{"product_id":"accuphase-dg-78-digital-graphic-equalizer","title":"Accuphase DG-78 Digital Graphic Equalizer","description":"\u003ch1\u003eAccuphase DG-78 Digital Voicing Equalizer at Vinyl Sound Buffalo, NY USA\u003c\/h1\u003e\n\n\u003cp\u003eThe Accuphase DG-78 is a high-end digital voicing equalizer and acoustic analyzer from Accuphase (Yokohama, Japan), available at Vinyl Sound in Buffalo, NY USA. The successor to the DG-68 released in 2020, the DG-78 represents a comprehensive upgrade in user interface and digital performance while retaining the three-mode operational structure that defines the DG series: Voicing (manual EQ), Equalizer (parametric correction), and Analyzer (real-time spectrum analysis with microphone measurement). Key advances include a new \u003cstrong\u003eelectrostatic touch panel display\u003c\/strong\u003e replacing the previous pressure-sensitive interface, an ultra-high-speed \u003cstrong\u003eAnalog Devices SHARC ADSP-21565 DSP\u003c\/strong\u003e enabling native 384kHz processing without downsampling, \u003cstrong\u003efour parallel AKM AK5578EN 352.8kHz\/32-bit ADC channels per channel\u003c\/strong\u003e, and the same \u003cstrong\u003eeight ESS ES9028PRO DAC chips in parallel with ANCC\u003c\/strong\u003e as the DC-500 processor, arriving mid-2026 at Vinyl Sound Buffalo, NY USA.\u003c\/p\u003e\n\n\u003ch2\u003eSHARC DSP and Parallel ADC\/DAC Architecture\u003c\/h2\u003e\n\u003cp\u003eThe DG-78's most significant internal advance over the DG-68 is the adoption of Analog Devices' SHARC ADSP-21565KSWZ10 DSP, which processes all digital signals natively at up to 384kHz without the intermediate downsampling that the DG-68 required at high sample rates. The SHARC DSP performs all EQ curve calculations in 40-bit floating-point arithmetic, providing sufficient numerical precision to stack multiple complex parametric filter stages without accumulating the rounding errors that fixed-point DSP processing introduces at extreme EQ settings. For the analog-to-digital conversion stage, four AKM AK5578EN 352.8kHz\/32-bit ADC chips operate in parallel per channel, providing four times the conversion paths of a single-chip implementation for statistical noise averaging in the ADC stage that mirrors the MDS++ philosophy applied to the output DAC section. The output conversion matches the DC-500 exactly: eight ES9028PRO chips in parallel per channel with Accuphase's MDS++ architecture and ANCC active noise cancellation, ensuring that the DG-78 in a system with the DC-500 produces a coherent sonic signature across both components from a standardized 2026 Accuphase digital platform.\u003c\/p\u003e\n\n\u003ch2\u003eElectrostatic Touch Panel and Room Correction\u003c\/h2\u003e\n\u003cp\u003eThe DG-78's redesigned user interface centres on a new electrostatic touch panel display with warm-toned illumination for improved visibility, replacing the DG-68's pressure-sensitive resistive panel with a capacitive touch surface that responds accurately to finger contact or the included dedicated stylus pen. Accuphase's decision to use capacitive rather than resistive touch technology reflects the operational requirements of EQ curve setting, where precise point placement on a graphical frequency response curve requires the sub-millimetre accuracy that capacitive touch provides. The three operating modes are fully retained from the DG-68: Voicing mode for manual graphic EQ adjustments to tailor the overall frequency response to personal preference, Equalizer mode for precision parametric correction of room acoustic problems identified by measurement, and Analyser mode using the included measurement microphone and the SHARC DSP's real-time spectrum analysis to characterize the listening room's frequency response before correction. For high-performance two-channel systems in Buffalo, NY where room acoustic problems limit the resolution available from Accuphase amplifiers including the E-5000 integrated or P-7500 power amplifier, the DG-78 provides a precision DSP correction tool with analog signal path quality matching the DC-500's conversion architecture.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrostatic Touch Panel Display:\u003c\/strong\u003e New capacitive touch panel with warm-toned illumination replaces the DG-68's resistive pressure-sensitive panel for accurate, responsive EQ curve setting by finger or included stylus pen.