The basic amplifiers are cost effective alternatives to the regular Praesideo power amplifiers, for situations where no built-in digital signal processing functions, such as equalizers, delay and AVC are required. They do not have a Praesideo network connection. Instead, these amplifiers are connected to the Praesideo network via the PRS-16MCI Multi Channel Interface, which provides the basic amplifier with audio signals and has full control. There are two versions, the PRS-1B500 (1 x 500 W), and the PRS-2B250 (2 x 250 W).
The basic amplifiers are completely supervised and fault events are reported via the multi channel interface (IEC 60849 compliant) to the Praesideo network controller. The basic amplifiers provide connections for separate group A and group B loudspeakers for each zone, and support class-A loudspeaker loop wiring. The units should be mounted in a 19"-rack with the included mounting brackets.
- High efficiency class-D amplifier channel(s)
- Switched mode power supply
- Local audio inputs
- Mains and battery operation
- Complete supervision
- IEC 60849 compliant
Characteristics:
- Depth : 400 mm
- Depth : 15.75 in
- Height : 88 mm
- Height : 3.46 in
- Power Consumption : (Pmax -3 dB / idle / standby)
- Total Harmonic Distortion : <0.3% (1kHz) at 50% of rated power
- Voltage : 48 VDC -10% to +20%
- Voltage : 115/230 VAC ±10%, 50/60 Hz
- Width : 483 mm
- Width : 19.02 in
- Speaker Outputs : PRS-1B500
- Speaker Outputs : PRS-2B250
- Signal to Noise : >85 dB with pilot tone off
- Mounting Width : 482.60 mm
- Mounting Width : 19 in
- Cross Talk : -70 dB (1 kHz) nominal (only multichannel)
- Local Audio Input : 0 dBV (symmetrical)
- Product Weight : 14 kg
- Product Weight : 30.86 lbs
- In front of brackets : 40 mm (1.6 in)
- Behind brackets : 360 mm (14.2 in)
- Rated load resistance : 20 ohm (100 V); 10 ohm (70 V)
- Rated load resistance : 40 ohm (100 V); 20 ohm (70 V)
- Rated load capacitance : 250 nF (100 V); 500 nF (70 V)
- Rated load capacitance : 125 nF (100 V); 250 nF (70 V)
- PRS-2B250 : 370 / 38 / 6 W
- 500 W : (1 min. at 55 °C)
- 250 W : (30 min. at 55 °C, cont. at 30 °C)
- 250 W : (1 min. at 55 °C)
- 125 W : (30 min. at 55 °C, cont. at 30 °C)
- 125 W : (cont. at 55 °C)
- 60 W : (cont. at 55 °C)
- Color : Charcoal with silver
- Minimum Frequency Response (Bandwidth) : 60 Hz
- Minimum Frequency Response (Bandwidth) : 0.06 kHz
- Maximum Frequency Response (Bandwidth) : 19000 Hz
- Maximum Frequency Response (Bandwidth) : 19 kHz
- Operating Temperature (Maximum) : 55 C
- Operating Temperature (Maximum) : 131 F
- Operating Temperature (Minimum) : -5 C
- Operating Temperature (Minimum) : 23 F
