Engineering Notes

A collection of technical insights, material research, and design principles behind Pure Line Audio products — written for listeners who care about signal integrity, not marketing claims.
Balanced vs RCA cables
Balanced vs RCA Connections: What’s the Difference and When It Matters
Balanced (XLR) and unbalanced (RCA) connections differ in how they handle noise, grounding, and signal transmission. This article explains how each works and when the difference actually matters in real... Mehr lesen …
Ground Loop Hum: How to Diagnose and Fix It
Ground Loop Hum: How to Diagnose and Fix It
Ground loop hum is the most common noise complaint in hi-fi systems, and most guides miss its real cause. Here's how to actually diagnose and fix it. Mehr lesen …
Do Power Cables Reduce Noise in Audio Systems?
Do Power Cables Reduce Noise in Audio Systems?
Do power cables reduce noise? Understand how shielding, grounding, and current stability influence electrical noise in hi-fi systems.   Mehr lesen …
Power distributor and power cable hi-fi
Power Cables Explained: What They Do (and What They Don’t)
Power cables define how real-world AC disturbances interact with audio power supplies. This article explains what power cables do, what they do not do, and why stability, geometry, and noise... Mehr lesen …
Signal Noise Explained: What It Is, Where It Comes From, and Why It Matters
Signal noise is electrical energy created by interactions between components, conductors, and reference points. It can exist below audibility while still affecting timing, dynamics, and spatial information. Understanding noise means understanding the electrical environment your system operates in. Mehr lesen …
Cable Geometry Explained: Why Structure Matters as Much as Materials
Cable Geometry Explained: Why Structure Matters as Much as Materials
Materials matter, but geometry determines electrical behavior. A practical explanation of how spacing, twisting, grounding, and stability shape performance in high-end audio cables.   Mehr lesen …
What Is Graphene in Audio Cables? The Science Explained
What Is Graphene in Audio Cables? The Science Explained
Graphene is an advanced conductive material used to manage noise and energy behavior in audio cables. This article explains what graphene is and how it interacts with copper and silver... Mehr lesen …
Silver vs Copper Speaker Wire and Audio Cables: Which Actually Sounds Better?
Silver vs Copper Speaker Wire and Audio Cables: Which Actually Sounds Better?
Silver and copper audio cables differ not by hierarchy, but by electrical behavior. Conductivity alone does not determine performance. Material choice affects detail, stability, and system balance, and must be... Mehr lesen …