Ortofon

Overview

The Ortofon ST-70 is a high-performance step-up transformer (SUT) designed for audiophiles seeking precise and detailed sound reproduction from their Moving Coil (MC) cartridges. Built with high-quality components, such as Lundahl™ transformers and specialized mu-metal shielding, the ST-70 ensures exceptional sound clarity and minimal interference. Its dual mono design and premium connections make it an ideal choice for users looking to enhance their audio system's performance with superior stereo imaging and tonal balance.

Key Features

• High-Quality Lundahl™ Transformers: Provides accurate sound reproduction with minimal interference.
• Mu-Metal Shielding: Protects against internal and external electromagnetic interference.
• Dual Mono Design: Discrete circuitry for each channel eliminates crosstalk and distortion.
• Gold-Plated RCA Jacks with Teflon Insulation: Ensures optimal signal flow and minimal degradation.
• Internal Jumpers for Gain/Impedance Selection: Offers flexibility to match a wide range of MC cartridges.
• Minimal Internal Wiring: Preserves signal integrity for cleaner audio output.
• Compact and Sturdy Design: Built to fit seamlessly into high-end audio setups.

Detailed Description

Lundahl™ Transformers and Mu-Metal Shielding

The ST-70 employs high-quality Lundahl™ transformers known for their superior sound reproduction capabilities. These transformers are encased in specialized mu-metal shielding, which significantly reduces electromagnetic interference from both internal and external sources. This combination ensures that the audio signal remains pure and free from noise, resulting in a more detailed and accurate listening experience.

Dual Mono Design

The ST-70 features a dual mono design, providing discrete circuitry for each audio channel. This design approach eliminates crosstalk between channels, which can otherwise lead to distortion and a muddled stereo image. By maintaining strict separation between the left and right channels, the ST-70 delivers an expansive stereo field with improved clarity and lifelike realism.

High-Quality Connections

To ensure that the signal path remains as clean as possible, the ST-70 is equipped with gold-plated RCA jacks featuring Teflon insulation. These connectors provide optimal conductivity, ensuring minimal signal degradation when paired with high-quality interconnects. Additionally, the internal assembly of the ST-70 uses minimal wiring to preserve the integrity of the audio signal, further enhancing sound quality.

Flexible Gain and Impedance Options

The ST-70 is designed to be compatible with a wide range of Moving Coil cartridges. It features internal jumpers that allow the user to select between two gain and impedance settings. This flexibility enables the ST-70 to match the specific requirements of different cartridges, ensuring optimal performance and sound quality across various setups.

Application with MC Cartridges

The ST-70 is particularly well-suited for use with the Ortofon Cadenza Series and other high-end Moving Coil cartridges. MC cartridges typically require higher gain to produce an adequate output, which the ST-70 provides with its step-up transformer design. Unlike active MC phono preamplifiers, the ST-70's passive design offers superior noise performance, making it a preferred choice for audiophiles who prioritize sound purity and clarity.

Technical Specifications - Configuration A

Technical Specifications - Configuration B