Amazon.com: American Standard Beta-12A 12" Pro Audio Speaker, 250 Watts at 8 Ohms : Musical Instruments
Eminence Beta 6A speaker. The Eminence Beta 6A is a 6.5" 8 ohm speaker for all mid-bass or midrange speaker systems. Beta-6A is a 175 watt RMS 8" speaker.
SA Beta-12LTA 12 Inch full Range Woofer Speaker for DIY Infinite Baffl – SpeakerAddict
Eminence Beta 8A speaker. The Eminence Beta 8A is a 8" 8 ohm speaker for all bass applications including bass guitar cabinets. Beta-8A is a 225 watt RMS 8" woofer.
Beta 4 Neodymium 12" speaker, 500 Watt
Beta Four
8 inch Eminence American Standard Series Replacement Speaker – Eminence Speaker, LLC