The io uses the same power amplifier and phono stage as its larger brother, the multi-award winning Brio. The io aims to deliver exceptional sound quality in a smaller and more cost effective package. The class A/B circuit shares its DNA with the rest of Rega’s amplifiers, and as usual, great care has been taken in component selection. Sanken output transistors and an Alps volume potentiometer and a linear power supply that enables an output of 30 watts per channel into 8 ohms.
Two line level inputs and a high quality moving magnet phono input are available as sources. There is a headphone output provided on the front of the unit for powering standard hi-fi headphones; this is driven from the power amplifier stage of the unit through relays to avoid signal degradation when headphones are inserted or the product is muted. A new remote handset is included as well.
Power outputs at 230/115 V supply voltage
30 W RMS both channels driven into the rated load of 8 Ω
Input 1 (Phono) input sensitivity 2.1 mV @ 47 kΩ in parallel with 220 pF
Maximum input 1 (Phono) input level 100 mV
Input 2-3 (Line) input sensitivity 210 mV @ 47 kΩ
Maximum input 2-3 (Line) input level 10.25 V
Headphone output
No load 8 V
32 Ω 1.6 V
54 Ω 2.4 V
300 Ω 5.7 V
Source impedance: 109 Ω
Power consumption
135 W @ 230 V / 220 V / 115 V / 100 V into the rated load of 8 Ω
Frequency response
Phono: 15 Hz to 40 kHz (-3 dB points) / 27 Hz to 20.5 kHz (-1 dB points)
RIAA accuracy: (100Hz to 10 kHz) ±0.4 dB typically better than ±0.3 dB
Line: 12 Hz (-1 dB points) to 43 kHz (-3 dB points)
