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Pro-Ject MC Step Up Box S3 Step-up Transformer

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Original price $749.00 - Original price $749.00
Original price
$749.00 - $749.00
Current price $749.00

Pro-Ject MC Step Up Box S3 Step-up Transformer

The output level of Moving Coil (MC) cartridges is significantly lower than that of Moving Magnet (MM) cartridges, being approximately 10 times lower. Consequently, a special phono amplifier is required to utilize the signals effectively. This higher gain, however, can lead to increased noise levels and distortion. The MC Step Up Box S3 offers a solution to this issue.

Lively, dynamic & natural

The MC Step Up Box S3 operates distinctly from a phono preamplifier, with its gain factor determined by the transformer's windings ratio. Functioning entirely passively, it requires no external power. Voltage increase is accomplished through a corresponding decrease in current. Since there is no amplification involved, the MC Step Up Box S3 boasts exceptional noise performance and minimal distortion. The resulting sound from using a Step-Up Transformer is more lively, dynamic, and natural.


Gold Plated

Premium RCA terminals

Gold plated in- and output RCA terminals for optimum signal transmission.


Solid full aluminium housing

Due to the timeless design & rigid aluminium casework, the MC Step Up Box S3 is built for eternity.


Cartridge impedance setting

Cartridge impedance matching button on the back. Two different settings available: 10-40Ω & 40-150Ω


  • Frequency response 10Hz - 55kHz: +/- 1dB
  • Gain at 10-40 Ohm: 21dB at 1kHz
  • Gain at 40-150 Ohm: 24dB at 1kHz
  • Recommended load: 47 kOhm / 100pF
  • Input MC:1x pair RCA phono sockets
  • Output: 1x pair RCA phono sockets
  • Dimensions WxHxD: 206 x 65 x 153 (164 with sockets) mm
  • Weight: 940g

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