AUDAC AUDPA74 Multichannel Digital Power Amplifier

The DPA series amplifiers are digital power amplifiers designed to meet the specialized needs of sound contractors for Multi-Zone distributed speaker systems. They are designed in six different models of Class D power amplifiers, divided in three different architectures to meet the requirements for all kinds of applications.

They combine the best of all features in one single series of amplifiers, providing an outstanding sound quality with all the known advantages of Class D Amplifiers. Such as the excellent efficiency and very low heat dissipation. And due to the complete passively cooled entity only a minimal of maintenance is needed, while ensuring maximum reliability.

The small size of a single rack space make them very interesting for fixed rack mount as well as mobile applications.

The DPA74 is built as multi channel power amplifier with four individual controllable channels containing various specific features and advanced protection circuitry which protects against DC malfunctioning, short circuit, overheating and overload.

The signal input connections are accommodated with balanced XLR connectors. The operation mode can be selected between Stereo mode, Bridge mode and Parallel mode. The output connections are accommodated with Euro-Terminal blocks.

• Model Name / Type: DPA74 / Digital Amplifier
• 8 ohms: 4 x 50 W
• 4 ohms: 4 x 75 W
• 8 ohms Bridge: 2 x 150 W
• THD+N:
• Signal / Noise: > 100 dB
• Frequency Response: 20 Hz - 20kHz
• Power Supply: 240 V AC / 50 - 60 Hz
• Dimensions (W x H x D): 483 x 44 x 300 mm

Model    CT475
Product Type    Amplifier
Channels    4
Sensitivity    1.4V
Rated Power Output    75W per Channel into 8 ohms
Signal to Noise Ratio (below rated power 20Hz to 20kHz, A-Weighted    110dB
Total Harmonic Distortion (THD) (full rated power, 20Hz - 20kHz)    Intermodular Distortion (from 0dB down to -40dB)    Frequency Response (at 1W into 4/8 ohms)    ± 0.5dB
Crosstalk (below rated power 20Hz to 1kHz)    > 70dB
Common Mode Rejection (20Hz to 1kHz)    > 55dB, typically > 70dB
Dimension (H x W x D)    1.75" x 19" x 14.25“
Weight    10 lbs (4.5 kg)

mplifier Gain 32 dB (Lo-Z), 33 dB (70V), 36 dB (100V)
Analog Inputs 4, electronically balanced, Phoenix-type
Audio Network No
CAN Bus Interface Yes (With Optional RCM-810 Card)
Continuous Rated Power
(1 kHz, THD 1%) 100v 500 Watts
Continuous Rated Power
(1 kHz, THD 1%) 2Ω 500 Watts
Continuous Rated Power
(1 kHz, THD 1%) 4Ω 500 Watts
Continuous Rated Power
(1 kHz, THD 1%) 70v 500 Watts
Continuous Rated Power
(1 kHz, THD 1%) 8Ω 250 Watts
Continuous Rated Power
(20-20 kHz, THD Continuous Rated Power
(20-20 kHz, THD Continuous Rated Power
(20-20 kHz, THD Continuous Rated Power
(20-20 kHz, THD Cooling Front-to-Rear, continuously variable fans
DIM 30 0.02 %
Electronics Type Amplifier
Frequency Response 15 Hz-30 kHz
Input Impedance (Balanced) 20 kΩ
Input Sensitivity 0 dBu (.775V)-2 Ω, +3 dBu (1.1V)-4/8 Ω, +6 dBu (1.55) 70V/100V
Intermodulation Distortion (SMPTE) 0.05 %
Mains Voltage 220 - 240 V, 50 - 60 Hz or 120 V, 50 - 60 Hz, 50 - 60 Hz
Maximum Bridged Output 4Ω 1000 Watts
Maximum Bridged Output 8Ω 1000 Watts
Network Control (IRIS-Net) Optional
Slew Rate 28 V/µs
Total Harmonic Distortion 0.05 %
Variable Load Drive (VLD) Yes
Height 2RU 88.1 mm (3.47“)
Width 481 mm (18.94“)
Depth 421.5 mm (16.59“)
Weight Net 11.1 kg (24.47 lbs)

Weight    10 lbs (4.5 kg)
Shipping Weight    15 lbs (6.8 kg)
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Model    CT475
Product Type    Amplifier
Channels    4
Sensitivity    1.4V
Rated Power Output    75W per Channel into 8 ohms
Signal to Noise Ratio (below rated power 20Hz to 20kHz, A-Weighted    110dB
Total Harmonic Distortion (THD) (full rated power, 20Hz - 20kHz)    Intermodular Distortion (from 0dB down to -40dB)    Frequency Response (at 1W into 4/8 ohms)    ± 0.5dB
Crosstalk (below rated power 20Hz to 1kHz)    > 70dB
Common Mode Rejection (20Hz to 1kHz)    > 55dB, typically > 70dB
Dimension (H x W x D)    1.75" x 19" x 14.25“
Weight    10 lbs (4.5 kg)