Cerwin-Vega has been in the audio business since 1954. Since then, they've become known for their intense volume capabilities. Even today, Cerwin-Vega manufactures highly efficient loudspeakers and powerful subwoofers with huge, red-ringed woofers.
Notable Cerwin-Vega products include:
Cerwin-Vega CLS series
Cerwin-Vega VE series
Cerwin-Vega CMX series
A history of Cerwin-Vega can be found on Wikipedia here.