Marshall Headphones unveils Hanwell and Stanmore speakers in India Marshall Headphones, known worldwide for manufacturing guitar amplifiers, launched the Hanwell and Stanmore portable speakers with Bluetooth connectivity in India on Friday. These speakers will be distributed by Zemax India. The Hanwell April 21, 2014 Game Online/industrial Power/IT Magazine/LCD TV/LED TV/Magazine Advertisement india/Mobile Launch/Motherboard/Networking/News/Security/Social Media/Tablet/Tech Hardware/Technology News/Telecom News/TV