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View All / Rapport Brands / Ortofon
Ortofon ST-90 MC Transformer

Ortofon ST-90 MC Transformer

Until 2025-08-31T16:00:00.000+00:00 [LEVEL UP] Get a Free Audiophile Gift For Spending Of Designated Amount on selected categories

HK$14,400.00
HK$11,500.00
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Description

**Products are sold online and in-store simultaneously. The stock quantity may not be updated in the online system in time. **

**Please contact our team for confirmation.**

**Goods in stock will be sent within 1-3 working days.**



The ST-90 Moving coil transformer delivers a detailed reproduction with a touch of warmth accompanied by a full bodied sound quality. The frequency response is wide and flat.


The transformer is magnetically shielded in a permalloy case, which in turn is inserted into a robust 10mm thick aluminum cylinder bored out of a solid aluminum block. Together with the heavy metal case the transformer effectively isolates against environmental noise.


The stability of the transformer is superb thanks to its substantial weight of 2kg


Equipped with XLR terminal for full balance connectivity as well as common RCA plug terminal.


The ST-90 will be a perfect match to most high quality MC cartridges, such as the Cadenza series, the MC A90, the MC Windfeld, the Ortofon Xpression, MC Anna, MC A95 as well as the SPU cartridges.


Specification

Frequency response: 10 ~ 100kHz (+ 0dB-2.5dB)

Step-up ratio: 24dB (47kΩ / 1kHz)

Compatible Cartridge Impedance: 2Ω ~ 60Ω

Load Impedance: 47kΩ or more


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

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


Technical data Configuration B:

Recommended cartridge impedance < 10 Ω

Gain 30 dB at 1 kHz

Frequency response 10 Hz - 80 kHz ± 1 dB

Recommended load 47 kΩ / 200 pF


Dimensions and weight

Dimensions: 58 mm(W) x 135 mm(H) x 150 mm(D)

Weight: 1.233 kg

Shipping & Payment

Delivery Options

  • Self pick up at showroom - Unit 1010-1012, Block B, Seaview Estate, 4-6 Watson Road, Causeway Bay, HK
  • Special arrangement of delivery method (Please provide address and contact our staff)
  • Ship with other orders
  • Self Pick Up at Exhibition (Please confirm by staff) *8-10 Aug 2025 Only
  • S.F. Express - EF Locker Pickup (Freight Collect) ☆☆☆Free shipping is available for orders over $500☆☆☆
  • S.F. Express - Store Pickup （Delivered within 3-7 working days）Free shipping is available for orders over $500. If the threshold is not met, you will be charged for shipping when the goods arrive.
  • S.F. Express - Circle K Store Pickup
  • S.F. - Business Station (Free SF shipping is available for orders over $1000. If the threshold is not met, you will be charged for shipping when the goods arrive.)
  • S.F. Express - 7-11 Store Pickup
  • S.F. Express - Office / Home Delivery （Delivered within 3-7 working days）

Payment Options

  • Pay at the Exhibition (8-11 Aug 2025 Only)
  • FPS
  • In-store Payment
  • Octopus
  • Bank Transfer
  • Alipay (HK)
  • WeChat Pay
  • Credit Card
  • Apple Pay
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