Digmoda DDC552 Mono Plate Amplifier, 3-Channel

KSC Digmoda DDC552 Mono Three-Channel Plate Amplifier with Integral D-Pro DSP

The DDC552 Three-Channel Plate Amplifier is the ideal choice for fabricating traditional tri-amped loudspeaker systems. The unit features a 500W section for powering a low-frequency driver, a second 500W section for the mid-frequency driver and a 250W section for the high-frequency driver. Programmable DSP lets you tailor the output of each of these three sections to match the precise requirements of the chosen loudspeaker components, including crossover frequencies, overall equalization, component-overload protection, level trims and time-alignment delays.

In today’s cost-conscious marketplace, powered loudspeaker systems are often the first choice for production studios, sound-reinforcement operators and high-end consumers. Loudspeaker manufacturers have several available options. Source a conventional amplifier and hope that it provides the flexibility you need. Or maybe design your own amplifier modules. Alternately, why not take advantage of an all-digital solution from KSC Industries – in other words, a Digmoda® Class-D Plate Amplifier with an integral DSP section– and one that provides affordable, simple-to-fabricate designs for your customers. Existing loudspeaker systems also can benefit from Digmoda’s D-Pro™ DSP to fine-tune the system’s frequency response and/or add specific characteristics for a target marketplace or end user. There is, quite literally, unlimited potential for improvement.

KSC Digmoda Digital Plate Amplifiers offer original equipment manufacturers a unique, easily implemented solution. Our Class-D Plate Amplifiers with user-programmable D-Pro Digital Audio Processor can turn any studio monitor or sound-reinforcement loudspeaker into a better sounding, self-contained, active system that extends your market opportunities. KSC’s built-in D-Pro Digital Audio Processing System consists of two components: a Windows® XP-compatible D-Pro Software Application which, via an easy-to-use Graphical User Interface, lets OEM users adjust each system parameter; and a DP Series Digital Audio Processor (DAP) Module included within each plate amplifier that utilizes up to 16 Bi-quad filters per channel to provide the necessary ultra-precision, 24-bit/96 kHz DSP functions to implement the system settings developed by the D-Pro Software. During manufacturing, you simply connect a PC or laptop to the plate amplifier via a USB port, and load the relevant crossover, EQ, overload protection and delay settings into the amplifier’s non-volatile flash memory. It couldn’t be easier.

• Reduced Time to Market… New and updated products can be designed and put into production in a fraction of the time required with conventional amplifier designs and analog components.


• No Tolerance Stack… All-digital D-Pro circuits are totally predictable and produce results accurate to a fraction of a dB at any crossover frequency, bandwidth and level adjustment. Ultra-accurate results are just a keystroke away.


• More Granular System Performance… Because they are generated with all-digital precision, D-Pro crossovers, dynamics and EQ circuits are surgically accurate, which translates to tight, predictable response across the entire frequency range.


• One SKU Fits All… Any Digmoda Plate Amplifier can be used within a number of different loudspeaker models, with configuration-specific D-Pro system settings to suit different drivers and cabinet designs.

The DDC552 Mono Three-Channel Plate Amplifier combines a 500W section for powering a LF driver, a 500W section for a MF driver and a 250W section for a HF driver. The unit is designed to mount into a rear-panel cutout on the loudspeaker cabinet. The plate amplifier is secured to the enclosure via screws that connect through the rear panel to the amplifier’s aluminum enclosure, with a supplied rubber gasket ensuring an air-tight fit. Only 2.5 inches of depth is required within the speaker cabinet, making it suitable for even slim-line designs. For ultra-precision audio quality, we use only Class-D Power Amplifiers with analog feedback. To ensure audiophile-quality, Digmoda Class-D circuits utilize a proprietary topology that converts a low level analog signal into a high-power pulse-width modulated (PWM) output. All our models are more than 80% efficient, thanks to a highly-evolved Class-D design and power supplies. They produce very little heat – a useful feature for plate amplifiers.

Input/Output Connections

• Single six-way Molex connector on rear of amplifier chassis for individual loudspeaker drivers.


• Line-level Audio-In via industry-standard XLR connectors on front of chassis (pin #2 Hot).


• Front-panel Signal-Overload Indicator and Power-on LEDs.


• Input sensitivity: Average 1.28V RMS variance


• Input impedance: 36 kΩ, balanced; 18 kΩ, unbalanced.


• DAP Communications Port via bi-directional USB connector for DSP adjustments.


• Power In/Out via industry-standard PowerCon® lockable connectors; available as 115V or 230V.

About the Manufacturer

KSC Industries enjoys a 35-year reputation as a leading US-based OEM supplier of design, development and manufacturing resources for the loudspeaker industry. The Digmoda Professional Power Amplifier Systems with integral D-Pro DSP filters, crossovers and delay enable loudspeaker manufacturers to create and voice self-powered loudspeaker systems. The combination of powerful, easy-to-use D-Pro calibration software, coupled with fully configurable onboard signal processing, significantly reduces product development time by allowing an OEM manufacturer to eliminate frequency-response, time, phase and power anomalies in real time. Once completed, system settings are simply and easily loaded into the plate amplifier’s nonvolatile flash memory during loudspeaker production. A complete line of Digmoda Plate Amplifiers is available in a variety of power-delivery levels and configurations.

Physical Dimensions

• Weight: 9.65 lbs/4.38 kg; 12.75 lbs/ 5.78 kg (boxed).


• Dimensions: 18.58 x 7.00 x 2.52 in (H x W x D); 47.19 x 17.78 x 6.40 cm.


• Cutout Hole: 17.66 x 6.09 in (H x W) with 0.1 in corner radius; 44.86 x 15.57 cm with 0.25 cm corner radius.