Audio Research I/70 Integrated Amplifier

The I/70 is Audio Research's larger current integrated amplifier, styled after the flagship Reference 330M with machined aluminum and mesh panels, and uses the same output transformer as Audio Research's Reference 75.

It runs four KT120 output tubes with proprietary auto-bias, pairs independent tube preamp and power amp sections with external sub and power-amp outputs, and includes an AKM Velvet Sound DAC chip with USB, optical, coaxial, and Bluetooth inputs.

An optional phono card with MM and MC settings is available, and the headphone output is driven directly from the KT120 output tubes.

Specifications

• Power: 70W per channel continuous (20Hz to 20kHz), 1% THD at 1kHz, under 0.1% THD at 1W
• Tubes: two matched pairs KT120 output, three 6922 (one input, two driver)
• Inputs: 1 balanced XLR plus 3 single-ended RCA
• Outputs: 8/4 ohm taps, subwoofer pre-out
• Optional phono card: MC and MM gain settings, MC loading adjustable 50 to 1000 ohms
• Headphone output: yes, driven directly off the KT120 output tubes
• Dimensions: 16.5 in W x 8.25 in H x 13.5 in D
• Weight: 55 lbs