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSHARC ADSP-21565 DSP:\u003c\/strong\u003e Analog Devices ultra-high-speed SHARC processor performs 40-bit floating-point EQ calculations natively at up to 384kHz without downsampling, eliminating the intermediate conversion step required by the DG-68 at high sample rates.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4x AKM AK5578EN ADC per Channel (352.8kHz\/32-bit):\u003c\/strong\u003e Four parallel ADC chips per channel provide statistical noise averaging in the analog-to-digital conversion stage, extending Accuphase's parallel conversion philosophy to the input as well as the output.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8x ESS ES9028PRO DAC per Channel with MDS++ and ANCC:\u003c\/strong\u003e Identical DAC architecture to the DC-500, ensuring consistent sonic character between the two components in a unified Accuphase digital front-end.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThree Operating Modes:\u003c\/strong\u003e Voicing (manual graphic EQ), Equalizer (parametric room correction), and Analyser (real-time spectrum analysis with microphone measurement) in one chassis.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrophone ADC Upgrade:\u003c\/strong\u003e AKM AK5357 microphone ADC provides 1dB improved signal-to-noise ratio compared to the DG-68's equivalent stage for more accurate room measurement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Signal Path:\u003c\/strong\u003e Supports both digital and analog signal paths, making it equally effective in hybrid systems mixing vinyl, CD, and streaming sources.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHS-LINK, Coaxial, and Optical Digital I\/O:\u003c\/strong\u003e Full Accuphase digital bus connectivity alongside standard S\/PDIF interfaces for integration with any digital source.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDSP\u003c\/td\u003e\n\u003ctd\u003eAnalog Devices SHARC ADSP-21565KSWZ10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDSP Processing\u003c\/td\u003e\n\u003ctd\u003e40-bit floating-point, native up to 384kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eADC (per channel)\u003c\/td\u003e\n\u003ctd\u003e4x AKM AK5578EN, 352.8kHz\/32-bit parallel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDAC (per channel)\u003c\/td\u003e\n\u003ctd\u003e8x ESS ES9028PRO parallel, MDS++ with ANCC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrophone ADC\u003c\/td\u003e\n\u003ctd\u003eAKM AK5357 (+1dB SNR vs DG-68)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eElectrostatic capacitive touch panel, warm-toned\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Modes\u003c\/td\u003e\n\u003ctd\u003eVoicing, Equalizer, Analyser\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAnalog Inputs\/Outputs\u003c\/td\u003e\n\u003ctd\u003eBalanced XLR, Unbalanced RCA (LINE)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDigital Inputs\/Outputs\u003c\/td\u003e\n\u003ctd\u003eHS-LINK, Coaxial, Optical\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHS-LINK (Ver.1)\u003c\/td\u003e\n\u003ctd\u003e192kHz\/24-bit PCM, 2.822MHz\/1-bit DSD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHS-LINK (Ver.2)\u003c\/td\u003e\n\u003ctd\u003e384kHz\/32-bit PCM, 5.6448MHz\/1-bit DSD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCoaxial\u003c\/td\u003e\n\u003ctd\u003e192kHz\/24-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOptical\u003c\/td\u003e\n\u003ctd\u003e96kHz\/24-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e465mm W x 161mm H x 396mm D\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e15.0kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAvailability\u003c\/td\u003e\n\u003ctd\u003eStock expected June 2026\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the Accuphase DG-78?\u003c\/h3\u003e\n\u003cp\u003eThe Accuphase DG-78 is a high-end digital voicing equalizer, room correction processor, and real-time spectrum analyzer from Accuphase of Japan, available at Vinyl Sound Buffalo. It succeeds the DG-68 with a new electrostatic touch panel, Analog Devices SHARC DSP processing at up to 384kHz natively, four parallel AKM AK5578EN ADC chips and eight parallel ESS ES9028PRO DAC chips per channel with ANCC, and an improved microphone ADC. It operates in Voicing, Equalizer, and Analyser modes for manual EQ, parametric room correction, and real-time acoustic measurement.