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Rothwell Mc1 Moving Coil | Step-Up Transformer | Audio Emotion

Product Description

The MC1 is a step-up transformer designed to raise the output of moving coil cartridges up to a level compatible with moving magnet phonostages. The purpose is not simply to allow moving coil cartridges to be used with moving magnet only phonostages (which most valve designs are, for example), but to allow moving coil cartridges the chance to realise their full potential. Transformers have much more benign distortion characteristics than active circuits and they are capable of producing a truly sublime soundstage with detail and separation unsurpassed by the more common transistor and op-amp alternatives. Don't be misled that transformers are an audio anachronism long since made obsolete by the wonders of modern solid state technology - they're not. The reason that they are so rarely seen nowadays is that transformers are incredibly expensive compared to transistors and chips. A complete moving coil compatible phonostage is obviously more convenient than a separate transformer and moving magnet phonostage, and a moving coil phonostage made entirely with solid state circuitry is considerably cheaper to produce than one with transformers, hence the rarity of moving coil step-up transformers. This is shame because many audiophiles have never even heard a transformer coupled moving coil cartridge and don't know how good it can sound.

The MC1 is a fine example of a step-up transformer designed specifically for modern low output moving coil cartridges and optimised for use into moving magnet phonostage inputs. It features wide bandwidth, low distortion and carefully designed primary and secondary loading networks to optimise the performance and give beautifully reproduced transients, free from ringing. The step-up ratio and impedance make it compatible with a wide range of cartridges and effective screening against external magnetic fields minimises hum pickup from other equipment.

Step-up transformers explained
Although the MC1 is compatible with most moving coil cartridges available today from makers such as Lyra, Koetsu, Ortofon, Audio Technica etc., anyone confused by the whole topic of impedances, transformer ratios and matching can read moving coil step-up transformers explained for detailed information on the subject, along with example calculations and a useful table of cartridge data for guidance in assessing compatibility.

Specifications
  • turns ratio: 1:12.9
  • voltage gain: 22dB (x12.9)
  • input impedance: 100 ohms
  • optimum load impedance: 47k + 150pF
  • bandwidth: 5Hz - 36kHz (+0/-3dB)
  • cartridge compatibility (o/p): 0.3mV - 0.7mV
  • cartridge compatibility (imp.): internal impedance <20 ohms
  • dimensions: 60 x 155 x 92 mm
  • weight: 580g

Specifications

Brand
Rothwell
Condition
New

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The MC1 is a step-up transformer designed to raise the output of moving coil cartridges up to a level compatible with moving magnet phonostages. The purpose is not simply to allow moving coil cartridges to be used with moving magnet only phonostages (which most valve designs are, for example), but to allow moving coil cartridges the chance to realise their full potential. Transformers have much more benign distortion characteristics than active circuits and they are capable of producing a truly sublime soundstage with detail and separation unsurpassed by the more common transistor and op-amp alternatives. Don't be misled that transformers are an audio anachronism long since made obsolete by the wonders of modern solid state technology - they're not. The reason that they are so rarely seen nowadays is that transformers are incredibly expensive compared to transistors and chips. A complete moving coil compatible phonostage is obviously more convenient than a separate transformer and moving magnet phonostage, and a moving coil phonostage made entirely with solid state circuitry is considerably cheaper to produce than one with transformers, hence the rarity of moving coil step-up transformers. This is shame because many audiophiles have never even heard a transformer coupled moving coil cartridge and don't know how good it can sound.

The MC1 is a fine example of a step-up transformer designed specifically for modern low output moving coil cartridges and optimised for use into moving magnet phonostage inputs. It features wide bandwidth, low distortion and carefully designed primary and secondary loading networks to optimise the performance and give beautifully reproduced transients, free from ringing. The step-up ratio and impedance make it compatible with a wide range of cartridges and effective screening against external magnetic fields minimises hum pickup from other equipment.

Step-up transformers explained
Although the MC1 is compatible with most moving coil cartridges available today from makers such as Lyra, Koetsu, Ortofon, Audio Technica etc., anyone confused by the whole topic of impedances, transformer ratios and matching can read moving coil step-up transformers explained for detailed information on the subject, along with example calculations and a useful table of cartridge data for guidance in assessing compatibility.

Specifications
  • turns ratio: 1:12.9
  • voltage gain: 22dB (x12.9)
  • input impedance: 100 ohms
  • optimum load impedance: 47k + 150pF
  • bandwidth: 5Hz - 36kHz (+0/-3dB)
  • cartridge compatibility (o/p): 0.3mV - 0.7mV
  • cartridge compatibility (imp.): internal impedance <20 ohms
  • dimensions: 60 x 155 x 92 mm
  • weight: 580g
No reviews left yet
Write A Review

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About us

Rothwell hi-fi dates back to 1989 when our first valve products were designed. The 1970's saw hi-fi move almost completely to transistor designs and valves became just a distant memory, but our first experiments with a valve phono stage were proof positive that valves had huge advantages. Our current catalogue covers valve, transistor and passive devices, all designed and manufactured in the UK to exacting standards.

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Rothwell MC1 Moving Coil Step-Up Transformer

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