Integrated amplifiers — Audio Research I/55
Description, images, technical data and specifications
Audio Research I/55
Image source — © Audio Research
A significant step forward has also been made in the preamplifier stage. The Audio Research I/55 features a tube preamp section with a noticeably wider gain range than its predecessor. This simplifies playback of quietly recorded material and provides greater dynamic headroom in everyday use. Despite the same nominal power rating of 50 watts per channel, the Audio Research I/55 subjectively delivers greater drive and control, particularly with more demanding loudspeakers. In addition, preamplifier outputs (Pre-Out) are provided for connecting external power amplifiers or active subwoofers.
Specifications
Model name
I/55
Type
tube integrated amplifier
Analog inputs (balanced)
4
Analog inputs (single-ended)
4
Input sensitivity (mV)
1.25
Input impedance (balanced) (Ω)
100000
Input impedance (single-ended) (Ω)
48000 - 50000
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
D/A conversion
Yes
Phono MM/MC current-sensing input impedance (Ω)
N/A
Output power (8Ω) (W)
2 x 50
Output power (4Ω) (W)
N/A
Gain (dBu)
N/A
Frequency response low +/- 3dB (Hz)
7
Frequency response high +/- 3dB (Hz)
30000
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (%)
1
Damping factor
N/A
Dimensions (mm)
420 x 180 x 340
Weight (kg)
18.1
Official link
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