Merging Technologies ADO8V3P – 8-Channel Mic/Line AD Card with Direct Outs for HAPI MKIII (DXD/DSD256)

OVERVIEW

The Merging Technologies ADO8V3P is the flagship analogue input expansion card for the HAPI MKIII, delivering eight channels of world-class microphone and line-level analogue-to-digital conversion with support for PCM up to 384kHz, DXD and DSD256 recording formats. Built around Merging’s renowned third-generation Dual Gain microphone preamp architecture – derived from the acclaimed ANUBIS preamps – it provides outstanding transparency, ultra-low noise and exceptional headroom for professional recording, mastering, broadcast, classical music production and immersive audio workflows.

Each of the eight channels features a precision Swiss-designed microphone preamp with up to 78dB of gain, individually switchable phantom power, polarity inversion, low-cut filtering and selectable input impedance, all fully controllable remotely. The addition of eight post-preamp analogue direct outputs makes the ADO8V3P ideal for simultaneously feeding analogue consoles, monitor systems or external processing equipment without requiring additional microphone splitters or DI boxes. Every Premium card is individually measured to ensure the highest specifications and the tightest manufacturing tolerances for critical recording environments.

Designed specifically for engineers who demand the absolute highest recording quality, the ADO8V3P combines exceptional analogue circuitry, reference-grade conversion and comprehensive remote control into one of the most advanced modular microphone input cards available for the HAPI MKIII platform.

KEY HIGHLIGHTS

Premium DXD & DSD256 Recording

Supports PCM sample rates up to 384kHz, DXD recording at 352.8kHz, and native DSD64, DSD128 and DSD256, making it ideal for high-resolution recording and mastering applications.

Third-Generation Swiss Microphone Preamps

Eight exceptionally transparent Dual Gain microphone preamps deliver remarkable clarity, extremely low noise and up to 78dB of gain for virtually any microphone source.

Integrated Direct Analogue Outputs

Each channel provides its own post-preamp analogue direct output, allowing simultaneous recording, monitoring or routing to external analogue hardware without additional splitters.

Complete Remote Control

Gain, phantom power, polarity inversion, impedance selection and low-cut filters can all be adjusted remotely on a per-channel basis for streamlined professional workflows.

Built for HAPI MKIII

Purpose-designed for the Merging Technologies HAPI MKIII modular audio interface, providing seamless expansion with reference-quality analogue performance.

FEATURES

• Premium 8-channel Mic/Line analogue-to-digital input card for the Merging Technologies HAPI MKIII
• Supports PCM sample rates up to 384kHz, DXD (352.8kHz) and native DSD64, DSD128 and DSD256
• Eight exceptionally transparent Swiss-designed third-generation Dual Gain microphone preamps
• Up to 78dB of microphone gain with Boost mode
• Eight post-microphone preamp analogue direct outputs
• Individually switchable +48V phantom power on every channel
• Per-channel polarity inversion
• Per-channel selectable input impedance
• Per-channel low-cut filter
• Remote or local switching between microphone and line-level operation
• Fully remote controllable from compatible Merging software
• Outstanding dynamic range of up to 139dB (A-weighted) referenced to +24dBu
• Extremely low distortion and ultra-low equivalent input noise
• Auto-mute circuitry eliminates pops during power cycling
• Dual DB25 (AES59/Tascam) connectors for analogue inputs and direct outputs
• Removes the need for external DI boxes in many recording applications
• Ideal for recording, mastering, broadcast, classical music, post-production and immersive audio
• Individually measured and calibrated Premium card for the highest specifications and manufacturing tolerances.

TECHNICAL SPECS

General

Product Type: 8-Channel Mic/Line Analogue-to-Digital Expansion Card

Compatibility: Merging Technologies HAPI MKIII

Conversion: Analogue to Digital (A/D)

Supported Formats:

• PCM: 44.1kHz–384kHz
• DXD: 352.8kHz
• DSD64, DSD128, DSD256

Direct Outputs: 8 x Post-Mic Pre Analogue Outputs

Connectors: 2 × 25-pin Sub-D (AES59/Tascam)

Microphone Inputs

Channels: 8

Microphone Preamps: Swiss-designed 3rd Generation Dual Gain topology

Gain Range: 0dB to +66dB

Boost Gain: Up to +78dB

Gain Resolution: 0.5dB

Gain Accuracy: ±0.2dB

Phantom Power: +48V, switchable per channel

Polarity Reverse: Yes, per channel

Low-Cut Filter: 80Hz, -12dB/octave, switchable per channel

Selectable Input Impedance: Yes

Remote/Local Line Switching: Per channel

Audio Performance

Dynamic Range (Flat, 20Hz–20kHz): >134dB

Dynamic Range (A-weighted): 136–137dB typical

Dynamic Range (Referenced to +24dBu): 139dB (A-weighted)

Frequency Response: 5.7Hz–42.1kHz (+0/-0.1dB @ 192kHz)

THD+N: Better than -110dB (0.00031%)

EIN: -128dBu (A-weighted, typical)

Common Mode Rejection: >75dB

Interchannel Crosstalk:

• < -130dB @1kHz
• < -105dB (20Hz–20kHz)

Direct Outputs

Quantity: 8

Type: Post-Microphone Preamp Line Outputs

Maximum Output Level: +24dBu

Output Impedance: <100Ω

Connectivity

Analogue Inputs: 8 x Mic/Line via DB25 (AES59/Tascam)

Direct Outputs: 8 x Analogue via DB25 (AES59/Tascam)

Additional Features

Fully remote parameter control

Supports analogue microphone splitting workflows

Eliminates the need for external DI boxes in many applications

Auto-mute circuitry for silent power cycling

Premium version individually measured for the highest specifications and smallest manufacturing tolerances

Designed specifically for professional recording, mastering, broadcast, post-production and immersive audio environments.