![]() ![]() ![]() Draw is 50 watts in use, 5 watts in standby. An external voltage selector enables the same unit to work on 100-120 and 200-240VAC wall power. Mechanical specs are dimensions of 415x280x100mm WxDxH. It's a FIR-bared linear phase affair handled by a 3'648 millions multiply and add per second DSP. Finally, the digital filter is proprietary to the company. Max voltage swing is 8/16V, S/N ratio >110dB unweighted. Quoting off its spec sheet, the D1's analog inputs, without overloading, can process up to 8/16V on RCA/XLR respectively whilst showing their sources a 100KΩ input impedance. An uncompromised preamp must remain compelling even at whisper levels. That means tonal bleaching, weight loss and dimensional flattening. Digital attenuation works well over a restricted range. In my book, the latter is the only credible way to sell an amplifier-direct connection for any DAC with high-end pretensions. That's accomplished by way of single RCA/XLR input pairs-the D1 is fully balanced-and analog-domain resistor/relay volume in 256 x 0.25dB steps over a 64dB range with better than ☐.1dB accuracy. To wit, minimalist but bona fide analogue preamp functionality. I'd of course already looked over the feature list to have proper traction. The objective is to offer gear featuring musicality as well as aesthetics." With one out of two cited goals aced almost instantly, my curiosity about the musicality bit was piqued. Have harnessed extensive knowledge and experience in mathematics, electronics and communication With an aversion to cacophony, an aspiration for style and a penchant for simplicity, the founders The product PDF sketched out the company: "COS Engineering was founded by three close friends who are serious about audio entertainment. All Pacific rim folks of my acquaintance favour such a combination: Ronald Kwok, Sam Ngyuen, Simon Lee. ![]() This explained Maggie's European first name and Asian family name. Minimalist in the best Scandinavian design tradition, with only a flush-mounted but top-protruding volume wheel and pin-prick LED circle plus IR eye and engraved logo on the front, close inspection of the rear panel revealed a 'made in Taiwan' declaration of origin. "We are a new start-up company with limited funds for sales/marketing, hence we first aim for the US (we only speak English in addition to Chinese)." Not only was her English flawless, the proposed DAC/preamp called D1 was one natty dresser. Asking Maggie who their #2 choice might be, my name came up. He cited his predilection for NOS DACs and concomitant bias against all up/oversampling shenanigans as making him the wrong man for the job. After looking over the attached prospectus, our man in the US courteously declined. Review component retail in the US: $9'000Īfter introducing herself with a thumb nail photo of the product-the COS Engineering website just then was still under development-Maggie Chern announced that they would like to submit their maiden effort to Stephæn for review. Room: Irregularly shaped 9.5 x 10m open floor plan with additional 2 nd-floor loft wood-paneled sloping ceiling parquet flooring lots of non-parallel surfaces (pictorial tour here) Sundry accessories: Acoustic System resonators Power delivery: Vibex Granada/Alhambra on all components, GigaWatt PF-2 on ampsĮquipment rack: Artesania Audio Exoteryc double-wide 3-tier with optional glass shelves, Rajasthani hardwood rack for amps TR-3D subwoofer Zugspitz Klang Seligkeit Ĭables: Complete loom of Zu Event KingRex uArt, Zu and LightHarmonic LightSpeed double-header USB cables Tombo Trøn S/PDIF van den Hul AES/EBU AudioQuest Diamond glass-fibre Toslink Arkana Research XLR/RCA and speaker cables, Sablon Audio Petit Corona power cords Loudspeakers: Albedo Audio Aptica soundkaos Wave 40 Boenicke Audio W5se Zu Audio Submission German Physiks HRS-120, Gallo Strada II w. Power & integrated amplifiers: Pass Labs XA30.8 FirstWatt SIT1, F6 Crayon Audio CFA-1.2 Goldmund Job 225 Gato Audio DIA-250 Aura Note Premier Wyred4Sound mINT AURALiC Merak Preamplifier: Nagra Jazz, Esoteric C-03, Bent Audio Tap-X super-clock upgrade & mBPS-d2s, Apple iPod Classic 160GB (AIFF), Astell& Kern AK100 modified by Red Wine Audio, Cambridge Audio iD100, Pro-Ject Dock Box S Digital, Pure i20 16GB RAM running OWS 10.8.2, PureMusic 2.02, Audirvana 1.5.10, Metrum Hex, AURALiC Vega, Aqua Hifi La Scala MkII, SOtM dX-USB HD w. ![]()
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