< GO BACK L-Acoustics Ai Series Powers Walter Pyramid in Long Beach Posted on 2022-06-22·By CI Staff A new L-Acoustics Ai Series loudspeaker system is now helping the Long Beach State Walter Pyramid overcome its inherent acoustical challenges. Posted in: Acoustical Treatments & Sound Masking, Loudspeakers & Subwoofers, Sports Tagged with: acoustical design, challenging audio, loudspeaker systems, sports arena