IWISTAO

Home
IWISTAO
300b tube amplifier

Jan 19, 2026 | 0 comments

My LS3/5A Journey

Published by IWISTAO Immersed reading—like disappearing into a novel. When it comes to hi-fi, the British BBC LS3/5A is a hurdle almost no audiophile can avoid. If you try to...

Jan 12, 2026 | 0 comments

LS3/5A and Tube Amplifiers: A Practical Matching Experience

Published by IWISTAO Why LS3/5A is often described as “not happy without tubes,” and what really makes the pairing work. 1. Understanding the Nature of the LS3/5A The BBC LS3/5A...

Sep 19, 2025 | 0 comments

The Ultimate Upgrade? Exploring Amorphous C-Core Output T...

A 300B tube in a classic SE Class A circuit constantly draws a significant amount of DC current through the primary winding of the output transformer (typically around 60mA). This DC current can easily saturate a standard transformer core, causing massive distortion and a collapse of inductance. To prevent this, SE output transformers must have a small air gap in their magnetic path.

This is where amorphous C-cores shine. They possess a high saturation flux density, meaning they can handle a strong magnetic field before saturating. This property, combined with their low loss, allows designers to create a gapped transformer that maintains high inductance even with the DC bias, a key factor for achieving deep and authoritative bass.

Jul 20, 2025 | 0 comments

More Than a Tube: Why Audio Note's 300B Amps Are an Audio...

Published by IWISTAO In the world of high-fidelity audio, some components are just gear, and others are legends. Then there are those that transcend legend to become something of a...