Audio Research I/50

7490 €

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I/50 combines sublime performance and simplicity while accommodating a variety of musical sources in a single elegant package. Hand-crafted in Minnesota, the I/50 is built with the same attention to detail as all other Audio Research products – each one is bench-tested twice and gets its own listening test with sound engineer Warren Gehl.

The foundation is an all-tube amplification circuit using two matched sets of 6550 power tubes, fed by 6922 input tubes. The traditional combination of power and grace for which Audio Research is renowned is instantly recognizable even in this compact model. Challenge the I/50 and be surprised by its depth of bass and dynamic expression. Two LexieTubes® provide display information for input selection and volume.

Three single-ended inputs and one XLR input provide connectivity for your analog components, along with 4 and 8 Ohm speaker taps to accommodate your speaker of choice. One input can even be assigned for pass-through function. A full-function metal remote control provides further convenience and ease. An optional tube cage is available.

Optional DAC and Phono modules round out your ability to include all your favorite recordings and listening styles. The AKM Velvet Sound DAC chip facilitates high resolution formats over USB, Optical, Coax, and even upsampling Bluetooth. Combined with the I/50’s output stage, the result is finely graded resolution, but also authenticity of tone and purity that is rarely heard outside of the finest reference gear. The I/50 has earned high acclaim for its ability to communicate musical intent and flow at a reasonable price and do so with a wide variety of partnering loudspeaker brands.

The optional Phono module offers 42dB of gain to support Moving Magnet and a generous array of quality High Output Moving Coil cartridges to help you build a high-performance analog system with I/50 as the heart.

The ability of the I/50 to reconstruct a musical experience will thrill and excite all who hear it. The I/50 is a fully integrated product while providing true Audio Research performance and sound quality.

SPECIFICATIONS

Power output	2 × 50 W continuous into 8 Ω / 4 Ω (20 Hz–20 kHz)
Power bandwidth	–3 dB at 10 Hz – 22 kHz
Frequency response (‑3 dB)	7 Hz – 30 kHz (at 1 W)
THD	Typically 1% per channel at 1 kHz · < 0.1% at 1 W
Input sensitivity	1.25 V RMS for rated output
Input impedance	100 kΩ (balanced) · 48 kΩ (single‑ended)
Inputs	3 × RCA single‑ended · 1 × XLR balanced (one input can be assigned pass‑through)
Optional modules	Phono module (MM/High‑Output MC) · DAC module (USB/optical/coax/Bluetooth)
Output taps	Speaker taps for 4 Ω and 8 Ω
Headphone output	Yes (front panel)
Tube complement	2 paired 6550WE power tubes per channel · 3 × 6922 (1 input, 2 driver)
Display	LexieTubes® for volume and input selection information
Remote control	Full‑function metal remote included
Power requirements	105–130 VAC 60 Hz / 210–250 VAC 50 Hz · ~252 W at rated output
Dimensions (W × H × D)	420 × 180 × 340 mm (16.5″ × 7.25″ × 13.5″)
Net weight	18.1 kg (40 lbs) · Shipping: 23.1 kg (51 lbs)
Finish options	Black anodized chassis with optional Cerakote colors