
IKEDA — Analogue accessories
Transformer IS-201
The definitive step-up transformer for pure, reference-grade moving coil playback.
The IST-201 represents the ultimate marriage of classical transformer theory and modern material science, serving as the essential partner for Ikeda’s reference-grade moving coil cartridges. It functions as the critical interface that raises the delicate voltage of an MC cartridge to a level suitable for a standard phono input, all while preserving the integrity and texture of the original signal.
Positioned as the flagship matching transformer within the Ikeda analogue ecosystem, the IST-201 is constructed to eliminate the common colourations found in lesser step-up devices. By employing hand-wound coils and proprietary magnetic core materials, it provides an exceptionally transparent path that allows the true character of the cartridge to shine.
The sound character of the IST-201 is marked by its absolute composure and immense dynamic scale. It avoids the softening of transients often associated with transformer-based amplification, instead delivering a fast, detailed, and deeply textured performance. It is the preferred choice for enthusiasts who demand a grounded, authoritative, and emotionally involving reproduction of their vinyl collection.
Key Features
01
Proprietary magnetic core
Features a high-permeability core that ensures exceptionally low distortion and wide bandwidth.
02
Precision hand-wound coils
Each transformer is meticulously wound by hand to ensure tight channel matching and phase accuracy.
03
Heavy-duty vibration damping
The chassis is engineered to suppress mechanical resonance, ensuring an ultra-quiet background.
04
Optimised load impedance
Versatile design supports a wide range of moving coil cartridges with varying impedance requirements.

Chapter 01
Engineering Philosophy
Ikeda Sound Labs treats the step-up transformer not merely as a signal amplifier, but as a critical passive component that must remain sonically invisible. The IST-201 was developed through extensive trial-and-error, focusing on the careful selection of coil wire and shielding to ensure that no phase shift or frequency roll-off is introduced into the delicate signal path.

Chapter 02
Build Quality
The IST-201 is housed in a rigid, thick-walled metal enclosure that serves to shield the internal coils from external electromagnetic interference. Every internal connection is point-to-point wired to ensure the shortest possible path, while high-quality RCA sockets provide a secure, low-resistance interface for high-end phono cables.

Chapter 03
Sonic Signature
Users of the IST-201 often note a profound sense of 'weight' and 'body' in the music that active gain stages often miss. It excels at reproducing the natural timbre of instruments and the spatial cues of the recording venue, offering a level of transparency that feels both modern in its precision and vintage in its musical fluidity.
Specifications
TypeMoving coil step-up transformer
Frequency response10Hz to 100kHz ±0.6dB (3Ω/47kΩ)
Weight2.1kg
Input Impedance1.0Ω to 6.0Ω
Load Impedance47kΩ or more
Channel Separation90dB or more (1kHz)
Boost rate26dB
Channel Balance Within 0.1dB (1kHz)
External dimension140mm(W) x 55mm(H) x 95mm(D)
weight1.7kg
