MERCED, CA, SEPTEMBER 5, 2007 – Mammoth Sound & Vision, an audio purist, film and high-end music studio in Hollywood, CA, has turned to LaChapell Audio for its 992 TLS preamplifier, a dual mono, fully balanced vacuum tube preamplifier for commercial recording and broadcast. Mammoth Sound & Vision utilized LaChapell‘s 992 TLS preamp in recording the Royal Crown Revue album “El Toro,” as well as some solo work for its trumpeter, Scott Steen. more