Audiozen IO
MM phono stage
IO is the solid state MM phono stage manufactured by Audiozen with selected FETs and separate power supply unit
Audiozen IO
is the evolution of
phono preamplifier
IO is the evolution of Mantra, Audiozen’ first phono stage designed and manufactured in 2009.
During these years Audiozen improved it just in details and now Mantra becomes IO.
Audiozen IO is the solid state phono stage for moving magnet (MM) cartridges: it is equipped with FETs (field effect transistors), devices with high-class features like high input impedance, extended bandwidth, very low background noise, excellent tonal balance, very close to the warmth of tubes.
The FETs are selected and matched in pairs to obtain the same characteristics for both audio channels.
Audio signal is decoupled by fine Jantzen Standard Z-Cap series polypropylene capacitors specific for audio use.
The RIAA network has been calculated according to the parameters of the AES (Audio Engineering Society), the input impedance of IO is 47 KΩ.
Not a cheap plug in transformer, but a separate power supply unit equipped with a toroidal transformer and the electronic voltage regulator circuit, equipped with large capacity capacitors. Connection between the power supply stage and the phono preamplifier is provided by connectors that can handle much higher current than that required by IO.
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The care taken in designing and manufacturing this phono stage, like the all-aluminum cabinets, Jantzen polypropylene capacitors, excellent RCA connectors, separate power supply unit, made IO the real evolution of Audiozen solid state phono preamplifier: you can play your favourite records enjoying great transparency, dynamics and detail.
Audiozen IO
MM phono preamplifier-
Semicondustors: 6 x FETs
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Input impedance: 47 KΩ
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Input capacity: 100 pF
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Gain: 40 dB
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Output impedance: < 800 Ω
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Audio capacitors: 4 x Jantzen Standard Z-Cap
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Toroidal transformer: 1 x 12 VA
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Available finishes: silver & black
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Main unit dimensions and weight: 92x54x170mm (WxHxD) – 450 g.
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PSU dimensions and weight: 92x54x175mm (WxHxD) – 730 g.