Stereo PA amplifiers with up to 3.5kW of powerThe stereo PA amplifiers of the DDA series with integrated limiter have been specially designed for stage and the disco applications. The amplifiers may be used in stereo operation, parallel operation or in mono bridge operation. All models employ a Class D architecture. Thanks to their switch mode power supply unit, the weight of the amplifiers is considerably lower than that of amplifiers of comparable power equipped with a standard power supply unit which makes them particularly attractive for rental companies. The amplifiers and the speakers connected are protected through extensive protective circuits.

Stereo PA amplifier with SMPS, 2 x 850 W / 4 ohms

• Stereo PA amplifier with class D circuitry
• Low weight and height due to integrated switch mode power supply
• Reliable power amp with high impulse stability for a wide range of applications (e.g. compact PAs, multi-way PAs, concerts)
• Limiter and speaker switch-on delay
• 3 operating modes can be selected (stereo, parallel or bridged)
• 2 calibrated level controls for precise level adjustment
• Input sensitivity adjustable
• LED VU meter and LEDs for activated protective circuit (protect), overload (clip), and signal per channel
• Highly efficient front-to-rear air routing
• Electronically balanced inputs via XLR mounting jacks, with XLR feed-through outputs
• Speaker outputs via lockable Speaker plugs and screw terminals
• Rugged steel chassis with aluminum front panel
• Housing design: (19") 48.3 cm rack installation 2 U

Power supply:	100-240 V AC, 50/60 Hz
Power consumption:	150 W 1/8 power
Output power:	2 x 850 W RMS (4 ohms)
	2 x 500 W RMS (8 ohms)
Power connection:	Mains input P-Con (blue), mounting version Power supply cord with safety plug (provided)
Frequency range:	20 - 20000 Hz
S/N ratio:	>100 dB
Circuitry:	Class D
Connections:	Input: 2 x line via 3-pin XLR
	Output: 2 x line via 3-pin XLR
	Output: 2 x Speakers via Speaker built-in socket (f)
Input sensitivity:	39,3 dB; 37 dB; 32 dB switchable
Input sensitivity:	ca. 0,775 V; ca. 1,0 V; ca. 1,81 V switchable
Distortion:	<0,15 %
Housing design:	(19") 48.3 cm rack installation 2 U
Width:	48,3 cm
Height:	8,9 cm
Depth:	30,7 cm
Weight:	6,00 kg
Damping factor:	>500
Voltage gain:	38.2 dB
Slew rate:	>10 V/µsec
Protection:	Softstart, short-circuit, overheat, overload, clip limit, RF and VHF signals
Cooling:	2 temperature-controlled fans, front-to-rear
Controls:	Power switch, input attenuators, mode switch stereo/parallel/bridged, input sensitivity
LED indicators:	protect, clip, -5 dB, -10 dB, -20 dB (per channel)
Construction:	steel chassis, aluminum front