Transformer for Turntable Ortofon ST-80 SE

Ortofon ST-80 SE: Transformer for Turntables

The ST-80 SE transformer from Ortofon is a high-end device designed to enhance the sound quality of turntables equipped with moving coil cartridges (MC). This transformer is specially designed for demanding audiophiles seeking detailed and warm sound reproduction. It stands out for its robust construction, effective magnetic shielding, and high-quality internal wiring. In this overview, we will explore in detail the technical features, design, performance, and advantages of the ST-80 SE transformer.

Design and Construction

Materials and Shielding

The Ortofon ST-80 SE is crafted with particular attention to detail and material quality. The transformer is magnetically shielded in a permalloy case, an alloy of nickel and iron known for its excellent magnetic shielding properties. This permalloy case is then inserted into a 10 mm thick aluminum cylinder, machined from a solid block of aluminum. This double layer of protection ensures effective insulation against surrounding electrical and electromagnetic noise.

Dual Mono Design

The Ortofon ST-80 SE is built with a pure dual mono design, meaning each channel (left and right) is handled separately. This approach allows for maximum channel separation, reducing crosstalk and improving sound clarity and precision. The internal wiring is made of pure solid-core OFC (Oxygen-Free Copper) wire, Teflon-insulated and gold-plated, ensuring optimal signal transmission.

Technical Features

Impedance and Gain

The Ortofon ST-80 SE transformer is designed to work with MC cartridges with an impedance below 10 ohms. It offers a gain of 27 dB at 1 kHz, effectively amplifying the low output of MC cartridges to make it compatible with MM (moving magnet) phono inputs on amplifiers.

Frequency Response

The Ortofon ST-80 SE features an impressive frequency response of 10 Hz to 100 kHz, with a tolerance of -2.5 dB to +0.5 dB. This wide bandwidth allows faithful reproduction of all musical nuances, from deep bass to crystalline highs.

Sound Performance

Detailed and Warm Reproduction

The Ortofon ST-80 SE is renowned for its ability to deliver detailed sound reproduction with a touch of warmth. This unique combination captures all the subtleties of the recording while adding a full-bodied and pleasant sound quality. Audiophiles particularly appreciate this feature, as it allows them to fully enjoy the richness and depth of vinyl recordings.

Isolation and Noise Reduction

The magnetic shielding and solid aluminum casing of the Ortofon ST-80 SE play a crucial role in isolating the transformer from ambient noise. This effective insulation reduces interference and background noise, enabling purer and more faithful sound reproduction. Audiophiles can thus enjoy distraction-free listening, even in noisy environments.

Compatible Cartridges

The Ortofon ST-80 SE is compatible with a wide range of high-quality MC cartridges, including the Cadenza series, Exclusives (Xpression, MC Anna, MC A95, MC Windfeld Ti, MC Century), as well as the historic MC A90 and MC Windfeld, and SPU cartridges. This extensive compatibility allows users to get the most out of their MC cartridges, whatever their preferences or specific needs.

Product Advantages

Detailed sound reproduction with a touch of warmth
Maximum channel separation thanks to dual mono design
Effective insulation against electrical and electromagnetic noise
Compatibility with a wide range of high-quality MC cartridges
Easy installation and intuitive use
Internal gold-plated OFC copper wiring for optimal signal transmission
Gold-plated RCA connectors with Teflon insulation
Exceptional stability thanks to a substantial weight of 1.5 kg

Technical Specifications

General Specifications

Type: Moving Coil (MC) Phono Transformer
Internal Wiring: Pure solid-core oxygen-free copper (OFC), gold-plated, polytetrafluoroethylene (Teflon) insulation
Shielding:
- Permalloy alloy casing
- 10 mm thick aluminum cylinder