DSP & Amplifier



The D+ / D+Q models are based on Class D output circuit. The great advantages of this technology are: low heat dissipation, compact size,and sonic integrity.

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Reactive “back EMF” from the speaker is recycled to the power supply, and an efficiency higher than 85% keeps AC power needs to a minimum, while delivering more energy to the speaker. Thanks to the high efficiency the D+ / D+Q series dramatically reduce power distribution demands compared to older high power amplifiers. In addition to higher power, the D+ / D+Q Series offers higher input voltage, multiple selectable input gains, and with the four channel models a very high power density. For those users who simply want a high performance amplifier to go with their existing processor or console, the D+ / D+Q series is an ideal choice, offering high power, excellent value, and zero signal latency.

The D+ / D+Q series have an open input architecture and can have as option a Digital Signal Processing board and a remote control that allows monitoring of all key amplifier parameters: power on/off, channel mutes, and channel solo functions. The high efficient global power supply is regulated (R-SMPS), works anywhere in the world and offers PFC (Power Factor Correction). The regulated power supply easily deals with a very high variation in the AC mains voltage: it can drop by up to 20% below its nominal level e.g. to 180VAC instead of 230VAC without any loss of the amplifier’s rated output Power. D+ / D+Q Series incorporates comprehensive warning and protection features to safeguard the amplifier and all connected loudspeaker drivers.

Front-panel indicators give clear warnings when any potential problems are detected. Protection measures are enabled only when critical thresholds are passed or at start-up. Additionally, a soft-start circuit limits initial current draw when amplifier is turned on. The complete protection / warning suite includes: Short circuit, open circuit, thermal, RF protection, mains over / lower voltage, on/off muting, DC fault shutdown, clip limiter. Under normal use these features are inaudible and all protection methods are independent for each channel. The L.S.C. protection constantly monitors the current at the amplifier’s output. When load’s current exceed the amplifier’s limit, the output voltage will be automatically re-adjusted to keep the output devices in a security condition.

An additional circuit, with automatic reset, shut down the amplifier’s channel if a full short is made between a positive output and GND. The temperature management system sense the output devices temperature. In case of inadequate ventilation or overload, the hi-temp LED start to blinking and a level compensation process will be enabled. This protection safeguard the amplifier and prevent the definitive muting for overtemperature.The cooling is front to back airflow.


- Flexible routing between Inputs and Outputs
- 40-bit floating point DSP (Highly accurate digital processing) - High Performance 24-bit A/D and D/A Converters
- Accurate 1 Hz Frequency Resolution.
- 6-Band Parametric Equalizers for each Input and Output
- Full-Function Limiters on Output Channels
- “One Touch” easy access setup button
- Backlit 4-Line x 32 Character LCD Display
- Full 5-segment LEDs on every Input and Output
- Storage up to 30 Program Setups
- USB and RS-485 interfaces for PC Control and Configuration - Pink noise and single frequency generator
- Original Neutrik XLR connectors
- Security Lock


Input Impedance: >10k Ohms Output Ipedance:50 Ohms Maximum Level: +20dBu Type: Electronically balanced


Frequency Response:+/- 0.1dB (20 to 20kHz) Dynamic Range: 115dB typ (unweighted) CMMR: > 60dB (50 to 10kHz)
Crosstalk: < -100dB

Distortion: 0.002% (1kHz @+4dBu)


Processor: 32-bit (40-bit extended) Sampling Rate: 96kHz
Analog Converters:High Performance 24-bit Propagation Delay:1.5ms


Display: Backlit LCD 4x32
Level Meters: 5 segment LED
Buttons: Mute/Edit Controls One Touch Menu Controls 4 Ways Menu Controls
Dial Encoder: Embedded Thumb Wheel

Rotary Thumb Wheel - Changes parameter data values and press to confirm the changes. The wheel has travel velocity sensing which ease large incremental data modifications according to the speed dialed. To confirm the setting press the wheel one time.


Audio: 3-pin XLR
USB: USB port
Power: Standard IEC Socket General
Power: 115 / 230 VAC (50 / 60Hz) Dimensions: 19-in x 1.75-in x 8-in (483x44x203 mm)


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