Accuphase DG-78 Digital Voicing Equalizer at Vinyl Sound Buffalo, NY USA

The 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 electrostatic touch panel display replacing the previous pressure-sensitive interface, an ultra-high-speed Analog Devices SHARC ADSP-21565 DSP enabling native 384kHz processing without downsampling, four parallel AKM AK5578EN 352.8kHz/32-bit ADC channels per channel, and the same eight ESS ES9028PRO DAC chips in parallel with ANCC as the DC-500 processor, arriving mid-2026 at Vinyl Sound Buffalo, NY USA.

SHARC DSP and Parallel ADC/DAC Architecture

The 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.

Electrostatic Touch Panel and Room Correction

The 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.

Key Features

• Electrostatic Touch Panel Display: 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.
• SHARC ADSP-21565 DSP: 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.
• 4x AKM AK5578EN ADC per Channel (352.8kHz/32-bit): 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.
• 8x ESS ES9028PRO DAC per Channel with MDS++ and ANCC: Identical DAC architecture to the DC-500, ensuring consistent sonic character between the two components in a unified Accuphase digital front-end.
• Three Operating Modes: Voicing (manual graphic EQ), Equalizer (parametric room correction), and Analyser (real-time spectrum analysis with microphone measurement) in one chassis.
• Microphone ADC Upgrade: AKM AK5357 microphone ADC provides 1dB improved signal-to-noise ratio compared to the DG-68's equivalent stage for more accurate room measurement.
• Dual Signal Path: Supports both digital and analog signal paths, making it equally effective in hybrid systems mixing vinyl, CD, and streaming sources.
• HS-LINK, Coaxial, and Optical Digital I/O: Full Accuphase digital bus connectivity alongside standard S/PDIF interfaces for integration with any digital source.

Technical Specifications

Frequently Asked Questions

What is the Accuphase DG-78?

The 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.

How does the DG-78 compare to the DG-68?

The 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.

What is the difference between Voicing, Equalizer, and Analyser modes?

Voicing 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.

Can the DG-78 be used with analog sources such as a turntable?

Yes, 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.

Is the DG-78 compatible with Accuphase amplifiers and the DC-500?

Yes, 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.

Where can I buy the Accuphase DG-78 in Buffalo, NY?

The 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.