Audio Research I/70 integrated amp

The I/70 integrated amp has independent tube preamplifier and tube amplifier sections, providing flexibility with a set of stereo preamplifier outputs. While we suspect very few listeners will pair it with an external power amp, many will need this feature to feed powered subwoofers that offer only low-level inputs.

อุปกรณ์เสริม (Optional Card):
• DAC Card: 35,000 บาท
• Phono Card: 35,000 บาท
โดย ซื้อคู่ ราคาพิเศษ 60,000 บาท แจ้งเพิ่มหลังจากสั่ง I/70 ตัวหลักแล้ว ***
 
The active preamplifier section offers a wide range of gain settings, now with a 75-step volume control. This is especially helpful with recordings that are cut at a low gain setting for wide dynamic range.
 
The headphone output is driven by the KT120 output tubes. It was designed for high quality headphones, able to provide the best possible personal listening experience.

The DAC card’s AKM Velvet Sound DAC chip provides high resolution formats over USB, Optical, Coax, and Bluetooth. All are upsampled. The result is fine resolution, great transparency, and tonal purity that is rarely heard outside of the finest separate DACs.
 
There are three sets of single-ended inputs and one set of Balanced XLR inputs. The optional phono card has both MC and MM gain settings, controlled via the I/70 remote.  MC loading is also adjustable, from 50 to 1k ohms.
 
The I/70 delivers the punch, detail and musicality that evoke the performance of our larger separates. It continues the Audio Research heritage, built by hand in our Minnesota facility, twice tested, and individually auditioned in our reference system.

TECHNICAL SPECIFICATIONS
 
 
Power Output
70 watts continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% per channel, below 0.1% at 1 watt (Note that actual power output is dependent upon both line voltage and “condition” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not critical).
Power Bandwidth

 (-3dB points) 10Hz to 22kHz
Frequency Response

 (-3dB points at 1 watt) 7Hz to 30kHz
Input Sensitivity
1.25V RMS for rated output
Input Impedance

 
100K ohms Balanced, 48K ohms Single Ended

 
Output Polarity

 
Non-inverting. Balanced input pin 2+ (IEC-268)
Inputs
8 Inputs – 4 balanced, 4 single-ended
Output Taps
8 ohms, 4 ohms
Power Requirements
105-130VAC 60Hz (210-250VAC 50Hz)

420 watts at rated output, 220 watts at “idle.”
Tube Required
2 matched pair KT120; 3-6922 (1 input, 2 driver)
Dimensions
Width 16.5” (42 cm)

Height 8.25” (21 cm)

Depth 13.5” (34 cm)

Weight: 55 lbs (25 kg); 66 lbs (30 kg) shipping weight