Your browser is out-of-date!

Update your browser to view this website correctly. Update my browser now


Theory Audio Design Introduces Distribution Loudspeaker Controller for Residential and Commercial Applications

Available now, the DLC-250.4 offers four channels of intelligent power, a full DSP matrix, and is TCP/IP controlled through a wired connection or via its on-board Wi-Fi access point.

Theory Audio Design has introduced the DLC-250.4 distribution loudspeaker controller. Designed for any residential or commercial installation where distributed audio is desired, each DLC-250.4 offers four channels of intelligent power, a full DSP matrix, and is TCP/IP controlled through a wired connection or directly via its on-board Wi-Fi access point.

Theory Audio Design – DLC-250.4 Distribution Amp

The DLC-250.4 is designed to be at the core of every Theory distributed audio system. With channel-pair power sharing of up to 250 watts, each DLC-250.4 offers the flexibility to power any system size. Via its configurable outputs, the DLC-250.4 can power up to 16 Theory 16-ohm ceiling or pendant loudspeakers in Lo-Z mode, and up to 64 Theory architectural speakers in Hi-Z mode — or an optimal hybrid of both or in any quantity in between. This feature is especially beneficial in commercial spaces like bars, restaurants, retail environments, fitness centers, and spas where a combination of power, from quiet background to loud foreground audio, is required.

In hotels, education facilities, and corporate environments where there are multiple rooms of varying sizes, the DLC-250.4 offers complete flexibility in terms of available power. The S/PDIF master/slave functionality allows multiple DLCs to be used to cover all these needs and each loudspeaker controller only takes up a half rack space. House of Worship requires reliable, high-quality amplification of voice, while also covering a large distribution area with many specialized speakers. The DLC-250.4 is up for the challenge, providing high-quality amplification and speech intelligibility throughout large spaces. For home cinema and surround sound systems, a single DLC-250.4 is also perfect for 3.1 systems (and larger if using multiple DLCs).

“Because the DLC can operate in both 8-ohm or 70V/100V modes, separately or in combination, and because all of our architectural loudspeakers have the same dual operation, systems of any size or complexity can easily be realized from a tiny half-rack space unit,” says Paul Hales, president of Theory Audio Design. “And because our ceiling and pendant models can operate at 16 ohms, up to 16 speakers can be powered from a single half-rack unit without the need to invoke the 70V transformers; this is remarkable from a 6-pound amplifier and insures the highest possible fidelity even in systems with a high quantity of speakers.”

To rack mount or wall/surface mount the DLC-250.4, Theory offers two complementary accessory kits. The DLC-250.4 is safety and EMC certified and compliant to ErP and EnergySTAR. Later this year, a Dante-enabled version of the DLC-250.4, the DLC-250.4d, will offer even further installation flexibility and simplicity by adding Dante network audio and AES67 compatibility. A full list of DLC-250.4 specifications is available below.

The DLC-250.4 is available to order now for $1950/each U.S. MSRP and will begin shipping in May. Interested dealers, reps, and international distributors are encouraged to reach out to Theory’s VP of sales, Mark Goldman, at: [email protected] for more details.

Theory DLC-250.4 Specifications


4-Channel Amplified Distribution Loudspeaker Controller

  • Half-Rack Chassis
  • IP Control
  • Integrated Wi-Fi Access Point
  • Power Sharing
  • Lo-Z and Hi-Z (70V/100V) Operation


  • 4 x Balanced Analog Audio with selectable input sensitivity
  • 4 x RCA Unbalanced Analog Audio
  • 1 x S/PDIF Digital Audio


  • 4 x Speaker Outputs
  • S/PDIF Digital Audio Out

Trigger: +12 VDC

Audio Operation: 48 kHz/24-bit

On-Board DSP: 48 kHz/32-bit

DSP Features:

  • Loudspeaker Processing for all Theory Models
  • Input Trim
  • Signal Routing
  • Gain
  • Delay
  • Polarity
  • Limiter

Frequency Response: 20Hz-20kHz, +/-0.25dB

Power Output:

  • 250W per channel @ 4, 8, 16 ohms and 70V/100V
  • 125W per channel @ 4, 8, 16 ohms all channels driven
  • 125W per channel @ 70V/100V all channels driven

Voltage Gain: Variable

Input Sensitivity: Variable (mic level to +14 dBu)

Power Requirements: Standby: <1W

(1/8 power, all channels driven): 70W

Idle Noise(A-Wt): –78 dBV

Signal to Noise Ratio: >106 dB

Distortion (1kHz, 1dB below max output): <0.02%

AC Operation: 100V-240VAC, 50-60 Hz

Finish: Matte Black

Accessories: Rack Mount Kit, Wall/Surface Mount Kit

Dimensions: 1.75″ H x 8.7″ W x 11.7″ D

Weight: 6.2 lbs.

For more information, visit