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the DG-78 compare to the DG-68?\u003c\/h3\u003e\n\u003cp\u003eThe Accuphase DG-78 advances over the DG-68 in four key areas. First, the electrostatic touch panel replaces the pressure-sensitive resistive display for more accurate and responsive operation. Second, the SHARC ADSP-21565 DSP enables native 384kHz processing without the intermediate downsampling the DG-68 required. Third, the ADC section uses four parallel AKM AK5578EN chips per channel rather than the DG-68's single-chip approach, applying the same parallel averaging philosophy to the input stage. Fourth, the microphone ADC provides 1dB improved signal-to-noise ratio for more accurate room measurement. The DAC output architecture mirrors the DC-500 with eight ES9028PRO chips and ANCC, identical in topology to the DC-500.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between Voicing, Equalizer, and Analyser modes?\u003c\/h3\u003e\n\u003cp\u003eVoicing mode provides a graphic equalizer interface for manually adjusting the frequency response of the system according to personal preference, useful for compensating the tonal character of specific speakers or rooms without acoustic measurement. Equalizer mode is a precision parametric correction tool designed to address specific room acoustic problems identified by measurement, allowing narrow-band cuts and boosts at exact frequencies with adjustable bandwidth. Analyser mode uses the included measurement microphone and the SHARC DSP's real-time Fast Fourier Transform analysis to display the actual frequency response of the listening room, providing the measurement data needed to configure Equalizer mode corrections accurately.\u003c\/p\u003e\n\n\u003ch3\u003eCan the DG-78 be used with analog sources such as a turntable?\u003c\/h3\u003e\n\u003cp\u003eYes, the Accuphase DG-78 supports both digital and analog signal paths. It accepts analog line-level inputs on both balanced XLR and unbalanced RCA connections, converting them through the four parallel AKM AK5578EN ADC chips per channel, processing them through the SHARC DSP's EQ and room correction stages, then converting back to analog via the eight parallel ES9028PRO DAC chips. This makes the DG-78 equally effective with vinyl sources through a phono stage, CD players, and streaming DACs. For Accuphase systems with HS-LINK connectivity, the DG-78 can be integrated at the digital level between source and DAC without additional A\/D and D\/A conversion stages.\u003c\/p\u003e\n\n\u003ch3\u003eIs the DG-78 compatible with Accuphase amplifiers and the DC-500?\u003c\/h3\u003e\n\u003cp\u003eYes, the DG-78 is designed for direct integration into an Accuphase system. Its HS-LINK digital bus connects to other Accuphase digital components including the DC-500, and its balanced XLR outputs connect to Accuphase preamplifiers including the C-2300 and C-3900 or direct to integrated amplifiers including the E-5000. The shared eight-parallel ES9028PRO DAC and ANCC architecture with the DC-500 ensures a consistent tonal signature when both are used together, a deliberate design choice by Accuphase to standardize the sonic character of the 2026 digital lineup.\u003c\/p\u003e\n\n\u003ch3\u003eWhere can I buy the Accuphase DG-78 in Buffalo, NY?\u003c\/h3\u003e\n\u003cp\u003eThe Accuphase DG-78 Digital Voicing Equalizer is available at Vinyl Sound USA Inc. in Buffalo, NY, your authorised Accuphase dealer serving Western New York and the United States. Stock is expected June 2026. Visit vinylsound.com or contact the Buffalo store for pre-order availability, expert system matching guidance, and advice on integrating the DG-78 with your Accuphase components.\u003c\/p\u003e","brand":"Accuphase","offers":[{"title":"Default Title","offer_id":53508582670643,"sku":null,"price":18975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/0293\/0739\/files\/AccuphaseDG-78DigitalGraphicEqualizer_2.png?v=1781714545","url":"https:\/\/vinylsound.com\/products\/accuphase-dg-78-digital-graphic-equalizer","provider":"Vinyl Sound USA","version":"1.0","type":"link"}