MC Stepup TransformerT-320

An MM/MC switch loaded step-up transformer for high sound quality of the
MC cartridge draws out the music’s reality and the artist’s passion

Recieved Prizes

Ongen Publishinganalog Grand Prix
Ongen PublishingAudio Excellence Award 2022 Bronze Award
MJ Technology of the YearAnalog Components Honorable Mention
ONGAKU NO TOMO SHA CORP. STEREO magazineBest Buy Components 2021 Analog audio equipment 1st
ONGAKU NO TOMO SHA COTP. STEREO magazineBest Buy Components 2022 Analog audio equipment 2nd Place Classic

Product Outline and Concept

Pursuing our knowledge for cultivating the T-550, which was highly evaluated after it was released in 2020, we polished its sound quality by adding an MM/MC changing switch making it more convenient. The same 10mm thick aluminum slant panel which was used for the grand model T-550 is adopted and designed it so that it gives out high quality.


I. Adopting a strong chassis structure that follows the T-550 design

The front panel is a rigid box structure having a 10mm thick slanted aluminum panel, a 1.2mm thick copper plating board chassis and a 1.2mm thick copper plating cover. Non-magnetic stainless steel screws are used for assembly to ensure rigidity and reduce magnetic distortion.

Ⅱ. MC step-up transformer due to a special split winding structure developed by us.

We adopted our original divided winding wire structure. By winding a low-loss ultra-thick copper wire around a large EI core made of a 0.2mm thick 78% permalloy material, we brought into effect an outstanding frequency characteristic and phase characteristic at a wide band. This achieves outstanding characteristics of excellent linearity for low frequency and high-efficiency gain which reduces phase distortion in the audible band range and brings about a threadlike spatial expression and clearer sound image localization that can fill vitality over the entire range.

Ⅲ. Loaded with an MM/MC changing switch

An MM and MC changing switch is located on the front panel which makes it more useful.

Product Specification

Best Cartridge’s Output Impedance *1 1.5 – 40 ohms
Load Impedance 47k ohms
Gain 26dB
Frequency Response 10 – 50kHz (+2dB)
Dimensions W: 139 x H: 92 x D: 134
Weight 1.3kg
Input / Output Terminals (RCA) Gold Plated Terminals

*1: The cartridge that can be used has an output impedance of 1.5 – 40 ohms.