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ST-70 Moving Coil Step-Up Transformer

by Ortofon
$1,846.99
MAP

ST-70

The Ortofon ST-70 MC transformer

The Ortofon ST-70 is reserved for discerning audiophiles and music lovers. The ST-70 combines the fine components, along with world-class engineering, for unparalleled sound reproduction.

Starting with high quality Lundahl™ transformers, surrounded by a specialized mu-metal shielding, listeners can be assured that every detail in a complex array of notes is reproduced with utter purity, with freedom from internal and external sources of interference. These two items combined make the ST-70 transformer one of the quietest, most revealing transformers.

Accurate tonal balance
One of the quietest, most revealing transformers

Starting with high quality Lundahl™ transformers, surrounded by a specialized mu-metal shielding, listeners can be assured that every detail in a complex array of notes is reproduced with utter purity, with freedom from internal and external sources of interference. These two items combined make the ST-70 transformer one of the quietest, most revealing transformers.

Featuring dual mono design, the ST-70 provides discrete circuitry for each channel, resulting in the elimination of crosstalk and possible distortions. This results in cleaner, clearer reproduction with substantially increased stereo imaging. Regardless of the composition being played, the ST-70 expansive stereo separation provides lifelike realism and accurate tonal balance devoid of coloration.

Terminal connections
To further minimize signal degradation and maximize signal flow, the ST-70 has been engineered using high quality industrial grade PCB.  Additionally, gold-plated RCA jacks with Teflon insulation provide optimal conductivity for use with high quality interconnects. Internally, the unit is assembled with an absolute bare minimum of internal wiring, preserving absolute signal integrity. 

1. Output terminal for Right channel RCA plug
2. Input terminal for Right channel RCA plug
3. Grand earth terminal
4. Output terminal for Left channel RCA plug
5. Input terminal for Left channel RCA plug
A perfect partner for the Cadenza Series

The ST-70 applications
The ST-70 maintains compatibility with most Moving Coil cartridges by using internal jumpers to select between two gain/impedance options. This affords audiophiles with broad flexibility while still maintaining a clean aesthetic.

The ST-70 transformer is a perfect partner for the Cadenza Series. Why use a transformer? Since the output of MC cartridges is low, higher gain is required to utilize it, such as that provided by Step-up moving coil transformers or MC phono preamplifiers. Although both devices provide this requirement, both are fundamentally different in function and in sonic character. This is where Step-up moving coil transformers are frequently seen as superior; they are completely passive and offer exceptional noise performance and sound quality.

Technical data Configuration A:

  • Recommended cartridge impedance: 5-50 Ω
  • Gain: 24 dB at 1 kHz
  • Frequency response: 10 Hz - 100 kHz ± 1 dB
  • Recommended load: 47 KΩ // 200 pF
  • Dimensions: 58 mm(W) x 135 mm(H) x 150 mm(D)
  • Weight: 1.233 kg

Technical data Configuration B:

  • Recommended cartridge impedance: < 10 Ω
  • Gain: 30 dB at 1 kHz
  • Frequency response: 10 Hz - 80 kHz ± 1 dB
  • Gain and frequency response at recommended load:  47 kΩ / 200 pF

Ortofon-branded products are warranted against defects in materials and workmanship for a period of 2 years from the date of original retail purchase when used in accordance with Ortofon’s user manuals. If a defect arises during the warranty period, Ortofon, at its option will (1) repair the product at no charge or (2) exchange the product with one of equivalent functionality or one that is at least functionally equivalent to the product it replaces. This warranty excludes damage resulting from abuse, accident, modifications, unauthorized repairs, improper installation, or other causes that are not defects in materials and workmanship as well as normal depletion of consumable parts such as styli unless failure has occurred due to a defect in materials or workmanship.

MAP

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