When AKG introduced the variomotion technology (speaker diaphragm with dual density/velocity) it was a revolutionary way to expand the frequency range. Mind you, this was in the age of ferrite magnets where 20-20000Hz was a not so easy task to accomplish. This technology has since been adopted...

Hi fellow Head-Fi'ers! Greetings from a long time lurker   I just got a TA2021 T-amp from Indeed hi-fi lab. http://www.aliexpress.com/item/Indeed-Audiophiles-Grade-Class-T-Amp-TA2021S-Mini-Cute-Hi-Fi-Amplifier-25WX2-Tripath-12V-5A/1111032656.html   I want to turn it into a dedicated...