Hi-Fi Speakers
PRV AUDIO 6.5 Inch Shallow Midrange Speaker, 6MR200A, 200 Watts, 8 Ohm Shallow Mount Car Audio Slim Speaker, 1.5 in Voice Coil, Compact for Doors (Single)
DESIGNED FOR EFFICIENCY: The 6MR200A midrange speaker is the evolution of the 6MR250A, this unit was designed with the goal of producing the highest possible output from a compact design without sacrificing performance, with only 2.24″ mounting...
https://www.bizrate.co.uk/hifispeakers/prv-audio-6-5-inch-shallow-oid36306546336.html