i70

Audio Research I/70 – High-Performance Integrated Tube Amplifier

At Son Ultime, the Audio Research I/70 represents a serious entry point into the world of tube amplification, without compromising on the fundamentals that define the brand's signature: transparency, coherence, and musicality.

Designed as a modern integrated amplifier, the I/70 combines a preamplifier section and tube amplification in a compact architecture, while maintaining dynamic capability and stability suitable for demanding high-fidelity systems.

Architecture and Topology

The I/70 is based on an all-tube architecture for the signal path, coupled with a design optimized for simplicity and performance.

• All-tube architecture for the signal path
• Optimized Class AB operation
• High-capacity KT120 output tubes
• Integrated preamplifier section
• Low-noise regulated power supply
• Optimized signal path for coherence

This design delivers smooth, stable, and energetic musical reproduction while maintaining the Audio Research signature.

Observed Sound Behavior at Son Ultime

In our demonstration systems, the I/70 demonstrates a particularly interesting balance between accessibility and performance.

• Rich and natural harmonic texture
• Stable and well-defined soundstage
• Controlled and articulate bass
• Good dynamic capability for an integrated amplifier
• No harshness in the upper frequencies
• Great overall coherence

It allows for building a musical and engaging system without requiring a complete separate architecture.

Technical Specifications

System Integration According to the Son Ultime Approach

The I/70 is designed to operate within coherent and optimized systems. At Son Ultime, we recommend it in configurations including:

• HifiRose or MSB Technology digital sources
• Silent Angel network infrastructure
• Bowers & Wilkins speakers
• Acora Acoustics speakers
• REL Acoustics subwoofers for bass extension
• Shunyata Research cabling and power

The goal is to maintain an overall balance between musicality and precision, even in an integrated setup.

Positioning in the Audio Research Range

The I/70 stands out as an integrated solution, offering a simplified alternative to separate systems, while retaining the essential qualities of the brand.

It provides an excellent foundation for an evolving system, potentially allowing for migration to separate configurations.

Son Ultime Approach

At Son Ultime, even an integrated amplifier is considered within a global perspective. We analyze:

• The choice of speakers
• The acoustic environment
• The quality of the electrical power supply
• The digital source
• The overall system balance

This approach allows for fully exploiting the capabilities of the I/70 and ensuring consistent and lasting performance.

Schedule a listening session at Son Ultime to discover the Audio Research I/70 in an optimized and calibrated system.