DescriptionAstell&Kern SP4000 CopperThe Astell&Kern SP4000 Copper is the latest range-topping audiophile player from Astell&Kern, offering high-end luxury and stunning performance, Astell&Kern has set the standard for perfect sound using the latest innovative technology with the A&ultima series.The Astell&Kern SP4000 Copper is the newest flagship product that is the essence of everything learned and engineered over the last 10 years of digital music processing.Using proprietary ESA technology, the SP4000 significantly improves group delay, which is the time difference it takes for various frequencies to pass through an internal system. Each frequency reaches the output device at slightly different times, resulting in slight delays.If group delay varies too much across frequencies, it can affect clarity, imaging and timing. The proprietary ESA technology used in the SP4000 aligns frequency signals so they arrive more uniformly, minimising frequency distortion and enhancing sound clarity and purity.The Astell&Kern SP4000 is crafted from 904L stainless steel, which is the same grade used by luxury watch manufacturers, including Rolex. It has a PVD-coated ceramic back and ships with a Perlinger calf-leather case.Features:Full Android OS Support.Enhanced Signal Processing with Octa-Audio Circuitry Design.High Driving Mode.Proprietary Enhanced Signal Alignment Technology.Ultra Low Noise LDO Regulator for noise suppression.Advanced Digital Audio Remaster Technology.New 4.5 Generation User Interface.24-bit wireless streaming support via aptX Adaptive and LDAC.Luxury-watch grade stainless steel & ceramic design.Calf-leather case.ComparisonSP4000SP3000/SP3000MAdditional informationOSFull Android OS with Google Play SupportHeavily Customized Android OS with limited whitelist app supportGoogle Play Store support to install any Android appUser InterfaceAstell&Kern UI 4.5Astell&Kern UI 4Minor UI updateOp-AmpDual op-amps in parallel configurationSingle op-ampDual op-amps in parallel maintain low noise floor, black background of SP3000/SP3000M while providing greater power output to drive greater range of headphonesDAC Configuration4xAK4191 digital processor and 4xAK4499EX analog DAC2xAK4191 digital processor and 4xAK4499EX analog DACSP4000 has a dedicated digital processor to each analogue DAC SP3000/SP3000M has one digital processor per 2 analogue DACsBluetooth Codecsapt Adaptive/LDAC supportaptX HD/LDAC supportDAR Technology2nd generation Digital Audio Remaster (DAR) technology1st generation DARMore natural, refined sound when using DAR upsamplingEnhanced Signal Alignment (ESA) TechnologyNo ESAimproves group delayPower RegulationLow Noise Low Dropout Regulator (LDO)Better battery voltage stabilisation and noise suppression for cleaner, purer soundScreen6″ 2K (2160×1080) resolution touchscreenSP3000: 5.46″ Full HD (1080×1920) touchscreen SP3000M: 4.1″ HD (720×1280) touchscreen
