late Deane Jensen, the audio transformer wizard and the originator of a classic 'operational amplifier'. This was not an integrated circuit but one implemented at good power and wide bandwidth via the use of discrete devices.

Headphone use has changed in recent years, from something to be endured through necessity to its own subset of hi-fi listening, with no shortage of ambitious and upmarket hardware currently available. Now dCS is on that bandwagon, for while it's been busy launching its APEX DAC technology for its 'full-size' offerings [HFN Jun '22] it's also developed the Lina, which is not so much a headphone amp as a complete playback system.

Although UK readers might not recognise the EarMen moniker, it's certainly not a newcomer to the world of hi-fi. Its back story is quite convoluted, for although EarMen is based in Chicago, it's funded by the owner of Serbia's Auris Audio, Milomir Trosic, and most products are produced in the same Serbian factory. Auris is aimed at the premium market, with products including the Euterpe and the Nirvana – both headphone amplifiers lavishly adorned in wood and even leather – plus a neat line of luxurious-looking tube amps and even some turntables on offer.