Theory Audio Design is now shipping five new amplified loudspeaker controllers.
Adding to its DLC Series loudspeaker controller line-up, the eight-channel DLC-1500.8d delivers a 6000W in a 2U chassis.
The brand-new PLC series, comprised of two eight-channel and two four-channel models, leverages Powersoft’s patented Class-D amplification topologies, SmartRail energy-management power supplies, Power Factor Correction and advanced DSP architecture to bring Theory’s premium sound into complex residential, professional, large venue and live sound applications.
Capable of delivering 1500W into 4 or 8-ohms from any channel pair, or 800W into 2 or 4-ohms all channels driven, DLC-1500.8d packs new levels of power into minimal rack space.
Equipped with upgraded high-current output Euroblock connectors that accept up to 10-gauge wire and four-channels of Dante / AES67 audio-over-IP digital I/O, DLC-1500.8d makes setting up and deploying even complex distributed audio systems painless and bullet-proof. DLC-1500.8d can drive up to 32 Theory 16-ohm loudspeakers in Lo-Z mode, or over 300 direct in Hi-Z mode – with no internal transformer required.

DLC-1500.8d can be configured with the DLC on-board web interface accessible via wired Ethernet, or via its on-board Wi-Fi access point and includes matrix mixing, priority audio routing and ducking, parametric EQ, delay, gain and limiter DSP objects to make system optimisation easy. Full API and modules for AMX, Control4, Crestron, Crestron Home, ELAN, Josh.ai, Q-SYS, RTI and Symetrix are available.
The new Theory PLC loudspeaker controller range comprises four models. The PLC-4K8 delivers eight channels at 500W per channel, while the PLC-8K8 provides eight channels at 1,000W per channel. The PLC-9K4 offers four channels at 2,250W per channel, and the flagship PLC-16K4 delivers four channels at 4,000W per channel.
Key features across the Theory PLC Loudspeaker Controller platform include proprietary Theory loudspeaker presets, native Dante and AES67 Audio over IP networking, all-channel power sharing, three configurable 1Gb network ports, including one with PoE, easy amplifier restoration via a USB key and maritime compliance.
All five models are available now. At CEDIA Expo 2026, Theory will display the DLC-1500.8d and PLC Series in Booth 1300.

