Phonostages — Trafomatic Audio Evolution Phono One

Name: Evolution Phono One
Brand: Trafomatic Audio
Rating: 100 (1 reviews)

Description, images, technical data and specifications

Trafomatic Audio Evolution Phono One
Image source — © Trafomatic Audio

Trafomatic Audio Evolution Phono One is a phono corrector with a gain of 40 dB (MM), 64 dB (MC), separate inputs for MM and MC type heads, adjustable input impedance for MC pickups (10, 20, 50, 100 ohms) and an input impedance of 47 kOhm for MM type heads. For MM/MC type pickups. This model is designed using Burr-Brown OPA2134 operational amplifiers (two per channel), which provide music playback via an analog output.

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Specifications

Model name
Evolution Phono One
Inputs (balanced)
N/A
Inputs (single-ended)
2
MC current-sensing input impedance (Ω)
10, 20, 50, 100 (MC) + 47 000 (MM)
MM/MC voltage input impedance (Ω)
N/A
Output impedance (Ω)
600
Gain (dB)
MM – 40, MC – 64
Playback EQ curves accuracy (dB)
N/A
Frequency response low +/- 3dB (Hz)
N/A
Frequency response high +/- 3dB (Hz)
N/A
Total Harmonic Distortion + Noise (%)
N/A
Dimensions (mm)
450 x 320 x 100
Weight (kg)
6
Official link
https://www.trafomaticaudio.com/products/evolution-phono-one/?portfolioCats=14

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The circuit uses four C3GSE triode lamps, two interstage and two output transformers, and an LL1941 step-up transformer for the MC input. The power supply is external, with a toroidal power transformer with small scattering fields and a smoothing filter based on chokes and electrolytic capacitors Mundorf MLytic HV.