Others

4SCI https://wp.4sci.org — Sciency stuff.

CarMiZa https://carmiza.com — Deep details on the ongoing re/Build by Mike Michne of Earl Zausmer’s Legendary (red) BMW 540 Car Audio System

MagicBus https://magicbus.biz — Detailed speaker performance analysis. Superb, perhaps unequalled interior acoustic design.

PEDALIA https://pedalia.org — Guitar effects pedals.

SCHEMS https://schems.com — Bottom-up Electronica.

TUBE-DATAhttps://tube-data.com — Tube info.